140 Zoological Society : — 



The new species may be described as follows : — 



The specimen was .52 inches, measured along the side from the 

 end of the nose to the notch in the middle of the tail. The front 

 edge of the dorsal fin is 23 inches from the tip of the nose, measured 

 over the arch of the back ; the hinder edge of the dorsal fin, mea- 

 sured in the same manner, is 22 inches from the notch in the tail. 

 The front edge of the base of the pectoral fin is I) inches from the 

 end of the nose ; and the fin itself is i) inches long, measured along 

 its front margin. The tail is 13 inches wide, measured across the 

 hinder edges ; the lobes are rounded, and rather overlap each other 

 at the central notch. 



The hinder part of the back, the whole of the dorsal fin, and the 

 upper and lower surfaces of the pectoral and caudal fins are black ; 

 the head, the lower lip, the front part of the back, and the sides to 

 the base of the pectoral fins are greyish black ; the upper parts of 

 the sides of the body behind the pectoral fins are grey, more or less 

 mottled with a darker shade ; the chin, throat, chest, belly, and 

 under parts of the body white. The upper and lower jaws are of 

 the same length. The upper lip covers the edge of the lower one, 

 the covered part being pale-coloured, flattened, and gradually shelv- 

 ing in towards the upper margin. There are two minute pits (which 

 may have been the places from which whiskers arose) in the upper 

 part of the upper lip, situated about where the depression is placed 

 that separates the beak from the head in those genera which have 

 the beak marked. 



The dorsal fin is scarcely falcate, with a rather broad, rounded 

 upper margin, which is armed with a single series of distinct com- 

 pressed tubercles ; the tubercles have an oblong base, with a slightly 

 raised conical centre, and the surface is covered with irregular radia- 

 ting wrinkles. Those on the front part of the edge are largest, and 

 separate from one another ; they diminish in size and become crowded 

 near the hinder upper part of the fin, forming a ridge which is hard 

 and serrated to the touch. 



The skull is much like that of Phoccena communis in size, general 

 form, and in the number, disposition, form, and size of the teeth ; but 

 it differs from the skull of that species in the heak of the skull being 

 rather narrower, more tapering in front. The foramen maximum is 

 narrow, much higher than wide, and the condyles larger; while iu 

 P. communis the foramen maximum is nearly circular, and the con- 

 dyles smaller and more oblique. The symphysis of the lower jaw is 

 longer, and the sloping lower edge is more oblicpae and considerably 

 longer than in P. communis. 



A skeleton is being formed of the bones of this animal ; and the 

 skin has be,n preserved in spirits, which is certainly one of the best 

 ways of preserving the specimens of Cetacea, as it allows the outer 

 surface to be examined at any future time in a state most nearly 

 resembling that of living specimens. 



