PARASITIC CRUSTACEA FROM BIMINI — PEARSE 369 



Measurements : Length 2.5 mm. ; width 0.7 mm. 



Types.— Female, U.S.N.M. No. 88573 ; male, U.S.N.M. No. 88573. 



Host. — Three females and a single male were taken from the 

 branchial chambers of a Pachygy^apsus transversus (Gibbes). 



Remarks. — This species differs from Leidy's (1855) Leidya 

 distorta from Uca pugilator (Bosc), the only one previously de- 

 scribed in this genus. The female is wider, her head is shorter, 

 thoracic legs with better defined terminal claws, and a shorter 

 abdomen. The male differs in the shape of the head and the body 

 segments, the character of the chitonous lateral thickenings on 

 the abdomen, the shape of the anal segment, and the character 

 of the ventral papillae on the thoracic and abdominal segments. 

 Leidy states that his male had 14 body segments. I have examined 

 specimens of males from his host and find only 13 segments pos- 

 terior to the head. 



Family CRYPTONISCIDAE 



Genus CANCRION Giard and Bonnier 



CANCRION CAROLINUS Pearse and Waiker 



Cancrion carolinus Pbarse and Walker, Proc. U. S. Nat. Mus., vol. 87, 

 p. 10, fig. 12, 1939. 



From 489 mud crabs Panopeus herbstii H. Milne-Edwards, 12 

 females of this species were taken from the body cavity. 



Order CIRRIPEDIA 

 Suborder Lepadomorpha 



Genus OCTOLASMIS J. E. Gray 



OCTOLASMIS FORRESTI (Stebbing) 



Octolasmis forresti Stebbing, Ann. Mag. Nat. Hist., ser. 6, vol. 13, p. 444, 

 pi. 15, 1894. 



This barnacle was quite abundant in the gill chambers and to 

 some extent on the mouth parts of spiny lobsters Panulirus argus 

 (Latreille) . Four hosts averaged about 175 each. 



OCTOLASMIS UNCUS, new species 



Figure 77, k 



The capitulum is compressed, triangular with basal angles 

 rounded and the tip slightly bent toward the occludent side ; about 

 three-fourths as wide as long. The occludent margin is curved, 

 but much less than the carinal margin. 



