414 



A. E. Verrill — Decapod Crustacea of Bermuda. 



It is everywhere common on the rocky shores at low tide and on 

 the reefs, living in crevices and under stones, or often more or less 

 exposed. It is contained in nearly every Bermuda collection, includ- 

 ing those of Jones, Goode, and others of early date. 



Its range extends from Florida to Bahia, Brazil. Common on 

 coral reefs throughout the West Indies. Abrolhos Reefs, Brazil, 

 Colon, Florida, and Bermuda (Smith); Peinambuco (Rathbun). 



Macrocoeloiua trispinosum (Latr. ) Miers. Spider Crab. 



Pisa tris2}inosa Latr., Eucy. Meth., Nat. Hist., x, p. 142, 1835. 



Pericera trispinosa H. Milue-Edw., Hist. nat. Crust., i, p. 336, 1834. A. 



M.-Edw., Miss. Sci. Mex., v, p. 52, pi. xv, fig. 2, 1873. 

 Macrocoeloma trispinosa Miers, Journ. Linn. Soc. London, xiv, p. 665, 1879 ; 



Voy. Chall., Zool., xvii, p. 80, 1886. M. J. Eathbnn, Proc. U. S. Nat. Mus., 



XV, p, 249, 1892 (syn. and distribution) ; Brach}'. and Macr. Porto Rico, p. 



74, 1901. 



Figure 44, 



This is one of the more common crabs at the Bermudas. It occurs 

 from low water to 10 fathoms and more. It is very slow in its 



Figure 44. —Macrocoeloma trispinosum, with the hairs, etc., removed from the 

 left side of the carapace; about nat. size. Phot. A. H. V. 



motions and for its protection depends largely on the growth of 

 sponges, algffi, etc. which usuall}'^ entirely covers the nodulose cara- 

 pace, causing it to resemble a stone or a mass of sponges. When 



