A. E. V err ill Decapod Crustacea of Bermuda. 411 



inner one by the notch for the base of the flagellum ; the inner one 

 is inconspicuous and often abortive. The notch between the two 

 larger teeth is broadly concave. The outer tooth is just about the 

 same length and si/.e as the preocular tooth, but is more obtuse. The 

 rostral teeth are short and obtuse, with thickened and slightly 

 upturned edges in the adults. The subrostral process is large, con- 

 cave, and obtuse. 



Young specimens differ much from the adults in appearance. The 

 oblique ridges of the carapace are all more broken up into nodules 

 and tubercles, and the whole surface of the carapace is more nodose, 

 so that it resembles that of M. sculpt us in this respect, but the 

 latter can easily be distinguished by the tuberculiform lateral teeth, 

 roughened carpus, and other characters. The carapace of the young 

 is also longer in proportion to the breadth (1: 1.12 to 1: 1.15). 



Specimens recently preserved in alcohol and not much altered are 

 mostly light yellowish brown or chestnut-color, varying in the same 

 lot to orange and to purplish brown. 



In life the carapace is usually uniform yellowish brown, varying 

 to dull yellow and to greenish brown, without mo tt lings. Often 

 there is a wide, pale yellow, medial dorsal stripe, especially in the 

 young. Large males are sometimes plain chestnut or terra- cotta 

 color. In the young the legs are often banded with lighter colors. 



Females carrying abundant eggs were often taken in April and 

 May, 1898 and 1901. A large female, taken in midsummer by Prof. 

 Kincaid, also carried eggs. This crab is often captured by the large 



Octopus. 



Measurements of Bermuda specimens. 



The ratios of length to total breadth in the above are 1:1.18, 



^3 



1 : 1 .24, 1:1.13, 1 : 1.22 respectively. 



The egg-bearing females, taken in April and May, can be grouped 

 in three pretty distinct sizes, though some intermediate ones occurred. 

 The larger ones averaged in length of carapace, about 16 mm ; breadth, 

 18"""; those in the next smaller series average about 1 3"' m long; 

 15 mm wide; the smallest group, about 1 I" 1 " 1 long; 12.5 mm wide. The 



TRANS. CONN. ACAD., VOL. XIII. 29 MARCH, 1908. 



