46 



U.S. NATIONAL MUSEUM BULLETIN 2 95 



Figure 20. — Paranesidea gigacantha (Kornicker), male USNM 121296. 



A, Antenna; B,C, carapace exteriors; D, furca; E, copulatory organ. A,D, X 152; 

 B,C, X 37; E, X 301. 



Affinities. — The females of the Florida Bay assemblage are con- 

 siderably larger than those from the Bahamas but have very similar 

 shape, marginal denticulation, and opaque pattern. "Bairdia" vidrix 

 Brady, 1869, is more produced at anterior and posterior ends. 



Paranesidea arostrata (Kornicker) 



Figure 21 

 Bairdia arostrata Kornicker, 1961, p. 65, pi. 1: fig. 8a-b; 8a-h. 



Material. — Paratype male specimen 122C-1 from Bahamas. 



Distribution. — Bahamas. 



Affinities. — No other species has been described with a copula- 

 tory organ having a bifurcate and otherwise structureless terminal 

 lobe. However, its median lobe and sigmoid copulatory tube are 

 typical of Paranesidea, as are the other appendage characters and the 

 carapace. 



Paranesidea algicola, new species 



Figures 22-24; Plate 1: figures 7, 8 



Etymology. — Latin alga, seaweed + cola, dweller. 

 Type specimens. — Holotype male USNM 121299; allotype female 

 USNM 121300; paratypes USNM 121301. 



