408 



-I. E. 



Decapod Crustacea of Bermuda. 



ever, specimens of intermediate sixes. that scorn to unite tin- t\vu 

 supposed species together in one series. 



Although tliis specimen appears to me to be the young of .)/. ///*- 

 pidus, I have kept it under M. d<'i->x*'n< out of deference to the 

 opinion of Miss Rathbun, wlio 1ms examined it. for slie lias had 

 opportunities to study a far larger series of Loth forms than I have 

 had. 



It differs from the original figure of M. <l, />, *n* (see our fig. 8 1), 

 not only in its proportions, but especially in ha\ing all the four 

 antero-lateral marginal teeth acute and curved forward, while in the 

 latter the anterior three are tuberculiform and obtuse. Its front is 

 narrower between the orbits. The. basal antennal joint has the 



Figure 41. Mitln-n.'- il>jn v.ssn.x-; u. dm-sal view, x 2 1 ., times; b, under side of 

 front, more enlarged. After A. M. Kdwards' original figures. According 

 to the natural size diagram of Edwards, his specimen was l:!" 1 " 1 long and 



JOmm 



inner tooth narrower and sharper, and the outer one more prom- 

 inent and acute. The merus of the chelipeds lias a different form, 

 the proximal end being concave instead of convex, etc. It is rather 

 smaller than Edwards' type, which was also young, but longer than 

 wide, while ours is wider than long. 



On plate xxiii, tig. 2, I have figured a St. Thomas specimen of 

 larger size, also labelled as M. depressus by Miss Rathbun, for com- 

 parison. This is rather larger than Edwards 1 type and agrees more 

 nearly with his figure in respect to the form of the marginal teeth. 

 but is otherwise very similar to the undoubted young of J7". hi#]>idns. 

 The carpus of the young of the latter is also spinulous. 



The larger antennal tooth is shorter and more obtuse than in any 

 of the others figured. 



