A. E. Yen-ill I >cni /><><! Crustacea of Bermuda. 



389 



Young specimens of this form were not uncommon at Bermuda, 

 in masses of Sarf/n^nm, associated with Portunns Sayi and Planes 

 ut.iiiittux. It \vas also taken by the Bermuda Biological Station in 

 July, 10(o, in 8>-<i<txxni. 



The larger specimens are from Fort Macon (Yale Mus., coll. Dr. 

 Yarrow, 1S71); off Hatteras, in 13 fathoms (U. S. Fish Comm. 

 Steamer "Albatross," Oct., 1884, sta. 2285); West Florida (Coons 

 coll., Yale Mus.); and Brazil. 



Achelous Gibbesii (Stimp.). 



Lt<l>a Gibbesii Stimpson, Notes on N. Amer. Crust., i, Annals Lye. Nat. 

 Hist. N. York, vii p. 57 [11]. 



Achelous Gibbesii Stimpsou, Notes, I, op. cit., vii, p. 22 [94], 1860 (Beau- 

 fort, N. C.). 



Xepttuuts Gibbesii A. M.-Edw., Nouv. Arch. Mus. Nat. Hist. Paris, x, p. 326, 

 pi. xxxi, figs. 1, la, 16, 1861 ; Miss. Sci. Mex., p. 213, 1879. 



Achelous Gibbesii Smith, Ann. Rep. U. S. Comm. Fish and Fisheries, for 

 1882, p. 349, 1884 (off Hatteras); op. cit., for 1885 [p. 30], 1886 (off Hatteras), 

 Kiugsley, Proc. Philad. Acad., for 1879, p. 398. 



Portuniift (Achelous) Gibbesii M. J. Rathbun, Amer. Naturalist, xxxiv, p. 140, 



1900. 



FIGURES 34, 35. 



34 





Figure 34. Achelous Gibbesii, young, x \\. After A. M.-Edw. 

 Figure 35. The same, abdomen of $ , enlarged. After A. M.-Edw. 



This species, which is introduced here mainly for convenient com- 

 parison, is not yet definitely recogni/ed as native of Bermuda. The 

 few specimens most resembling it are too young for positive deter- 

 mination. 



It has four small, nearly equal rostral teeth, besides the obitals, 

 which are slightly bilobed (scarcely at all in Hie young); the merus 



