2( 5o NATURAL HISTORY BULLETIN. 



lateral margin with two prominent spines, one hepatic, and 

 the other at the branchial angle; between them are two clus- 

 ters of tubercles; in front of and behind the branchial spine 

 there is a small spine or spinule. Inferior regions of the cara- 

 pace covered with tubercles which become spinulous on the 

 sub-hepatic region. Chelipeds with meri armed with stout 

 blunt spines above; hands unarmed. Ambulatory legs flat- 

 tened above and hairy; meral and carpal joints armed with 

 two rows of spines. 



Dimensions. — Entire length of carapace, 21.5; length to 

 base of rostral horns, 20; entire width, 21.2; width without 

 spines, 18.4; exorbital width, 12.3 mm. 



Specimens agreeing with the above and taken at St. Croix 

 and St. John, West Indies, are in the Museum at Copenhagen. 

 One immature female has been presented to the United States 

 National Museum. 



45. Mithrax forceps [A. Milne Edwards). 



Stations 45 and 46, off Key West, shallow water; Tortugas; 

 Spanish Wells; Bahama Banks. 



46. Mithrax sculptus [Lamarck). 



Tortugas, shallow water; Harbor Island and Spanish Wells, 

 Bahamas. 



47. Mithrax coronatus [Herbst). 



Sand Key Light, in rocks, sponges, etc.; Tortugas; Egg 

 Island and Harbor Island, Bahamas. 



One male from the Tortugas is of unusual size, measuring 

 in length 21.3 mm.; width, 27.7; length of propodus of che- 

 liped, 22.8; depth of same, 11; thickness, 6.7 mm. 



48. Thoe puella Stimfson. 

 Tortugas. 



PARTHENOPID^E. 



49. Lambrus pourtalesii Stimpson. 



Stations 24 and 47, off Key West, 60 to 80 fathoms; stations 



