NO. 1244. OOBIOID FISHES OF JAPAN— JOIWAN AND SNYDER. 127 
small, but distinct, the interorbital space elevated; a pit above the 
opercle, opening into a cavitv which is separate from the gill cavity. 
Dorsal fin continuous, verj^ long and low, of 6 short spines and 40 
to 60 soft rays; soft dorsal and anal continuous with the pointed 
caudal; pectoral fins small; ventral fins very small, I, 4, more or less 
fully united, but usually notched at tip. Vertebrae 10 + 24 = 34. 
East Indies, north to Japan. Slender, eel-shaped gobies, remark- 
a)>le for the cavity above the opercle. 
(rpvTnf, hole; cyvxf}v, nape.) 
56. TRYPAUCHEN WAK^ Jordan and Snyder, new species. 
Trypauchen vagina Steindachner, Reise Schiff Aurora, 1898, p. 220, Kobe (not 
of Schneider). 
Head ♦>! in length; depth 8f ; eye Hi in head; interorbital space 
6f ; snout 4; maxilliar}' 3; D. VI, 52; A. 40; scales in lateral series 
55, in transverse series about 12. 
Body very long; greatly compressed. Head short, as wide and 
deep as body; its dorsal part, posterior to eyes, with a sharp, bony crest. 
Eyes very small, directed obliquely forward; interorbital area conA^ex; 
I. ' •• • ► « s » v., .■' » T i 
Fig. 32.— Trypauchen wak.e. 
space between the eyes about equal to twice their diameter. Snout 
short, blunt; lower jaw projecting beyond the upper. Mouth oblique. 
Maxillary concealed, extending to a vertical through anterior edge 
of orbit. Teeth in 2 rows, simple, the outer ones enlarged; no ca- 
nines. Gill opening not extending far forward; the isthmus broad, its 
width contained about 3 times in head. No papilla? on inner edge of 
shoulder girdle. Gill-rakers reduced to mere elevations on the arch. 
Anterior nostrils with distinct tubes. Deep pit at upper edge of 
opercle, about as long as eye. No barbels. 
Head naked; the skin with many mucous pores. Body with small, 
thin, round, cycloid scales; nape to front of dorsal and breast to 
beyond tip of pectoral and ventral naked; belly nearl}' back to vent 
naked, or with a few scattered scales. 
Dorsals connected; the spines short and strong; the rays slightly 
longer than the spines; anal rays as high as those of dorsal; both 
dorsal and anal connected with caudal. Caudal pointed. Pectoral 
acutely rounded above; the lower rays shortened, its upper edge 
without free filaments; its length 3i in head. Ventrals very small, 
5 in head, free posteriorly; the tip of the unit(^d fin notched. 
