A. E. Verrill — Decapod Crustacea of Bermuda. 



391 



Beaufort, N. C, and West Florida (Kingsley). Egmont Key, 

 Fla., No. 981, and Fort Macon (Yale Mus.). 



Achelous depressifrons Stiinp. 



Amphitrite depressifrons Stimpson, Notes, No. I, Annals Lye. Nat. Hist. N 



York, vii, p. 58 [12], 1859. 

 ■ Achelous depressifrons Stimp., op. cit., p. 223 [95], 1860. A. Milne-Edw., Arch. 



Mns. Nat. Hist., x, p. 343, 1861 ; Miss. Sci. Mex., v, p. 230, pi. xl, fig. 4, Aa, 



1879. Coues, Proc. Acad. Nat. Sci. Pliilad., for 1872, p. 121 (Fort Macon). 



Kingsley, Proc. Acad. Nat. Sci., Philad., for 1878, p. 5. Eankin, N. York 



Acad. Sci., p. 233, 1898. 

 Neptunus depressifrons Miers, op. cit., p, 181, 1886. Rankin, Annals N. Y. 



Acad. Sci., xii, p. 531, 1900 (Bermuda). 

 Portunus (Achelous) depressifrons M. J. Rathbun, Bull. Lab. Nat. Hist. Univ. 



Iowa, 1878, p. 27; Brach. and Macr. Porto Rico, p. 45, 1901. 



Figure 36. Plate XX, Figure 3. 



This is easily distinguished from most of the other Bermuda 

 species bj' the shorter posterior lateral spine, which is scarcely 

 longer than those in front of it. The front is not at all prominent; 



Figure 36. — Achelous depressifrons, resting ou shell-saud, to show protective 

 coloration. Nat. size. Phot. A. H. V. 



its four rostral or true frontal teeth are very short, blunt, subequal, 

 and close together ; most frequently the middle two are a little 

 smaller than the others; in other cases they equal or a little exceed 

 them in length. 



The inner orbital tooth is broad, with the frontal angle dentiform 

 and the middle of the margin a little concave, but not bilobed. 



