96 G. 0. SARS. CRUSTACEA. [norw. POL. EXP. 



guments, on viewing the animal from the dorsal side (see fig. 1). The 

 general form of the body is that characteristic of the present genus, being 

 especially distinguished from that in the nearly-allied genus Augaptilus by 

 the unusually small size of the tail, as compared with the anterior division. 

 The latter, seen dorsally, is of a rather regular oblong oval form, with the 

 greatest width occurring somewhat in fi-ont of the middle, and not attaining 

 Vs of the length. It is composed of the same number of segments as in 

 Augaptilus, the 1st, or cephalic segment being well defined, whereas the last 

 2 pedigerous segments are completely coalesced. The cephalic segment 

 occupies rather more than half this division, and is prolonged in front to a 

 very conspicuous, narrow spiniform projection, extending far beyond the 

 insertions of the anterior antennae, and carrying on the tip a very minute 

 hair (see fig. 2). The lateral corners of the last segment are not at all pro- 

 duced, but are evenly rounded off. 



The tail, as stated above, is of very small size, and, including the caudal 

 rami, does not even exceed Ve of the length of the anterior division. It con- 

 sists (see fig. 12) of 4 well-defined segments, the 1st of which, the genital seg- 

 ment, is larger than the other 3 combined, and considerably dilated in the middle. 

 The anal segment is a little larger than the preceding one, and is somewhat 

 obliquely truncated on each side at the junction with the caudal rami. The 

 latter are about twice as long as they are broad, are pronouncedly laminar, and 

 scarcely at all divergent, the broadly truncated ends even being somewhat 

 incurved. The 5 caudal setae belonging to each ramus all seem to be of the 

 same structure, and are clothed with cilia of the usual kind. 4 of them issue 

 close together from the tip, the 5th from a distinct ledge of the outer edge. 

 A small unciliated bristle is also attached to the inner corner of each 

 ramus. 



No trace of any eye could be detected. 



The anterior antennae (see fig. 1) are considerably longer than the whole 

 body, and are rather thick at the base, though gradually attenuated distally. 

 They are composed of the full number of articulations (25), and are clothed 

 anteriorly with slender bristles, some of which are rather elongated. 



The posterior antennae (fig. 3) have the 2nd basal joint more than twice 

 as long as the 1st, both carrying at the end anteriorly a single very small 

 seta. The inner ramus is very long and slender, with the proximal joint 



