EXPLORATION OF ALASKA. 931 
The eyes with black pigment ; the otocysts with not very many and 
not much calcified otokonia. No distal olfactory ganglion, as far as 
could be seen; no spicula in the leaves of the rhinophoria. The skin 
as in other species ; the spicula projecting on the surface of the granu- 
lations of the back. 
The bulbus pharyngeus about 1-1.5 mm. in length; the sheath of 
the radula projecting 0.75-1.0 mm., bent upwards ; the sucking-crop a 
little larger than the bulbus itself, short-stalked ; the lip-disk as usual. 
The tongue compressed, rather prominent, with six, eight, and nine 
rows of teeth, also further back twenty-four, thirty-two and thirty-three 
developed and three younger rows; the total number of rows thus 
being thirty-five, forty-one, forty-five. The median plates, the large 
lateral and the (fifteen) external ones searcely different from those of 
the last species. 
The salivary glands rather strong, with two or three short coils fill- 
ing the space at the sides of the esophagus (fig. 4), white. The 
cesophagus (fig. 4a) wide in its upper part, the rest narrow. The an- 
teriorly proceeding part of the intestine 2.0 mm. long, the other retro- 
ceding part &.0 mm. long; no biliary sac could be found either at the 
pylorus or higher up. The liver about 9 0 mm. long by a breadth of 
4.2 and a height of 4.0 mm. ; of brownish-gray color ; the anterior end 
truncate, inclined downwards and backwards ; the anterior one-third of 
the right side flattened for the anterior genital mass ; the posterior end 
somewhat pointed, rounded at the point. 
The sanguineous gland whitish, covering the anterior end of the 
bulbus pharyngeus and the foremost part of the central nervous system 
or this last and the hinder part of the bulbus. 
The anterior genital mass about 3.5 mm. long by a breadth of 0.75 
and a height of 1.5 mm., a very large part of it formed by the thick 
part of the spermatoduct. The ampulla of the hermaphroditic duct 
about 2.0 mm. long, rather thin, whitish. The spermatoduct long; 
the first part thinner, about 8.0 mm. long; the rest making a large 
curve, about 5.5 mm. long, about three times as thick as the first, with 
a diametér of 0.6 mm. ; the spermatoduct proper making many coils in 
its interior course downwards to the penis, which shows a little un- 
armed glans in the bottom of its orifice ; in one individual the penis 
was exserted as a conical prominence of the beight of 1.0mm. The 
spermatotheca pyriform, about 1.0 mm. long, of grayish color; the 
spermatocysta a little less large, spherical; the vagina rather short. 
The mucous gland rather small. 
