304 DELPHINIDJS. 



** Dorsal fin, in middle of hack, with a series of spines on its iipper edge. 

 Teeth all compressed, truncated. 



2. Phocsena tuberculifera. 



The dorsal fia with a series of spines on the upper portion of the 

 upper edge. Body and upper parts of the pectoral and caadal fins 

 black, chin and beneath whiter. 



Maraouin, Camper, Planches de Cetac6s, t. 45-51. 



Phocsena commimis, Jackson, Boston Journ. N. H. 1845, v. 167. t. 



(anatomy). 

 Phocasna tuberculifera, Gray, Proc. Zool. Soc. 1865, 320. 



Inhab. Margate. North Sea. Coast of North America : Boston 

 (Jaelcson). 



a. Skin in spirits. Margate. The animal described P. Z. S. 1865. 

 h. Skeleton of above. 



When I described this species from a specimen caught at Margate, 

 which liyed a few days in the Zoological Gardens, Eegent's Park, 

 I was not aware that it had been noticed by PHny, figured and 

 described by Camper, or that Dr. Jackson had mentioned the tubercles 

 on the dorsal fin in the specimen which he described. Mr. Plower 

 kindly pointed out to me the two references. 



This explains why Dr. Jackson did not find his anatomy to agree 

 with Cuvier's. They were evidently made on two different species. 



It is not flattering to the accuracy of our research that two kinds 

 of porpoises should be found to inhabit the English seas and be 

 overlooked until now. 



Camper, at p. 142, observes, " La fausse nageoire est plaeee sur le 

 milieu du dos, son bord anterieur est armd de petites asperites den- 

 telees, qu'on n'observe pas dans le Dauphin vulgaire. PHne en a 

 parl^ sons le nom de spina culteUata." 



Dr. Jackson observes, " Dorsal fin emarginated ; hack of the tip 

 and at the upper part anteriorly is exhibited quite a number of small 

 tubercles or dentations." 



Camper figures the male foetus and the sexual organs of a female 

 foetus. He states that the outer auditory opening was closed in the 

 female and open in the male ; he also says there were two small 

 apertures on one side of the nose and three on the other in the male 

 foetus {I. e. p. 213). 



Camper figures the female and its anatomy (I. c. tab. 45-49). 



**• Dorsal fin rather posterior; back, in front of the dorsal fin, with a single, 

 and upper edge of the dorsal fin unth three series of oblong keeled 

 tubercles. Front teeth rather conical. Acanthodelpnis. 



3. Phocsena spinipinnis. 



Lead-coloured. Teeth -^ . -Lfi. 



Phocsena spinipinnis, Surmeister, Proc. Zool. Soc. 1865, 228. f. 1-4. 



Inhab. Eio de la Plata, near the mouth. Mus. Buenos Ayres 

 (Burmeister). 



