324 DR. H. J. HANSEN ON THE [JSTOV. 29, 



from the basal joint of antennse. The processes from the front 

 mai-gin of the head are more produced and much more curved, 

 the processes or teeth on the lateral margms of abdomen con- 

 spicuously longer than in any other species hitherto discovered. ■• 



6. Stenetrium occidentale, sp. n. Adult male and ovigerous 

 female. (Plate XX. figs. 2 a-2 ?i.) 



Head shaped as in S. antillense (PI. XXI. fig. 1 h) ; its upper 

 surface (the frontal plate excluded) is considerably less than 

 twice as broad as long ; the lateral part, seen from above, is 

 feebly expanded and produced into a small acute process ; the 

 fi'ont margin outside the base of each antennula produced into a 

 broad but rather low process, with the end obtuse. Eyes of 

 moderate length, oblong, somewhat curved, very oblique and con- 

 siderably removed from the lateral margin of the head. 



Antennulse Avith the second joint slightly longer than the third, 

 moderately robust ; flagellum in the male 9-jointed and as long 

 as the svim of the two distal joints of peduncle, in the female still 

 shorter, with four or five joints. 



Antennae have the basal joint distally cut off transversely, its 

 outer angle without process and measming about 90°. 



First thoracic legs very different in adult specimens of the two 

 sexes, but in immature males nearly as in adult females. — In the 

 male they are rather long, robust ; third joint is distally much 

 expanded above and produced into a triangular process directed 

 upwards ; fourth joint expands above gradually from the base,, 

 forming a broad but rather low process, a portion of the inner 

 surface of which is furnished with numerous exceedingly long 

 hairs. Fifth joint has the upper margin very short, without any 

 piocess, but it expands below, its lower margin is several times 

 longer than the upper, and besides it is produced into a very long 

 oblong-triangular process, the inner side and both margins of 

 which are closely set with long or very long hairs ; the upper 

 margin of the process is straight nearly to the insertion of the 

 hand, and the distance from this insertion to the end of the pro- 

 cess is longer than the distance from the insertion to the base of 

 the joint. The hand is very large, a little broader near the eiid 

 than at the base, two and a half times longer than deep ; upper 

 margin strongly convex, lower margin rather concave from the 

 base to the distal process, which occupies the major portion of 

 the short palmar edge ; this process is low, broad, its margin more 

 or less convex and divided into three or four teeth; the lower 

 major portion of the inner surface of the hand is closely set with 

 very long hairs. Seventh joint very long, much curved, especiall}' 

 at some distance from the base, claw-shaped, with fine simple 

 hairs spread along both margins and on the inner side, but with- 

 out spines ; the claw itself is very short. — In the female the legs 

 are much shorter than in the male, robust ; process on third joint 

 proportionately a little longer and broader, that on fourth joint a 

 little longer than in the male ; fifth joint much smaller than in 



