206 SCIENTIFIC RESULTS OF THE 
(fig. 13, 14), but especially on the margin of the wide, gaping orifice 
and on its inside for a length of about 4.0 mm. (Pl. VII, figs. 2-4), 
with rather crowded and apparently irregularly set claws. The claws 
were very strong and for the most part broad and high (fig. 3, 4), 
even reaching a height of about 0.3 mm. (fig. 4). In the interior of 
the glans, especially in its posterior part (fig. 5c), the claws were less 
broad and simply uncinate or bifurcated, otherwise mostly broader and 
with digitations of the margin. The body of the claws was plain or 
curved; the end simply pointed, bi- or trifurcate or with digitations, 
sometimes very strangely formed. They consisted of a cuticula and 
its matrix; very often, especially on the outside of the glans, the 
cuticula was torn off and the (fig. 20) rounded or pointed naked matrix 
was left. The whitish spherical spermatotheca (Pl. VI, fig. 19a) was 
about 3.5 mm. in diameter, laterally communicating through a short 
- petiolus adhering to tne upper end of the vagina, with a sinuosity into 
which opens the elongate, yellowish spermatocysta (fig. 196), which had 
a length of about 2.0 mm., and from which issues the long duct of the 
mucous gland (fig. 19¢). The grayish vagina very strong (fig, 18e), 
about 7.0 mm. long, elongate-conical ; the lowest part wide, having a 
diameter of about 3.25 mm.; the walls thick, with a very peculiar 
internal lining, consisting of cylindrical palisades (Pl. VII, fig. 6-8) 
of a height of about 0.4 by a greatest diameter of 0.07—0.08 mm. ; 
between the larger were seen smaller and very small ones. The pali- 
sades seemed to be densely clothed (fig. 8) with cilia, and showed a 
nearly colorless axis (fig. 6, 8) up to their points ; the axes were often 
denuded (fig. 6) after the sheath has been torn away. ‘This lining 
continued up to the superior end of the vagina, but not beyond it. 
The mucous gland large, whitish, and yellowish-white ; the anterior 
half yolk-yellow, denuded on the fore-end of the genital mass ; the duct 
short. 
A variety (Pl. VI, fig. 14-20) of this species has also been found 
by Dall, in July, 1873, at low water, in Kyska Harbor (Aleutians). 
According to Dail the color of the living animal was “yellowish.” The 
animal preserved in spirits was of.a uniform light yellowish color. ‘The 
leneth about 18.0 mm. by a breadth reaching 8.0 mm. and a height of 
6.0 mm.; the breadth of the foot at the fore-end 5.0 mm., the margin 
of the mantle freely projecting 1.5 mm.; the height of the rhinophoria 
1.5 mm., of the branchial leaves 1.6 mm. Around the plain margins 
of the rhinophor-holes seven to nine large conical tubercles ; the club 
of the rhinophoria with about twenty leaves Around the branchial 
