44 NILS HJ. ODHNER, MOLLUSCA. 
FAM. TROCHIDAE. 
Trochus fenestratus Gmetin. 45 miles W. 8S. W., 60 feet (°/7), 1 sp., h. 31 
mm. The species differs from 7. architectonicus in having considerably Jower and 
distant tubercles (about 17 on a turn of the last whorl) — 7’. architectonicus has 
about 40 — and 5 distinct spiral lines of small tubercles on the last whorl. The 
interstices between the large tubercles are red in the present specimen. Distribution: 
Indian Ocean to Philippines, Viti Isl., Queensland (Pitspry 1889, HrpLey 1910). 
Euchelus atratus Gmevin. 45 miles W. S. W., 66 feet (*°/7), 5 sps, max. 1. 17.5 
mm, overgrown with a spongia; a small sp., h. 6.4 mm, not full-grown, deep rose, still 
only a very small, scarcely visible rudiment of a columellar tooth; 42 miles W.8. W., 
Fig. 8. Radula of Euchelus mysticus Pirspry. X 320. 
66 feet (''/7), 2 sps, max. h. 7, the one marbled with brown, the second grayish 
yellow-red; tooth very feeble but distinct. — 42 miles W. 8. W., 42 feet, 1 sp., 
h. 16 mm. — Distribution: Karachi (Metvitt & SvtanpEN 1901); Red Sea, Indian 
Ocean (EK. A. Smiru 1891); Philippines; Viti Isl. (Pruspry 1889); Queensland (HEDLEY 
1910); Victoria (PRircHARD & Gariirr 1901), N. W. Australia (Brazier 1885). 
E. mysticus Pitssry (PI. 2, figs. 38, 39; text fig. 8). 45 miles W. 8. W., 66—70 
feet (*/c, 7°/7), 2 sps, max. h. 12.6, br. 13, and h. 11.6, br. 13.2 mm; whorls 5. They 
agree, though of smaller size, with the description and figure given by PILsBry 1889 
(Man. of Conch. 11, p. 444, pl. 57, fig. 7). The specimen described by PILSBRY was 
from Singapore. 
The animal has an epipodial lamella all round the foot, with dense digitiform 
processes in its edge; the head bears two fringed lobes between the tentacles, which 
are set off from the body by their black colour; eyes pedunculate at the outer sides 
of the tentacles. 
