1856.] 255 



Obs. This bird was given in Mr. Peak's volume on the Birds and Quadrupeds 

 of Capt. Wilkes's Expedition, as Zapornia spilonota, Gould, but though very pro- 

 bably of the same genus, is distinct, and we have not found it described. 



T. Tachypetes Palmerstoni, (Gmelin.) 



Pelecanus Palmerstoni, Gm. Syst. Nat. i. p. 573, (1788.) 



Obs. This is a species quite distinct from T. aquila, and is apparently exclu- 

 sively an inhabitants of the Pacific Ocean. From that species the present bird 

 may readily be distinguished by its much larger gular pouch, which in the 

 living bird is of a red color. Its quills and tail feathers are much narrower and 

 the latter is longer. So far as can be determined from preserved specimens, the 

 two species are nearly of the same size, thongh the present bird is the more 

 slender. 



Numerous specimens are in the collection of the Exploring Expedition, 

 (Vincennes and Peacock.) 



Notices of Remains of Extinct Vertebrated Animals discovered by Professor E. 



Emvions. 

 By Joseph Leidt, M. D. 



Cetacea. 



1. Orycterocetus cornctidens, Leidy. 



0. quadratidens, Proc. A. N. S. VII, 378. 



The genus was originally proposed 6n several long horn-like teeth, together 

 with fragments of jaws found in the miocene deposit of Virginia. Prof. Em- 

 mons has also discovered a tooth, apparently of the same species, in the mio- 

 cene deposite of North Carolina. The tooth bears a wonderful resemblance to 

 the horn of a young ox. It is nearly 5 inches long in the curve and over an 

 inch in diameter at base, which is hollowed into a deep conical cavity, as in 

 the spermaceti whale. 



Sauria. 



2. Drepanodon impar, Leidy. 



This species is founded on the crown of a tooth discovered by Prof, Emmons 

 in the miocene deposit of Cape Fear, North Carolina. 



The specimen, in form, bears a strong resemblance to the crown of the in- 

 ferior canine tooth of a bear, but it has only one trenchant ridge, and this is 

 situated postero-internally. The enamel is thin and smooth ; the base of the 

 crown is hollowed conically. Length of specimen 10 lines; breadth at base 

 antero-posteriorly 7 lines, transversely 5 lines. 



3. Pliogonodon priscus, Leidy. 



Founded on two much mutilated specimens, consisting of the crowns of teeth, 

 discovered by Professor Emmons in a miocene deposite of Cape Fear, in North 

 Carolina. 



Teeth elongated conical, nearly straight or only slightly curved inwardly, in 

 section circular, with a pair of opposed carinaa on the inner side ; surfaces 

 divided into numerous narrow planes, with a few vertical interrui^ted plicae, 

 which are more numerous on the inner side, ^namel finely wrinkled ; and the 

 dentine concentric. Base of crown hollowed. Probable length of crown when 

 perfect 2 inches, breadth of base |- of an inch. 



The teeth differ from those of 3fososaurus in their narrower proportion, 

 straightness, circular section, and plicae of the enamel ; from those of Polypty- 

 cliodon in the possession of divisional planes and opposed carinag ; and from 

 those of Pleiosaurus in the former character and the circular section. 



4. Pal-5:osaurus ? (Compsosaurus) priscus, Leidy : ante p. 165. 



Half a dozen isolated teeth of this saurian are contained in the collection of 

 Prof. Emmons. 



