107 



scription given by Stimpson, but we have not had access 

 to the work of Edwards & Lucas. 



Pilumnns spino-hirsutus Streets & Kiug'sley. Acanthus spino-hirsutus 

 Lockiugton, 1. c, Feb. -7 and Sept. 4, 1876. 



This species is phiinly a Pilumnus and contrary to the 



description given by Mr. Lockingtou of his proposed "new 



genus" the pre-labial ridge is quite pUiin. 



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

 LnjM hellicosa (Sloat MS.) Stm., Ann. Lye, vii, 57; Lockingtou, 

 1. c, Sept. 4, 1876. 



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



descriptions quoted above. \ 



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

 cisjnnis Lockingtou, 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 & Kiugsley. Tubicola longipes Lockingtou, 

 1. c, Apr. 17, 1876. 



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

 faha Stm.) hithertp described from the Pacific coast in the 

 greater breadth of the carapax. Mr. Lockingtou speaks 

 of this as the oulv 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 choetopterana and P. cylindrica. 



