Decapod Crustacea of Bermuda, Part II. 69 



a broad band of whitish, which is covered with small dark green 

 spots. On the outer side the color is often pale or nearly white ; 

 the dorsal edge and the spines at base of dactyl orange; thumb 

 dark green or brown ; dactyl orange-brown, with a white tip. 

 Smaller chela similar in color, but the middle orange band is wider 

 and the white bands narrower and often more or less interrupted ; 

 sometimes lacking. 



Legs pale, translucent, specked with orange; the fourth pair 

 more orange. Antennae pale yellowish green. Eyes brown. 

 Sometimes the chelae are greenish with orange spots ; sometimes 

 they are reddish brown, with dark red specks and a narrow white 

 middle band. The edges of the carapace are sometimes orange. 



Specimens preserved for a short time in formol are rather bright 

 orange ; large chela is crossed, on the outer side, by three trans- 

 verse patches of whitish and is specked and spotted with white. 



Found by us not uncommon at Bermuda (1898, 1901 ) in cavities 

 of dead corals and reef rocks, etc. Cuba (Guerin) ; Key West 

 (Kingsley). Porto Rico (Rathbun). Tortugas (Coutiere). 



This species is very closely allied to A. clamator Lock.r= 

 A. transverso-dactylus (Kings.) of California,* with which indeed 

 Prof. Kingsley and others have considered it identical. In the 

 Yale Museum are two lots of specimens from California, which 

 are the types or cotypes of Kingsley (see our pi. 24, figs. 4, 5, 6 

 and pi. 29, figs. 20, 2&, /"). Specimens from Bermuda, labelled 

 as the same, by him are also before me. 



A careful comparison of these and numerous other specimens, 

 received later, shows some differences that seem to be constant 

 and indicate that the two forms are distinguishable. 



The larger chela of the California species is longer and relatively 

 thicker distally; the notches and grooves of the palm are deeper 

 and more complicated, though mostly of the same pattern, but it 

 has a deep longitudinal subdorsal groove running back from the 

 distal transverse furrow to about the middle of the palm. This is 

 entirely lacking in all the numerous Bermuda specimens examined 

 or else only faintly indicated by a slight wave-like depression. 

 The dactyl of the California form is more obliquely articulated and 



* According to S. J. Holmes (op. cit, p. 182) this species, described by 

 Lockington, in 1877, as A. clamator, is identical with A. transverso-dactylus 

 Kingsley, 1878. Schmitt, op. cit., 1921, p. 74, fig- 5<>, does not separate it 

 from A. dentipes. 



