Dr. J. E. Gray on the Species of Manatees. 13T 



of the Dugong of the East-Indian seas. The paper and plates 

 are reproduced in his 'Lectures on Comparative Anatomy* (vol. iv. 

 t. 55, 56). This is the best figure of the entire animal that I 

 have seen. The next best is that of the Manatee of the Orinoco, 

 figured in Wiegmann's ' Archiv* for 1838, where the form of 

 the mouth of the living animal and the horny plate on the 

 outside of the grinders in the lower jaw are shown. 



In the ' Journal of the Academy of Natural Sciences of Phila- 

 delphia' for 1823 (vol. iii. t. 13) Dr. Harlan described and 

 figured the skull of a young Manatee procured from the coast 

 of Florida, which he regarded as a new species, under the name 

 of M. latirostris. He copies the front part of the skull of M. 

 australis and M. senegalensis, in Cuvier's ' Ossemens Fossiles/ 

 for comparison with the skull he figures ; and M. de Blainville, 

 in the ' Osteographie ' (t. 3), copied his figure of the front part 

 of the skull of M. latirostris for comparison with his figure of 

 the skull of the young Manatee from Cayenne, which M. de 

 Blainville considers the same as that figured by Dr. Harlan. 



In the Paris Museum there is the skull of a young animal 

 without teeth, which was sent from Cayenne by M. Plie, and 

 is figured by M. de Blainville, in his 'Osteographie/ t. 3, as 

 Manatus latirostris. 



In the Leyden Museum there is the skeleton of an American 

 Manatee which was examined by M. de Blainville, and of which 

 he figured the cervical vertebras, the sternum, and ischium in 

 his ' Osteographie/ t. 3. 



Prof. Schlegel, in his ( Abhandlungen' for 1841, figures the 

 skulls of two specimens which had been received from the Pari- 

 maribo River (t. 5. f. 4-6). The smaller is 12, and the larger 

 13^ inches long. 



Prof. W. Vrolik describes and figures the skeleton of Manatus 

 americanus in the 'Bijdr. tot de Dierkund' for 1851, which is 

 probably the same as that examined by De Blainville and figured 

 by Schlegel. 



Dr. Ferdinand Kraus, in Muller's 'Arch. f. Anat/ for 1858, 

 p. 390, describes the osteology of the Manatees from Surinam, 

 chiefly from the Mariwyne River. In the paper he gives the 

 measurements of seven skeletons and four skulls which had been 

 supplied to different museums, viz. skeletons at Stuttgard, at 

 St. Petersburg, Copenhagen, Tubingen, Wiirzburg (a female), 

 Freiburg, and Berlin ; and skulls at Stuttgard, Tubingen, and 

 Freiburg. The cervical vertebra? in all are 6 ; the dorsal vertebra? 

 vary from 16 to 17, the lumbar from 1 to 3; the caudal vary 

 from 24 to 28 (p. 425). 



Dr. Kraus observes that the length of the nasal cavity, as 

 compared with its width, is subject to great variation, and con- 



9* 



