107 



scription given by Stimpson, but we have not had access 

 to the work of Edwards & Lucas. 



Pilumnus spino-hirsutus Streets & Kingsley. Acanthus spino-hirsutus 

 Lockington, 1. c., Feb. 7 and Sept. 4, 1876. 



This species is plainly a Pilumnus and contrary to the 

 description given by Mr. Lockington of his proposed " new 

 genus" the pre-labial ridge is quite plain. 



Callinectes bellicosus Ordway, Jour. Boston Soc'yNat. Hist., vii, p. 577. 

 Litpa bellicosa (Sloat MS.) Stm., Ann. Lye., vii, 57; Lockington, 

 1. c., Sept. 4, 1876. 



The specimen sent, a male, agrees well with the various 

 descriptions quoted above. 



Achelous panamensis? Stimpson, Annals Lye., x, 112. Amphitrite pan- 

 cispinis Lockington, 1. c., Sept. 4, 1876. 



The specimen sent agrees well with Stimpson's descrip- 

 tion, except in having no spine on the meros joint of pos- 

 terior feet. There is in this form a spine on the upper 

 margin of the propodus of the first pair, as in Achelous 

 Gibbesii, two-thirds the distance from the base to the 

 articulation of the dactylus. Stimpson makes no men- 

 tion of such spine. The proportions of length to breadth 

 are closely similar. Stimpson gives it as 1 : 1-87. In 

 this case it is 1 : 1-82. 



Pinnixa longipes Streets & Kingsley. Tubicola longipes Lockington, 

 1. c., Apr. 17, 1876. 



This is a Pinnixa, but differs from the only species (P. 

 faba Stm.) hitherto described from the Pacific coast in the 

 greater breadth of the carapax. Mr. Lockington speaks 

 of this as the onh r case known of a crustacean being com- 

 mensal with an annelid, but Stimpson (Annals N. Y. 

 Lyceum, vii, 68 and 236) reports similar habits of Pin- 

 nixa chcetopterana and P. cylindrica. 



