183 



in size; inner ramus of 4th pair resembling that in the preceding pairs. Last 

 pair of legs more fully developed than in the preceding genera, the free joint 

 being rather produced, and armed with one lateral and 2 apical spines having 

 between them a slender bristle. 



Remarks. The type of this genus, recently established by the present 

 author, is Lichomolgus arenicola Brady, which, as shown by T. Scott, differs 

 in several points very conspicuously from Thorell's genus. Scott referred this 

 form provisionally to the genus Hermannella of Canu, apparently owing to 

 the distinctly 3-articulate inner ramus of the 4th pair of legs. It cannot how- 

 ever in my opinion be referred to that genus, as it differs in some very im- 

 portant points, thus in the structure of the posterior antennae, the maxillae, the 

 posterior maxillipeds in the female, and finally in the form and armature of 

 the last pair of legs. The typical species has not yet been observed by me; 

 but 2 nearly allied species will be described below. 



99. Pseudomolgus leptostylis, G. O. Sars. 



(PI. GUI). 



Pseudomolgus leptostylis, G. O. Sars, Bulletin de 1'Institut oceanographique de Monaco 



No. 323, 1916, p. 51, Pi. III. 



Specific Characters. Female. Body rather slender, but with the 

 anterior division conspicuously more expanded than in the type species and 

 broadly oval in outline, greatest width exceeding half the length and occur- 

 ring in front of the middle. Last truncal segment rather narrow and without 

 any lateral projections. Tail very slender and narrow, considerably exceeding 

 half the length of the anterior division; genital segment not very large and 

 only slightly dilated in the middle; anal segment nearly as long as the 2 

 preceding segments combined. Caudal rami much more produced than in the 

 type species and very narrow, attaining almost half the length of the remaining 

 part of the tail; seta of outer edge attached about in the middle; apical setae 

 not much elongated. Anterior antennae moderately slender, not fully attaining 

 the length of the cephalon, and composed of 7 well defined joints, the 2nd 

 of which is the longest. Posterior antennae much shorter than the anterior, 

 but very strongly built and of nearly equal width throughout, last 2 joints 

 completely fused together, apical claws 4 in number of about equal length, 

 the hindmost one, however, conspicuously narrower than the others. Maxillae 

 with the principal masticatory lappet coarsely denticulated along the outer 

 edge, the 2 proximal denticles being much stronger than the others; palp 



