REVISION OF RECENT BAIRDIIDAE 



103 



Figure 54. — Zabythocypris helicina, n. sp.: A-F,H, Female USNM 121625; G, male (?) 

 specimen USNM 121626. 



A, Genital lobe and furca; B, egg; C, maxilla; D,H, carapace interiors; E, left interior 

 muscle-scar pattern; F, right valve anterior margin, exterior view; G, left exterior. A,C, 

 X 152; B, X 127; D, X29; E, X 75; F-H, X 43. 



