PSEUDORCA CRASSIDENS. 145 



and ill tlie smaller number of teeth; the premaxillary bones are rehx- 

 tively narrower throughout the greater part of their length."* As re- 

 gards the breadth of tlie beak anteriorly, it should be stated that the 

 skulls of P. meridionaUs described prior to the date of Professor Cope's 

 writing were young, while the beak under consideratiou is from an old 

 individual, as is shown by the partial anchylosis of the preiuaxilhe witli 

 the maxilUe, and the worn condition of the teeth. The teeth in this 

 specimen are ^^g, and exceed, therefore, the number in one of the speci- 

 mens of P. meridionaUs (Xo. 2'J84) in the Uoy.il College of Surgeons, in 

 which the number is |]|. ^s regards the posterior tooth " being the 

 last of the luaxillaries, instead of the uiandibulars, a-j iu merldionalis,^^ 

 I do not think any cetologist would insist upon this as a specific char- 

 acter. The last maxillary tooth was evidently the farthest back in the 

 skull from the northeast coast in the National Museum, and is so in 

 the skull figured by Van Beneden and Gervais {Osteog., Pi. L, figs. 8 

 and Sa). 1 can not regard the specimen as other than P. crassidens. 

 The proportions of the mandible and beak are as follows: 



Measurements of No. 3G79. Off Paita, Peru. 



Inches. 



Greatest length of mandible 20. 75 



Length of symphysis 3. H 



Length of tooth row 9. 



Depth between angle and coronoid process G. 1 



Breadth of beak in front of third tooth (counting from posterior end of row).. 8.25 



Breadth of intermaxilhu at same point 5.6 



Length of tooth row 8. 4 



Glohioceplialus Orayi Burraeister. 



Gervaist and Keinhardtf have already expressed their belief in the 

 identity of this species with P. crassideiis, and there is apparently no 

 reason for dissent from their opinion. It has one tooth more above on 

 each side than is comjnon, and all the teeth are very much worn, though 

 the skull differs in length from No. 10320 in the national collection by 

 only three-tenths of an inch. In the characters pointed out by Bur- 

 meister in his monograph as peculiar to this skull, it agrees with the 

 specimens of P. crassidens which I have examined. 



Pseudorca ? mediterranea Giglioli. 



Professor Giglioli describes in the Zoologischer Anzeiger (v, 1883, p. 

 289) under this name a species found in the Mediterranean. 



He gives, however, no characters by which its relationships can be 

 determined. The teeth are If or {^. The total length of the skull in the 

 Koyal Zoological Museum in Florence is Gl"^'" long; its greatest breadth 

 is 46'"". 



* Proc. Acad. Nat. Sci. Philadelphia, 1866, p. 293. 



t Gervais, Jonrn. de Zoologie, i, p, 68; Journ. de Zoologie, il, p. 36. OstiSographie 



dos C6tac6s, p. .548. 

 t Reiuhardt, Videns. Meddel. Natur. Fureuing. 



18378— Bull. 3G 10 



