LEUCICORUS LUSCIOSUS. 147 
the posterior to the end of the snout. Mouth wide, anterior ; jaws equal ; 
maxillary broad and indented on the hinder edge, where it is as deep as 
the orbit, extending little backward of the eye, nearly hidden by the 
expanded suborbitals, Tongue with a median angle in front, edges free. 
Teeth small, equal, in villiform bands on jaws, vomer, palatines, and in the 
the pharyngeal groups. Upper groups on the pharyngeals 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 branch passes below the eye 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 united, free from the isthmus ; 
gill openings wide. Gills four, a short slit behind the fourth ; lamine 
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. Pseudobranchix 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 papille 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. Longitude. Depth. Temperature, Bottom. 
3415 14° 46’ N. 98° 40’ W. 1879 fathoms 36° F. Br, M. glob. Oz. 
