28 G. 0. SARS. [SEC. ARC. EXP. FRAM 



Fam. Diosaccidse. 



104. Amphiascus nasutus, BOECK. 



This form occurred rather abundantly in several of the bottles. 



105. Amphiascus latifolius, G. 0. SARS, n. sp. 



(PI. VII). 



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 antennae 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 antenna? 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 setae. Last pair of 

 legs comparatively large and pronouncedly foliaceous, distal joint of 

 unusual size, rounded quadrangular in form, and provided with 6 rather 

 slender setae, 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 setae 5 in number, the 2 outermost 

 closely juxtaposed. Ovisacs of moderate size and oblong oval in form. 



Male with the anterior antennae 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 outsi'de near the end a short, peculiarly 



