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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 101 



The scutum is calcified in two segments; occludent segment 

 curved and pointed at both ends and gradually tapered; carinal 

 segment bifid at the distal end but otherwise much like the occlu- 

 dent segment. Tergum large, stout and bent to form strong sharp 

 hook on the carinal side, therefore the specific name uncus. 



The carina is moderately curved above, strongly so near the base. 



The peduncle is a little longer than the capitulum, cylindric, and 

 wrinkled transversely. 



Type.—V.S.^M. No. 88582. 



Host. — Six specimens were collected from the gill chambers of 

 two stone crabs, Menippe mercenaria (Say). 



Remarks. — This species differs from Octolasmis geryonophila 

 Pilsbry (1907). Pilsbry's specimens in the National Museum show 

 some variation in the hook on the tergum but in no case is it as 

 long, as sharp, or as sharply bent as in the present species. Also 

 the two segments of the scutum are narrower, closer together 

 proximally, and the carinal segment is bifid distally in the present 

 species. 



OCTOLASMIS BREVIS, new species 



Figure 77, j 

 The capitulum is compressed, more than three-fourths as wide 



Figure 77. — a-i, Leidya bimini, new species: Male: a, Seventh leg; b, ventral view 

 of head and left first leg; c, right lateral portion of first abdominal segment; d, 

 left lateral portion of fifth abdominal segment; e, entire body of male. Female: 

 /, Third leg; g, dorsal view of head and first two thoracic segments; h, first an- 

 tenna; I, second antenna; ;*, Octolasmis brevis; k, Octolasmis uncus. 



