NO. 1307. JA PA NESE ST A LK-E YED CR USTA CEA NS—RA THB UN. 5 3 



D///u'/is/(>/is. — Female with ova: Leno^th, 55 nun. ; leno^th of carapace 

 and rostrum, 23.7 mm.; len^-tli of I'ostrum, 12. T mm. 



Localities. — Aomori, Kikuoku (type locality, Cat. No. 2(»i(>2); Mat- 

 sushima, Rikuzen; Nagasaki, Hizen. ALso collected by P. L. Jouy in 

 Korea, at Fusan, Gensaii, and Chemulpo. 



This species in appearance much resembles /\ sen'ifer, but differs 

 in havino", as a rule, more rostral teeth, broader acicle. lonoer fingers 

 of second chelipeds, longer dactyls of last three pairs. In the young 

 the rostrum may be a little convex abo\'e, the palm and lingers of the 

 second pair sul^equal. 



PALiEMON PACIFICUS (Stimpson). 



Leander pacificus Stimpson, Proc. Acad. Nat. Sci. Phila., XII, 1860, p. 40, 

 [109].— Dk Man, Notes Leyden Mns., Ill, 1881, p. 137. 



Rostrum extending beyond antennal scale for about one-third of its 

 length, stronglv upturned toward its extremity, armed with 7 to 8 

 teeth above (2 or 3 on carapace), 4 or 5 below, tip usually trifid. 



The filaments of the outer flagellum of the antennulte are united for 

 from 10 to 12 joints; the free end of the short filament has 2S to 36 

 joints; its outer margin or that which fits against the longer filament 

 is strongly serrate. 



Otherwise this species is much as in I\ affints Milne Edwards. 



Misaki, Sagami; Wakanoura, Kii; Nagasaki, Hizen. 



BITHYNIS NIPPONENSIS (de Haan) . 



Palemon nipponeriMs de Haan, Fauna Japon., Crust., 1849, p. 171. 

 Palxmon nipponensis Ortmann, Zool. Jahrb., Syst., V, 1891, p. 7^?>, pi. xlvii, 

 figs. 4 and 4z, and synonymy. 



Wakanoura, Kii; Chikugo River, Kurume, Chikugo; Kurume, July 

 23 (many specimens). 



BITHYNIS LONGIPES (de Haan). 



Palemon Ion(jipes" de Haan, Fauna Japon., Crust., 1849, p. 171. 

 Pahemon longipes Ortmann, Zool. .lahrb., Syst., V, 1891, p. 715. 



Kawatana, Jul}" 22 (many specimens); Nagasaki, Hizen. 



The two foregoing species are very closely related; they ma}" be 

 separated by the following characters, which are not absolutely 

 constant: 



In £. nipponensis the rostrum is usually nearl}^ straight and bears 

 12 or 13 teeth above; in J3. longipes it is usually more arched and has 

 10 or 11 teeth above. 



In B. nipponensis, adult, the fingers of the second cheliped are 



« I have given a new name, Palsemon ortmanni, to P. longipes (Ortmann) = Leander 

 longipes Ortmann, not P. longipes de Haan. There is in the U. S. National Museum 

 a specimen of P. ortmanni from Tsushima Island, .Tapan, collected by P. L. Jouy. 



