PUERTO RICAN COPEPODS — GONZALEZ AND BOWMAN 267 



Female. — Length 1.1-1.2 mm. Genital segment inflated dorsally, 

 about twice as long as anal segment. Caudal rami divergent, longer 

 than urosome. Re3 of Pi as in G. amazonicus. Proportional lengths 

 of Rel-Re3 of P4 approximately 27:15:20; outer seta of Rel long as 

 in C. amazonicus. 



Male. — Length 0.85-1.0 mm. Genital segment about twice as 

 long as anal segment. Caudal rami about % as long as m-osome. 



Distribution. — Atlantic coast of the United States, from Block 

 Island Sound, R. I. (Deevey), to Port Aransas, Tex. (M. S. Wilson). 

 In the Puerto Rican collections it occurred in small numbers in the 

 bays and on the shelf. 



Remarks. — Although Herrick's description and illustrations differ 

 in some respects from those of M. S. Wilson, we believe the discrep- 

 ancies can be attributed to Herrick's inaccuracies. We place (7. 

 americanus in synonomy with C. subulatus for the following reasons: 



1. Herrick's statement "The inner ramus of the fourth feet is 

 reduced to a process bearing two long setae" places his species in the 

 subgenus Ditrichocorycaeus. 



2. The length of the caudal rami shown in Herrick's figure 7 

 eliminates all known species of Ditrichocorycaeus except americanus. 



3. Other species of Corycaeus with long caudal rami (e.g., Urocory- 

 caeus spp.) are not inhabitants of coastal water. 



4. Mobile Bay, Ala., the type locality for C. subulatus, is within 

 the range of C. americanus. 



Genus Farranula C. B. Wilson 



Prosome 2-segmented. PedSeg 4 fused with PedSeg 3; posterior 

 corners not produced into points. Ventral process beak shaped in 

 female, rounded in male. Urosome 2-segmented. Setae of Bl and 

 B2 of A2 plumose in both sexes. Re of P1-P4 with 0-0-1 outer 

 spines. Ri of P4 absent. 



Farranula gracilis (Dana) 



Figures 18d-g 



Corycaeus gracilis Dana, 1849, p. 35. — F. Dahl, 1894, p. 69. — L6gar6, 1961, 



table 5. — Zoppi, 1961, table 4. 

 Corycaeus (Corycella) gracilis Dana. — M. Dahl, 1912, pp. 108-111, pi. 14, figs. 



11-21; pi. 15, figs. 15, 16, 29, 30. 

 Corycella gracilis (Dana). — Bjornberg, 1963, pp. 85-86, fig. 47. 

 Corycaeus carinatus Giesbrecht. — Wheeler, 1901, p. 192, fig. 30. 

 Corycella carinata (Giesbrecht).— Wilson, 1932a, p. 41; 1932b, p. 362, fig. 220. 



Female. — Length 0.94 mm. Urosome in lateral view as in figure 

 IS^r with part of dorsal margin subparallel to ventral margin. 

 Male. — Smaller than female, and with longer caudal rami. 



