448 



A. E. Verrill — Decapod Crustacea of Bermuda. 



are lighter olive with more numerous spots on the palm, becoming 

 paler or yellowish green distally and on the digits, with the granules 

 white. The ambulatory legs are bright blue, with about four orange 

 or bright yellow bands, at the articulations on the proximal end of 

 the segments, each yellow band i^i'^^ceded by a dark blue band; 



Figiire 63. — Clibanarius tricolor, x 2. Phot. A. H. V. 



dactyls bright orange at base, followed by pale orange or whitish, 

 and covered by small bright orange spots ; tips of digits black, 

 excavate within. Several variations were noticed. One differed 

 from all others in having no blue color, except the blue ring that 

 precedes the orange band on the legs, but the legs had the usual 

 round orange spots. The chelae were orange red with white granules 

 and black tips. 



Figure 64. — Siegias clibanarii, female, much enlarged; a, veutral; b, dorsal view. 

 After Richardson. 



It is very abundant at Bermuda, among rocks and in tide pools at 

 low-tide. It occupies many kinds of small gastropod shells, such as 

 Cerithium, Modulus, Littorina, Neritina, Anachis, Columbella, 

 Naticxi. Frequently it takes possession of various land shells, com- 

 monly washed ashore. It is sometimes infested by a parasitic isopod 

 crustacean [Stegias clihanarii Richardson).* 



* Proc. U. S. Nat. Mus., vol. xxvii, p. 59, 1904 ; Monograph of Isopods of N. 

 America, p. 586. figs. 580, «, b, 1905. 



