82 IOWA STUDIES IN NATURAL HISTORY 



Barbados ; May 15 ; 1 9 ovig. ; median length of carapace 14, 

 width 12, length to tip of rostral horns 14.8 mm. 



Besides the tubercles on the carapace mentioned by Stimpson 

 there are 4 tubercles or granules forming a transverse oblong on 

 the branchial region, 2 of the granules near the inner angle of this 

 region and the other 2 granules in a line posterior to the middle 

 of the cardiac region. There is also a granule on the dorsal sur- 

 face which forms a triangle with the 2 marginal spines at the 

 widest part of the carapace. The row of spines on the merus of 

 the cheliped is on its upper margin. 



Not before found south of St. Thomas. 



LissA BiCARiNATA AurivilHus 

 Plate II, fig. 1. 

 Rathbun, Bull. U. S. F. C, vol. XX for 1900, part 2, 1901, 

 p. 64. 



S. W. of Pelican Island, Barbados, 1 mile ; 38 fathoms ; bottom 

 of fine coral fragments ; May 13 ; sta. 1 ; 1 5 ovig. ; carapace con- 

 cealed dorsally by a calcareous coating which does not disguise 

 the characteristic elevations. 



Subfamily Schizophrysinae 



Thoe puella Stimpson 

 Rathbun, Bull. U. S. F. C, vol. XX for 1900, part 2, 1901, 

 p. 63. 



Pillars of Hercules, Antigua; 2 5 3 $ (1 ovig.). 



MiTHRAx SPiNOSissiMus (Lamarck) 

 The Lazy Crab Hughes, Nat. Hist. Barbados, 1750, p. 262, pi. 



XXV, fig. 1 (part: chelipeds and legs only). 

 Mithrax spinosissimiis Rathbun, Bull. U. S. F. C, vol. XX for 



1900, part 2, 1901, p. 66. 



Barbados : W. N. W. of Lazaretto ; N. N. W. of Pelican Island ; 

 33 fathoms; bottom rocky; dredge; May 27; sta. 51; 3 young. 



The largest of these, about 9 mm. long in the median line, 

 shows a small spine on the basal antennal segment at the base of 

 the next segment. 



Mithrax acuticornis Stimpson ? 



Rathbun, Bull. U. S. F. C, vol. XX for 1900, part 2, 1901, 



p. e6. 



