240 REPOR'i OF COMMISSIONER OF FISH AND FISHERIES. [4] 



N., longitude 70° W., at a depth of 84 fatboms, 80 miles south by east 

 of Nomau's Land. One of these was forwarded by him to the Unit-ed 

 States National Museum, and forms the type of a new genus and spe- 

 cies. The single individual secured (No. 22899, Earll 342) is 33 inches 

 long. The largest one taken, according to Captain Kirby, weighed 50 

 l)Ouuds. 



" The species appears to be generically distinct from the already de- 

 scribed species of the family LatilidcB Gill. It is related by its few- 

 rayed vertical fins and other characters to the genus Latilus as re- 

 stricted by Gill, but is distinguished by the presence of a large adipose 

 appendage upon the nape, resembling the adipose fin of the salmouidse, 

 and by a fleshy prolongation upon each side of the labial fold extend- 

 ing backwards beyond the angle of the mouth. For this genus we 

 propose the name Lopholatilus. 



''LOPHOLATILUS CHAM^LEONTICEPS, Sp. nov. 



"Description. — The greatest height of the body (.306), which is at 

 the ventrals, is contained about three and one-half times in the length to 

 the origin of the middle caudal rays, and four times in the extreme 

 length. Its greatest width (.144) equals the length of the caudal pe- 

 duncle (.144) ; this latter being measured from the end of the soft dorsal 

 to the origin of the middle caudal rays. The least height of the tail 

 (.0867) is contained four times in the distance o£ the spinous dorsal 

 from the snout. 



" The greatest length of the head (.33) is contained three times in the 

 length to the origin of the middle caudal rays. Its greatest width 

 (. 16.^3) is slightly more than twice the width of the interorbital area (.08). 

 The length of the snout (.122) is contained twice in the length of the 

 pectoral of the right side (.244). The length of the operculum to the 

 end of the flap (.11) is one-ninth of total length. The length of the up- 

 per jaw (.15) equals one-half of the height of the body at the ventrals, 

 and is contained two and one-half times in the length of the head. The 

 maxilla extends to the perpendicular through the anterior margin of 

 the orbit ; the mandible does not quite reach the perpendicular through 

 the middle of the orbit ; the length of the labial appendage is slightly 

 more than half of the long diameter of the orbit and one-third of 

 the length of the first pectoral ray. The length of the mandible 

 (.156) slightly exceeds the distance from the snout to the orbit (.15), 

 and equals three times the long diameter of the eye (.052), which is 

 contained six and one-half times in the length of the head. The oper- 

 culum and preopercnlum are scaly ; the latter is finely denticulated on 

 its posterior margin.^ The distance of the i)osterior nostril from the eye 

 ecpials the length of the first anal !s])ine; the distance between the an- 

 terior nostril and the end of the snout is twice as great. The inter- 

 maxillaries are supplied with an outer series of nineteen canine teeth, 

 and behind these a band of viliform teeth, widest at the symphysis; 

 vomer and palatiiies toothlefjs. 



