Decapod Crustacea of Bermuda, Part II. 121 



This species is perhaps the Bermuda form called 5. lavirnaints. 

 var. longicarpus, by Miss Rathbun. At least, some of our speci- 

 mens were so labelled by her. But it seems to be quite distinct 

 from 5\ lavimanus of Europe. She stated that it had the rostrum 

 and ocular spines slender and acute, and the antennular and 

 antennal spines much as in minus. 



Specimens of this species were also in the lots labelled and 

 returned as A. minus by Kingsley, and it may be one of the 

 "varieties" alluded to by him. 



Synalpheus neptunus (Dana). 



Alphcus neptunus Dana, Crust. U. S. Expl. Exped., i, p. 553, 1852, pi. 35, 



fig- 5, 1855. 

 Synalpheus neptunus Coutiere, Ann. Sci. Nat. (8), Zool., ix, p. 15, 1899. 



Not of M. J. Rathbun, op. cit., p. no, 1901. . 



PLATE XXV, FIGURES 2, a d. After Dana. 



This oriental species somewhat resembles S. minus as shown by 

 Dana's figures, here reproduced. Dana did not describe the telson. 

 The frontal spines and the antennular and antennal spines are 

 similar, though all these spines are unusually large and long. The 

 ocular spines are longer and more acute. The most notable 

 differences are the absence of the upper lateral spine of the 

 basicerite and the form of the larger chela, which is relatively 

 shorter and thicker, more oblong and more swollen medially 

 beneath; its palm is scarcely twice the length of the dactyl, which 

 is strongly curved. 



Smaller chela of the first pair is peculiar. Its movable finger 

 is flattened and expanded beyond the base, thus becoming spatuli- 

 form, and has a groove armed with a row of hairs close to the 

 edge. The antennal scale is rudimentary and its spine reaches to 

 about the proximal third of the last antennular segment. The 

 ambulatory legs are biunguiculate, with very small hooks. 



Sooloo Sea, 6 l / 2 and 9 fathoms, and Fiji Islands (Dana) ; Red 

 Sea (Heller, Paulson). Miss Rathbun identified with it some 

 specimens from Bermuda and Porto Rico, though she noted some 

 important differences. I have myself seen no Bermuda specimens 

 referable to Dana's species. 



According to Coutiere, 6\ neptunus Dana belongs to a different 

 section (biunguiculatus group) of the genus, entirely oriental in 



