PARASITIC CRUSTACEA FROM BIMINI— PEARSE 365 



Genus CYBICOLA Bassett-Smith 



CYBICOLA ELONGATA, new species 



Figure 76 



Female. — Body more than nine times as long as wide, without 

 segmentation. Head a little wider than remainder of body, with 

 a shallow median sinus in front, rounded behind; length a little 

 more then one-seventh of total length of body ; narrower in front 

 fourth. Thorax with lateral constrictions that separate the first 

 two segments and swellings that indicate the third. Genital seg- 

 ment not distinct. Abdomen behind it not distinct, a little longer 

 than wide. Caudal rami not so long as abdomen ; tips rounded and 

 bearing one long and two short setae. 



First antenna 7-segmented ; a seta on the basal segment and at 

 least three at tip. Second antenna small, 3-segmented; terminal 

 hook with a spine on inner margin. Mouth tube slender and coni- 

 cal. First maxilla with a small terminal hook and two strong setae. 

 Second maxilla anterior to first, near base of mouth tube ; small, 

 slender, with curved terminal hook. Maxilliped enormous, covering 

 most of ventral side of head, with lamellate outer margin on pen- 

 ultimate segment except where the terminal hook meets it; there 

 it is smooth near the hook and farther proximal it is setose; a 

 stout, short, spine at the medial base of the terminal hook, which 

 is sharply curved. 



First leg surrounded by, and first three legs associated with, 

 lateral, finely papillose areas. First leg biramous, with a spine at 

 the base and a spine on either side of the distal margin of the 

 basal segment; exopod 1-segmented with four minute spines at 

 tip ; endopod uniramous, with a seta at tip ; papillose area with a 

 seta at posterior margin of disc that surrounds the appendage; 

 another elliptical papillose area on the lateral margin of the body 

 near the first leg. Second leg uniramous, flat, rounded at tip, with 

 a row of striations on the lateral surface; papillose area lateral 

 to it, oval, and larger than that with first leg. Third leg very 

 small; the single segment with a small curved terminal hook. 

 Fourth leg a seta that arises from a papilla. 



Measurements : Length 5.3 mm. ; length of head 0.7 mm. 



Male. — Unknown. 



Type.— V.S.N. M. No. 88538. 



Host. — Three females were taken from the gills of a Spanish 

 mackerel, Scomber omorus maculatus (Mitchill) . 



Remarks. — In his description of the genus (Helleria) Cyhicola 

 (1898a, p. 11; 1898b, p. 371) Bassett-Smith states that there are 

 no fourth legs. From his figures and a comparison with my speci- 

 mens my feeling is that he either overlooked the third legs or that 



