Carapuse 27 
Habitat.—In the intestine of Holothuria monacaria (Lesson); Boshuu; Misaki, 
Prov. Sagami; Uraga. 
Head g#, height of body at insertion of anal 14 in total length. Eye 42, 
interorbital 47, snout 43, maxillary 2} in head. 
Body long and siender like of an eel but compressed, tapering toward the long 
and slender tail. Head rather small, slightly higher than wide ; eye moderate, level 
with dorsal border in profile ; interorbital broadly convex ; snout sharpy pointed when 
viewed from side, but rather broadly rounded when viewed from above. Mouth 
subinferior ; lower jaw slightly included ; maxillary extending to vertical through the 
posterior rim of eye. Jaw teeth small, pointed, in one row; palatine teeth slightly 
larger, arranged likewise in a single row; vomerine teeth slightly larger than the 
palatine, in a narrow band of about four longitudinal rows. Dorsal inserted behind 
pectoral ; distance from lower end of base of pectoral to origin of dorsal equal to that 
from the former to tip of snout ; height of the fin along the rays at the end of the first 
third of dorsal equal to diameter of eye. Anal inserted behind pectoral, at vertical 
through the middle of its length, the height along the rays at its highest part equal 
to length of postorbital part of head. Pectoral small, somewhat low in position, 

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Et 
