PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 205 



40"""; the stem, 70™"'; the body, llO""; diameter of the stem, 10'"'"; of 

 the body, 20""'"; length of lateral processes, ^G"""'; their diameter in mid- 

 dle, 3'""' to 4'"'". The smallest specimen seen has the stem 40'""' long; the 

 body, 30'"'" long; diameter of the stem, 5'""; of the body, IS™""; length of 

 lateral processes, up to 20"'™. 



Numerous specimens of this very remarkable sponge have been 

 brought in by the halibut fishermen from the deep-watei* fishing grounds 

 off Nova Scotia, during the past year, and presented to the U. S. Fish 

 Commission. Two of the best were taken by Captain McCormick and 

 crew, of the schooner " Wachusett," in 180 fathoms, N. hit. 43° 17', W. 

 long. 60° 58'. Several specimens have been presented by Capt. J. W. 

 Collins and crew, of the schooner "Marion," from Banquereau. 



New Haven, Conn., October, 1879. 



DEHCRIPTIOX OF A IVEl^V OETVUS AIVD SPECIES OF FISH, I.OPIIO- 

 liATIIiUS CHAM^liEOIVTlC'EPS, FROin THE SOUTH COAST OF 

 1VE\F EIVGltAND. 



By O. BROIYN GOODE and TARI.ETOIV H. BEAK. 



A few days ago Captain William H. Kirby, of Gloucester, Massachu- 

 setts, took 500 pounds of a remarkable new fish on a cod-fish trawl in 

 lat. 40O N., Ion. 70° W., at a depth of 84 fathoms, 80 miles south by 

 east of Noman's Land. One of these was forwarded by him to the 

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

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

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

 pounds. 



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

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

 vertical fins and other characters to the genus Latilvs as restricted by 

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

 upon the nape, resembling the adipose fin of the Salmonidce, and by a 

 fleshy prolongation upon each side of the labial fold extending back- 

 ward beyond the angle of the mouth. For this genus we propose the 

 name Lopholatilus. 

 Lopholatilus chamaeleonticeps sp. nov. 



Description.— The greatest height of the body (.306), w^hich is at the 

 ventrals, is contained about 3.^ times iu the length to the origin of the 

 middle caudal rays, and 4 times in the extreme length. Its greatest 

 width (.144) equals the length of the caudal peduncle (.144) ; this latter 

 being measured from the end of the soft dorsal to the origin of the mid- 

 dle caudal rays. The least height of the tail (.0807) is contained 4 times 

 in the distance of the spinous dorsal from the snout. 



The greatest length of the head (.33) is contained 3 times in the length 

 to the origin of the middle cau(hil rays. Its greatest width (.105) 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 end of flap 



