2742 Bulletin 4.7, United States National Museum. 



head; eye If in interorbital width. Rostral tentacle short, with an 

 expanded 3-lobed tip ; front of dorsal midway between base of caudal and 

 occiput; caudal long, rounded, the lower rays more shortened than the 

 tipper, the longest nearly \ width of head ; anal rays high, closely bound 

 together, the fin slender, shaped like the intromittent organ of Gambusia, 

 the length of its base equaling f diameter of orbit, its longest ray reach- 

 ing base of caudal ; pectorals long, the posterior rays rapidly shortened, 

 the longest ^ width of head; head and body everywhere with broadly 

 conical, tubercular plates, varying in size, marked with strong lines, 

 radiating from the center; the apex sometimes blunt, more often provided 

 with a slender spine, sometimes bifid or trifid ; on the tail these spines 

 become longer and are directed backward; plates along edge of disk not 

 compressed nor specially modified. A deep groove-like channel just 

 behind mandible and following curve of latter, becoming continuous with 

 another deeper channel running just below edge of disk to near base of 

 pectorals; a third groove runs backward from nostrils, uniting with the 

 others, these grooves spanned at intervals by pairs of fleshy tentacles 

 with fringed tips, which spring from the edges of the grooves and meet 

 across them ; at the bottom of the grooves under each pair of tentacles is 

 a small fleshy tubercle. Fin rays, at least at base, with series of small 

 curved prickles. Color uniform dusky, the tail sometimes lighter; fins 

 blackish, more or less edged with white. One specimen with the body 

 and tail uniformly light. Pacific coast of Mexico in deep water. Numer- 

 ous specimens, the largest 4| inches long, from Albatross Station 2992, in 

 460 fathoms. (Gilbert.) (spongiosus, spongy.) 



Halieutcea spongiosa, GILBERT, Proc. TJ. S. Nat. Mus. 1890, 124, west of Revillagigedo 

 Islands, at Albatross Station 2992, Lat. 18 17' 30" N., Long. 114 43' 15" W., in 460 

 fathoms. (Coll. Gilbert.) 



1076. HALIEUTELLA, Goode & Bean. 

 Halieutella, GOODE & BEAN, Proc. Biol. Soc. Washington, 1882, 88 (lappa). 



Body subcircular, depressed, its width equal to its length, covered with 

 flaccid, inflatable skin. Spines feebler and less numerous than in Halieutcea. 

 Head merged in body ; forehead with a transverse bony ridge ; no percep- 

 tible supraoral cavity; no tentacle. Mouth small, terminal; lower jaw 

 slightly curved forward. Teeth in the jaws minute, cardiform, not dis- 

 cernible on palate, though possibly present. Carpus broad, slightly ex- 

 serted ; pectoral fins remote from tail, obliquely placed, with membranes 

 subvertical. Branchial aperture posterior to carpus, upon the disk, and 

 not remote from its margin. Gills 2|. Dorsal fin 5-rayed, inserted at 

 junction of disk with caudal peduncle; anal fin 4-rayed, originating at 

 root of caudal peduncle. (dXievrrfp, a fisherman.) 



3126. HALIEUTELLA LAPPA, Goode & Bean. 



D. 5; A. 4; C.9; P. 15; V. 5. Disk subcircular, more than f as long as 

 the body. Body covered with a loose, flaccid, inflatable skin, which so 

 obscure its proportion, that it is impossible to determine its exact height, 



