A. E. Verrill — Decapod Crustacea of Bermuda. 327 



Sesarma Ricordi M.-Edw. 



Sesarma Ricordi H. M.-Edw., Ann. Sci. Nat., ser. 3, vol. xx, p. 183, 1853. 



Kingsley, Proc. Acad. Nat. Sci.. Philad., for 1880. p. 217. M. J. Rathbun, 



Synopsis Sesarmae, Proc. Biolog. Soc. Washington, xi, p. 91, 1897 (descr. 



and synon.). 

 Brachy. and Macr. Porto Rico, p. 18, 1901 (descr.). Verrill, these Trans., 



X, p. 574, 1899. 

 Seaavma anr/xistijjes Stimpson (jjars) Smith, these Trans., ii, p, 159, 1869 



{non Dana, t. M. J. Rathbnn). 

 Sesarma cinerea Stone, in Heilprin, op. cit., 1898. Rankin, op. cit. , p. 526, 



1900 {non Say, sp.). 

 Sesarma Sfimpsonii Miers, 1881, not of 1886 (t. Rath bun). 



Plate X, Figure 2. Plate XI, Figure 3, var. 



This common species is very variable in colors in life. The cara- 

 pace is usually irregularly and variously mottled with olive-brown, 

 olive-green, or reddish brown on a yellowish green or light olive 

 ground color, in most cases pretty closely imitating the varied colors 

 of the dead algae and stained stones among which it most commonly 

 lives. 



Miss Rathbun, who has examined many of the original types, 

 unites several nominal species with this. It seems to be distinct 

 from the true cinerea and angnstlpes, with both of which it has 

 often been confused. Probably the real cinerea does not occur at 

 Bermuda.* 



The carapace of the typical variety appears neai'ly smooth to the 

 eve over most of the surface, but under a lens shows minute 

 sparse granules and hairs, which become more evident anteriorly and 

 on the front, while on the sides, posteriorly, there are faint oblique 

 plicae. The lateral margins ai"e nearly straight or only slightly 

 sinuous ; the front is a little sinuous on the edge with a slight 

 median notch. The carapace is only slightly broader than long. 



Measurements of Bermuda specimens. 



* Dr. Rankin has kindly sent me for examination the specimens that he 

 recorded (1900) as S. cinerea. They prove to be S. Ricordi. 



