We have not space to record even the principal of Owen's numerous published papers. His earliest communications to the royal society were papers on the generation of the ornithorhynchus and of the kangaroo. In numerous memoirs between 1835 and 1862, he expounded the structure and affinities of the higher cfladrumana; and in these and other papers, he proposed the use of the brain-structure, as an important clement in classi fication. It has been objected, that the particular parts to which lie referred in charac terizing his highest class, are found in the lower classes; hut the objectors forget that he does not use the existence of the parts as his characters, hut only their remarkable devel opment. A similar objection may be urged against every system of classification, for no decided line can be drawn around any group, the whole animal world being united by a graduation of structure.
His exposition of the recent and fossil birds of New Zealand is well known. He first published two elaborate pipers on the anatomy of the apteryx, and then followed at intervals 7 or 8 monographs on the gigantic struthions birds which mice existed in these distant islands. His descriptions and restorations of extinct animals are perhaps the most important of all his labors. He has published a monograph of the British fossil mammal la and birds, and 6 parts of an elaborate systematic history of British fossil. reptiles. In describing the fragmentary fossil relics brought home by Darwin from South America, he established many remarkable forms from very scanty materials, and showed that there existed in America, during the Tertiary period, a mammalian fauna, the individuals of which were, for the most part, of gigantic size, yet similar in type to the existing animals of that continent. Subsequently, he clearly expounded the various genera of huge sloths from the same region, whose remains were previously confounded or misunderstood. A series of fossils from Australia revealed to him a remarkable group of gigantic marsu pials, resembling in type the present tenants of that island-continent. He was the first to
expound the structure and affinities of the singular long-tailed bird from Solenhofen. See his well-known Paleontology (1861). Amongst his more recent works in this field are The Fossil Reptilia of South Africa (1876); On the Fossil illammals of Australia, and on the Extinct,Tarsupials of England (1877); and On the Extinct Wingless Birds of New Zealand (1879).
His great work on the microscopic structure of the teeth must be named. The Odon tography, published in 1849-45, contains descriptions and exquisite drawings of the minute structure of a very extensive series of the teeth of every class of animals, and forms an immense store-house of information alike to the anatomist and the geologist.
He has published original papers on every branch of the animal kingdom, living and fossil; and it has been justly said of him, that " from the sponge to man, he has thrown light over every subject he has touched." Sonic idea of the magnitude of his labors may be formed from the fact, that his published productions amount to more than 300 different papers and works, many of them being of the most voluminous and laborious character.
Owen, in 1833, married the only daughter of Clift, his colleague at the college of surgeons. In 1838, lie resumed his position as Fullerian professor of physiology in the royal institution of Britain, which, some 20 years before, he had filled for two sessions; and in the following year he was appointed Reade lecturer by the university of Cam bridge, but has now resigned these offices. Ile is a fellow and active member of most of the metropolitan scientific societies, one of the 8 foreign associates of the institute of France, and an honorary member of many foreign societies. From France he also received the order of the legion of honor; from Prussia, the order pour le Nerite; and from Italy, the order of St. _Maurice and St. Lazare. He was made a companion of the bath in 1873.