42 



U.S. NATIONAL MUSEUM BULLETIN 29 5 



Figure 17. — Paranesidea fracticorallicola, n. sp.:A,B. Male USNM 121287; C,D, male 

 USNM 121290., 



A, Mandible, X 301; B, copulatory organ and furca, X 201; C,D, carapace interiors, 

 X 75. 



Two species from the abyssal fauna, P. albatrossa, new species, and 

 P. species 1, assigned below to Paranesidea, conform superficially to 

 the diagnosis of this genus in carapace shape, muscle-scar pattern, 

 and what is known of their appendage anatomy. However, their very 

 large and robust carapaces, entirely without any patterned differenti- 



