104 



ambulatory feet are as in M. platysoma. Mr. Lockington 

 was apparently led to separate this from his Pisoides ? cela- 

 tus by working with the synopsis of genera given in Dana's 

 Crustacea of the II. S. Exploring Expedition where the 

 Maiida3 are divided into two groups according as the digits 

 are acuminate or excavate. Mr. Lockington's generic 

 description would totally mislead one in this instance, but 

 his- specific is tolerably good. In the specimen sent (a 

 male), however, the chelipeds are not "enormously long,'' 

 but are fully a short proportionally as in Microphrys 

 bicornuta of Florida. 



Thoe sulcata Stm., Ann. Lye., vii, 177. Platypes edentata Lockington, 

 1. c., March 20, 1876; id., July 17, 1876. 



The specimens sent are plainly Thoe sulcata. Contrary 

 to the generic diagnosis given by Mr. Lockington, the 

 rostrum is bifid and the preorbital is prominent. 



Othonia Picteti de Saussure, Eevue et Magazin de Zoologie, 1853, II, v, 

 357, pi. XIII, f. 2 ; Stimpson, Journal Boston Society Nat. Hist., 

 vi, p. 455. Micippa ovata Lockington, 1. c., July 17, 1876. 



The specimens sent agree exactly with Saussure's de- 

 scription and figure, and certainly do not belong to the 

 genus Micippa. 



Nithraculns areolatus? S. & K. Mithrax areolatus Lockington, 1. c., 

 July 17, 1876. 



This is plainly a Mithraculus, but whether it be new or 

 not we cannot say, as we have not Bell's description of 

 M. denticulatus at hand. It is not M. coronatus Stm. nor 

 Mithrax armatus Saussure. 



Inachodes HempMlli Lockington, 1. c., Feb. 7; id., July 17, 1876. 



The specimens sent are very near /. laevis, but differ 

 from Stimpson's description in having a spiniform tubercle 

 on the gastric region ; the dactyli are flattened and curved 



