REVISION OF RECENT BAIRDIIDAE 



29 



Figure 9.—Neonesidea arenigena, n. sp. A-C,F,G,IJ, female USNM 121268; D,E,H 

 holotype male USNM 121267; K, male USNM 121269. 



A, B, D, E, Carapace exteriors; C, muscle-scar pattern; F, third thoracic leg; G, second, 

 thoracic leg; H, copulatory organ and furca; I, first thoracic leg; J, K, antennae. A,B,D, 

 E, X 37; F, G, I, X 152; H, J, K, X 301. 



SuBFOssiL DISTRIBUTION. — Nosj Be, present in shallow-water car- 

 bonate sands near reefs, but reaching greatest abundance in quartz- 

 carbonate sandy muds offshore and away from reefs at depths of 

 10-30 m. 



Affinities. — The left valve lateral outline and copulatory organ 

 are very similar to those illustrated for N. incognita (Lerner-Seggev) : 

 distally pointed antennal claw, a striate posteromarginal fringe on the 

 right valve, and two very tiny proximal setae forming a total of 6 

 furcal setae. 



327-237 O— ■6(9 3 



