734 I'ROCEEDINGS OF TIIIC NATIONAL MUSEUM. vol.xxi. 



spaces between the minute stria* at the base of the supplementary mar- 

 gin are i)ro(luced into small, broad, regular teeth. 



Penultimate segment sliort, the carinii- narrow and spiniform, not 

 exceeding those of segment 18. 



Last segment with projecting portion rather narrow, triangular, 

 truncate; the seliferous tubercles are distinct, though small. 



Anal valves with distinct, compressed, moderately i)rominent mar- 

 gins; surface of anal valves and preanal scale slightly rugulose. 



Sterna rather sparsely hirsute; the ridges, which are i)romincnt and 

 distinct elsewliere in A-strodefimufi, are here almost rudimentary, but 

 the sterna are prominent between the bases of tlie legs, these broad 

 ridges being separated by a transverse depression. 



Sternum of segment more hirsute than the others with long hairs, 

 the process also hirsute, subtriangular in form, not so strongly apiculate 

 and shouldered as in other species, and with a very broad sloping base 

 which extends nearly to the sockets of the legs. 



Sternum of segment 7 with rim of copulatory legs not produced at 

 the base of the normal legs as in A. stellifer. 



Sternum of segment 15 with process shaped mucli as in A. Htellifer, 

 but smaller. 



Legs of male long and slender, the anterior slightly stronger than 

 the i)osterior and more densely hirsute, the last two joints tuberculate 

 on the ventral face. 



Copulatory legs (Plate LXI, figs. Gb-Qd). 



Color of alcoholic specimen pale bone yellow with traces of a darker 

 color dorsally. 



Length, 33 mm.; width, 6.5 mm.; without carinte, 4.5 mm.; length 

 of antenna, f>.;"> mm.; of leg from sixth segment, 7 mm.; of leg from 

 tenth segment, 6.5 mm. 



Locality. — A single male specimen, collected by Fischer at Zanzibar, 

 is in the Berlin Museum. 



This similarity of the copulatory legs seems to indicate a close relation- 

 ship with stellifer, from which there is, however, great distinctness in 

 size, habit, and proportionally much longer and more slender legs. 



Tlie ridges or secondary carinjc above the bases of the legs are very 

 prominent in this species and are beset with papiJliform tubercles much 

 as in some Oxydesmidte. It seems ijrobable that these prominences 

 are of use in supporting the creature when it rests, and they are prob- 

 ably correlated with the dorsal prominence of the second joint of the 

 legs, which i>robably lies against them. 



ASTRODESMUS LURIDUS rKarsch). 



(Plate LXI, figg. ia, il.) 



Eurydesmits luridus Karsch, Troschel's Archiv f. Naturw., 1881, p. 43. 

 Aslrodesmm luridua Cook, Proc. U. S. Nat. Mns., 1895, XVIII, p. 88. 



Segments somewhat more convex than in A. stellifer, especially the 

 anterior; their surface smooth, somewhat uneven and rugulose laterad. 



