CATODOMID^. 195 



A. Abstnls longUwlinal, paralM or dwcn/imi, covered with a valve, one often 

 larger and more developed. Pectoral broad, truncate. Fmners 5. 

 1 h.vseteroidea. ^ 



Family 3. CATODONTIDiE. 



Head large, subcyliiidrical, blunt. Lower jaw narrow. Teeth 

 large, in the lower jaw only, fitting into pits in the gums of the 

 upper one. Nostrils separate, one often abortive. The liinder edge 

 ot the maxillary elevated, forming a concavity on the forehead of 

 T^ ^r ; Pectoral broad, truncated. Fingers 5. Eye and Hmb 

 ot left side smaller ; left nostril very large. The lower jaw is early 

 joined in front into a subcylindi-ical mass ; the branches converge 

 and nearly straight. 



Delphinia Catodonia (pars), Rajin. Anal. Nat. GO, 1815. 

 Cete Camivom (pars), Lesson, K E^g. Anim. 201 

 Physetei-ere, Lessoii, N. Mg. Anim. 201. 

 Zahnwalle (pars), Oken, Lehrb. Naturg. 672, 1815. 

 Physeterida3 seu Hypodontia, J. Brookes, Cat. Mm. 38, 1828. 

 Catodon, Artedi, Gen. Piscium, 78. Ichth. 

 Les Cachalots, Duvernoy, Ann. Set. Nat. 1851, 2.3 

 Catodontidc-e, Grag, Cat. Cetac. B. M. 1850, 44: P. Z & 18G4 231 ■ 

 MncLeag, New Sperm Whale, 1851, 63. ' ' 



Physeteriens, Geoff. Leqom, Mamm. 1835, 66. 

 Der Cachalots (Physeter), Schler/d, Abhandl. 24. 

 Physeteridffi, Oicen, Cat. Osteol.' 3Ius. Coll. Surg. ii. 442. 



" Upper surface of massive skull concave for the reception of sper- 

 maceti. Nostrils enormously disproportionate in size, the left one 

 the largest. The nasal bones as well as those of the face generally 

 unsymmetrical and chstorted. Elowhole externally single (in aU') 

 Branches of the toothed lower jaw united in front by a bony sym- 

 physis, which is always considerably narrower than the toothless 

 upper jaw. Teeth of the under jaw conical, hoUow, Hke those of a 

 crocodile, and fitting into cavities formed in the gum of the UDuer 

 jaw."— il/«cZern/, 7. c. p. 63. ^^ 



" The Cachalots or ' Sperm Whales,' Catodontida; of Dr. Gray I 

 humbly consider to constitute a subfamily rather of DeJphiJdce 

 especially since the discovery of that verj- remarkable small species' 

 the Eaphysetes Graii of Mr. W. S. ^YaW'—Bh/th. Mr W S Mac ' 

 Leay discusses this question in his ' History "and Description of a 

 new Sperm \\liale,' set up by Mr. W. S. Wall. 



Synopsis of the Geneba. 



I. Ile(ul coinjn-essed, truncated in front. Blowers in front of imner nart 

 of head. Skidl elongate. Dorsal hump rounded ■' ^^ ^ 



1. Catodox. 



o2 



