A. E. Verrill — Decapod Crustacea of Bermuda. 369' 



marginal teeth and frontal lobes are very similar to those of C. 

 ornatns, but in this the two middle frontal lobes are a little more 

 prominent. The basal appendages of the male abdomen are 

 unusually short and small, and quite unlike those of the other spe- 

 cies. (See fig. 22, b.) Its colors in life were not noted. 



Measurements. 



, Carapace > Front 



breadth bet. Chelae 



No, Sex I'gth total —spines orbits length height Locality 



r. 58 r. 20 Key West, 



1. 55 1. 16 Fla. 



1735 ^ 42 90 77 16 



19036 fig. i 20 41 34 7 r. 21 6.5 Bermuda 



( r. 66 23 



"( 1. 64 18 



1427 5 47 99 84 28 * \- «? ?? Florida 



On No. 1735, the intramedial gastric area is 7.5™™ long in 

 middle ; 16™"' broad anteriorly, In 1903^, it is 3.75'"™ by 8™™ ; in 

 1427, it is 8"'™ long, by 20 broad at widest pai't anteriorly. 



A rather large specimen was in the collection of Mr. Goode (1876). 

 Several young were obtained in the summer of 1903 by the Bermuda 

 Biological Station. It ranges from Florida to Bahia, Brazil (Smith). 

 It is common and used as food in some of the West Indies. Dominica 

 I., common (A. H. Verrill, 1906). On the west coast of Africa, 

 from Cape Verde Islands to St. Paul de Loanda (Rathbun). Per- 

 nambuco, Maceio, etc., Brazil (Rathbun). Ord way's types of G. 

 larvatus were from Florida, Bahamas, and Hayti. 



The type of N'. marc/iuatiis (Edw.) was from West Africa. 

 It was a barren or immature female with no very evident charac- 

 ters, as figured, to identify it with this species. This determination 

 was made by Miss Rathbun.* 



* I am not convinced of the correctness of this determination. The latter, 

 as described and figured, has a broader carapace ; ratio, as described, 1: 2.17, as 

 figured, 1:2.33, while in our C. larvatus, of similar size, it is 1:2.05; the merus 

 of the maxillipeds has a decided notch at the insertion of the palpus, to which 

 Edwards particularly refers ; in larvatus the notch is not evident. The trans- 

 verse granulated ridge of the carapace, from the anterior base of the lateral 

 spines, curves much farther forward than in C. larvatus. It seems to me more 

 probable that marginatus is a distinct but closely allied African species. 



However Miss Rathbun has recorded additional specimens of C. marginatus 

 from several localities on the W. African coast and Cape Verde Islands (op. 

 cit., p. 291, 1900), but she has neither figured nor described the African speci- 

 mens. Meantime, I prefer to retain larvatus as a name for the American form. 



