108 CAECINOLOGICAL NOTES ; 



Palsemon longimanus Fabricius. 



P. longimanus Fabr., Suppl. Ent. Syst., p. 402, 1798. 

 P. lar Fabr., 1. c., p. 402, 1798. 



P. ornatusOliv., Encyc. viii, p. 660. Edw. Hist. Nat Crust., ii, 396, 1837. 

 These three descriptions were doubtless drawn from individuals of 

 the same species, and of the two Fabrician names I have chosen 

 longimanus to stand for the species, as it is to a certain extent 

 descriptive. 



Palsemon ohionis Smith. 



This species was described by Professor Smith from specimens 

 taken in the Ohio river at Cannelton, Indiana. Prof. S. A. Forbes 

 (Bulletin 111. Mus. Nat. Hist., i, p. 5, 1876) reports it from several 

 places in Illinois and, on the authority of boatmen, from St. Louis to 

 New Orleans, growing larger towards the south. I have seen speci- 

 mens in the museum of the Boston Society of Natural History from 

 Milliken's Bend, Miss. (C. A. Shurtleff), and in the Museum of the 

 Academy of Natural Sciences of Philadelphia, from Vicksburg, Miss. 

 (L. C. Eice) and Mississippi (Guerin-Meneville, types of P. sallei 

 Guer. MS.). 



Palsemon sinensis Heller. 



Specimens of this species, which was originally described from 

 Shanghai, were brought from Japan by Prof. E. S. Morse and are now 

 in the museum of the Boston Society of Natural History. 



Palsemon acanthurus Wiegmann. 

 P. forceps Milne-Edwards. 



Three specimens of this species in the Museum of the Peabody 

 Academy brought by J. A. McNiel from the west coast of Nicaragua. 

 It has hitherto been known only from the eastern shores of this 

 continent. 



Genus LE ANDER DESMAREST. 

 Leander hammondii n. s. PI. I, fig. 2. 



Carapax smooth; rostrum elongate, a fifth longer than carapax and 

 considerably recurved, its dorsal margin armed with nine or ten nearly 

 equidistant teeth, the two posterior being on the carapax; inferior 

 margin six-toothed, the apex bifid. Last two joints of antennular 

 peduncle subequal, and together about equalling the preceding joint. 

 The two basal joints armed externally with a slender spine, each of 

 which extends beyond the middle of the succeeding joint. Three 



