LEUCICORUS LUSCIOSUS. 147 



tlie posterior to the end of the snout. Mouth wide, anterior ; jaws equal ; 

 niaxilhiry broad and indented on tiie hinder edge, where it is as deep as 

 the orbit, extending Httle baelavard of tlie eye, nearly hidden by the 

 expanded suborbitals. Tongue with a median angle in front, edges free. 

 Teeth small, equal, in villiibrm bands on jaws, vomer, palatines, and in the 

 the pharyngeal groups. Upper groups on the jjharyngeals large ; vomerine 

 band V-shaped, rather deep on the median line with arms curving back 

 and sidewise. Opercular spine small, hidden. The head is well covered by 

 the mucous or light-producing cavities ; a large area occupies the inter- 

 orbital and internarial spaces ; a branch from this passes back at each 

 side of the occiput and nape above the opercle where it ends in an ear- 

 like flap ; another brancli passes below the e\-e on each side from the 

 nostrils to the preopercle, and a wide series of chambers passes back under 

 each lower jaw and up on the properculum to end behind the eye. 

 There are eight cavities in either maxillary or mandibular series, and six 

 in each suborbital. Gill membranes not imited, free from the isthmus ; 

 gill openings wide. Gills four, a short slit behind the fourth ; lamintB 

 short ; rakers slender, about nine with four rudiments on the lower sec- 

 tion of the first arch, and four rudiments on the upper portion, longest 

 equal height of orbit. Pseudobranchite a pair of rudiments on each side. 

 Dorsal origin above the axil of the pectoral ; anal origin below the nine- 

 teenth ray of the dorsal. Caudal united at the base with dorsal and 

 anal, narrow, elongate, three fifths as long as the head, acute. Pectorals 

 small, simple, less than half as long as the head, lower rays weaker and 

 connected by membrane with the balance of the- fin. Ventrals small, 

 slender, filamentary, each composed of two rays bound together, situated 

 close to one another at the humeral symphysis. Distance from ventral 

 bases to vent about equal to length of head. No pyloric caeca. Small 

 sensory papillae on the snout at the openings of the vessels more devel- 

 oped than in Mixonus. 



Color in alcohol brownish, but numerous remnants of red or crimson 

 over head and body indicate that in life the animal was red or purplish. 

 White areas, the mucous channels and cavities, cover the head, and may 

 have been light producers. 



Length of specimen described eleven inches. 



station. Latitude. Longitua.,'. Depth. Temperature. Bottom. 



3415 14° 40' X. 98° 40' W. 1879 fatlioiiis 30° F. Br. il. glob. Oz. 



