28 G. 0. SARS. [SEC. ARC, EXP, FRAM 
Fam. Diosaccide. 
104. Amphiascus nasutus, Boeck. 
This form occurred rather abundantly in several of the bottles. 
105. Amphiascus latifolius, G. O. Sars, n. sp. 
(Pl. VIL). 
Specific Characters. — Female. Body moderately slender 
and slightly tapering behind, with the anterior division oblong oval in 
form. Cephalic segment, excluding the rostrum, about the length of 
the 3 succeeding segments combined; rostrum well developed, lanceolate. 
Urosome somewhat shorter than the anterior division, last segment 
comparatively short, scarcely half as long as the preceding one. Caudal 
rami broader than they are long, and transversely truncated at the tip, 
inner medial seta conspicuously dilated for some part of its length, 
and about as long as the urosome. Anterior antennz of moderate 
length and consisting of 9 well-defined articulations, the first four gra- 
dually diminishing in size, terminal part about half the length of the 
proximal one. Posterior antenne and oral parts of the usual structure. 
1st pair of legs with both rami pronouncedly prehensile and rather 
slender, the outer one fully as long as the 1st joint of the inner, last 
joint very short, spatulate in form, and armed with 3 strong claws gra- 
dually increasing in length distally and accompanied outside by a thin 
bristle, inside by a slender geniculate seta; inner ramus with the 1st 
joint linear in form and having inside, at a short distance from the end, 
a comparatively short seta, outer 2 joints very short and subequal in 
size, the last one armed with 2 slender claws of unequal length. Nata- 
tory legs well developed, with the full number of sete. Last pair of 
legs comparatively large and pronouncedly foliaceous, distal joint of 
unusual size, rounded quadrangular in form, and provided with 6 rather 
slender sete, one of them, issuing from the tip, very thin, hair-like; 
inner expansion of proximal joint triangular and extending about to the 
middle of the distal joint, marginal sete 5 in number, the 2 outermost 
closely juxtaposed. Ovisacs of moderate size and oblong oval in form. 
Male with the anterior antenne hinged in the usual manner. 
Inner ramus of 2nd pair of legs conspicuously transformed, but rather 
unlike that in the other known species, middle joint faintly defined from 
the last, and without any spiniform appendage outside, last joint pro- 
vided at the tip with a short spine and a slender seta, having more- 
over inside an ordinary seta, and outside near the end a short, peculiarly 
