452 NEW BATHYBIAL FISHES— GOODE AND BEAN. 



Ventrals absent. Gill opening' inunense, the membranes deeply cleft, 

 free from the isthmus. Gills .'>. Pseudobranchiiie absent. 



C E T O M I M U S , ]iew genus. 



Body oblong, compressed, scaleless; similar in its vertical outline 

 and proportions to that of the right whales (Bahenida^.), a resemblance 

 whicli is greatly enhanced by the shape of the enormous mouth, and in 

 the lower jaw strongly curved, projecting slightly beyond the snout. 

 Teeth in granular bands, covering all the bones of the mouth, tongue, 

 and throat. Mucous pores sometimes present on the back. Kostrils 

 far forward, open slits without Hap. Byes very small, and placed far 

 below the dorsal profile. Gill-membranes deeply cleft, not attached to 

 the isthmus. Gill-rakers absent, replaced by granular tooth-like .sur- 

 face upon the arch. Gills 3; no slit behind the third. Branchiostegals 

 9. Opercular api^aratus incomplete, bones thin and membranous. 

 Dorsal short, high, inserted very far back, directly opposite the annl, 

 which it resembles in shai^e and size. Caudal peduncle short and 

 slender. Ventrals absent. Pectorals broad and short, placed low. 

 Caudal small, weak, probably emarginate or truncate. Lateral line 

 broad, consisting of two furrows connected vertically by numerous 

 short cross-grooves. 



CETOMIMUS GILLII, new sjiecies. 

 Plate XVII, flg. 2. 



The height of the body is a little less than one-fourth of the total 

 length; length of head a little less than one-third. Eye minute; con- 

 tained about 23 times in the length of head, and about eight times in that 

 of snout; inserted midway between the margin of the jaw and the 

 dorsal profile, distant from the former a space contained about 2^ times 

 in the length of the snout. The maxillary reaches very far back, 

 extending to a point behind the orbit equal to 1^ times the length of 

 the snout. The origin of the dorsal is directly above that of the anal, 

 which is inserted a short distance behind the vent; distance from the 

 snout equal to more than four times the length of its own base, and 

 the distance of its termination from the root of the upi)er rays of the 

 caudal equal to its own greatest height. The anal fin is similar in 

 shape and extent to the dorsal, but has the thirteenth to the fifteenth 

 rays the longest, while the eighth to the eleventh are the longest in the 

 dorsal. The length of these longest rays is about equal in the two tins, 

 and is contained slightly less than three times in the length of the 

 head. The pectoral fin is inserted somewhat below the middle of the 

 body and close to the extremity of the opercular flap. It is broadly 

 lanceolate, and its length is contained about 3i times in that of the 

 head. Ventrals lacking. Color, blue-black. The lateral line sweeps 

 in a bold curve from a point above the upj^er angle of the gill-opening 

 to a point in the middle of the body between the origin of the dorsal 



