104 



ambulatory feet are as in M.pJatysoma. ISIr. 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 U. S. Exploring Expedition where the 

 Maiidte 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 as short proportionally as in Ilicrqphri/s 

 hicornuta of Florida. 



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

 1. c, JMarch 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 bilid and the preorbital is prominent. 



Othonia Fkteti(\e Saussure, Revue et IMagaziu de Zoologie, 1853, II, v, 

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

 vi, p. 455. Micippa orata 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. 



2Iithracnhis areolatiis? S. & K. Mithrax areolatits Lockington, 1. c, 

 July 17, 1876. 



This is plainly a 31ithraculus, but whether it be new or 

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

 31. (lenficulatus at hand. It is not AT. corouatus Stm. nor 

 3Ii(Iimx annatus Saussure. 



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



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

 from Stimpson's description in having a spiniform tubercle 

 on the gastric region ; the dactyli are flattened and curved 



