_L E. Yen-ill Decapod Crustacea of Bermuda. 4<)! 



From the east coast of Mexico, near Vera Crux, we have a 

 specimen (No. 1810 ? Yale Mus.) which agrees very closely with 

 Edwards' figure of .17". depresses as to the tubercles of the carapace 

 and the marginal spines, and also as to the teeth of the basal 

 antennal joint. But the raerus of the maxillipeds is concave prox- 

 imally, as in our other specimens. In this, the most posterior (4th) 

 marginal tooth is very acute and hooked forward, but the other 

 three are short-tuberculiform or broad obtuse-conical, with coarse 

 granules on their bases ; the more anterior are the larger, as in 



o 



Edwards 1 figure. The tubercles of the carapace are broadly rounded 

 or flattened, which is the case in depress us. 



The merus of the chelipeds has a single obtuse spine on the inner 

 edge ; five on the outer, and two on the upper surface. The carpus 

 is angular and uneven, with a distal transverse fossa and about nine 

 unequal rounded tubercles. 



This approaches the type of M. depress/is more nearly than any 

 other that I have seen. It has the adult form of the female abdomen, 

 while number 4558 ( M. hlspidus), which is considerably larger, has 

 the immature form of the abdomen. It is, however, very unlike the 

 small Bermuda specimen, described above. 



The range of M. depresses is from Florida to the Abrolhos Islands, 

 Brazil (t. M. J. Rathbun). East coast of Mexico (Yale Mus.). 



Mithrax forceps (M.-Eclw.) snb-sp. hirsutipes Kings. Common Spider Crab. 



'. Mithmculus forceps A. M.-Edw., Exp. Sci. Mex. Crust., i, p. 109, pi. xxiii, 



fig. 1, Dec., 1875 (t. Miers). 

 Mithras hirsutipes Kingsley, Proc. Boston Soe. Nat. Hist., xx, p. 147, 1879 



(descr.); Proc. Acad. Nat. Sci., Philad., p. 389, pi. xiv, figs. 1, la, 1879 



(measur.) Eankin, Crust. Berm., p. 532, 1900. 

 Mit h rax forceps Miers. Eep. Voy. Chall., xvii, pp. 87, 88, 1886. Rathbun, 



Bull. Labr. Nat. Hist., Univ. Iowa, 1898, p. 260 (Bahamas and Florida). 

 Mithrax forceps Rathbun, Proc. U. S. Nat. Mus., xv, p. 269, 1892 (descr., 



synon., and distribution) ; Brach. and Macrura Porto Rico, p. 70. 1901. 



FIGURE 42. PLATE XXIII, FIGURES 4, 5, 6. 



This species is easily distinguishable, from the others found at 

 Bermuda, by the three strongly marked oblique ridges and interven- 

 ing wide grooves on the branchial areas of the carapace. The last 

 of these is more or less broken up and nodular; the two anterior arc 

 stronger and smoother, but often bear small tubercles. Two pairs of 

 small tubercles are situated behind the rostral teeth, but there are 

 no tubercles on the median line, and no transverse row on the gastric 



