NO. 1307. JAPANESE STALK-EYED CR USTA CEANS—RA THE UN. 5 1 



can, viz, P. vulgaris on page ^48, and J\ tenidcorniH on page 249. 

 Milne Edwards'' refers to both of Say's species, to P. vti/f/aris on])Sige 

 394, and to '''' Palemon frnn!ro><trr'^ on page 395, but his footnote 

 references "(2)" and "(3)" to Say's descriptions, instead of being placed 

 correctly in the text, i. e., (2) after P. vulgaris and (3) after P. tenui- 

 /•ostre, are made dependent, (2) on I\ longirosfrls and (3) on 1\ vulgaris. 

 Tlie name P. longlrostrls Milne Edwards, occurring on p. 394, was 

 ciumged by him in Errata, vol. Ill, p. H3S. 1S40, to P. sttyliferux. a 

 name apparently overlooked by subsequent authors, l^ut which uuist 

 stand for that species. The name I\ longirostris should be used for 

 the species so designated by Milne Edwards on p. 392 {— P. edvMrdsii 

 Heller). 



Ortmann ^ makes 7*. japonic us ;i variety of /*. xtyliferus. V)ut it is 

 distinguished as follows: P. japouicus has no dorsal spines on the ros- 

 trum except at the base, while 1*. styliferux has 2 or 3 on the termi- 

 nal half. P. jajH/nieu.s has 4 toO ^'entral spines, I\ styliferus 8 to 10. 

 In P. japouicus the sixth segment of the pleon is nearly two-thirds as 

 long as the carapace (rostrum excluded); in /•*. stijliferus it is shorter, 

 barely more than half the carapace. In P. jajKmicus the carpus of 

 the second pair of feet is as long as the meru.s or the fingers, while in 

 P. .sfyliferus the carpus is considerably shorter than merus or lingers. 



There are in the U. S. National Museum a number of specimens of 

 P. styliferus from Kurrachee, India, collected b}^ Francis Day. 



PALiEMON PAUCIDENS de Haan. 



Palemon ixiuciden-s de Haan, Fauna Japon., C!ru.st., 1849, p. 170, pi. xlv, fig. 11. 

 Leander paucidens Stimpson, Proc. Acad. Nat. Sci. Phila., XII, 1860, p. 40 [109]. 



Aomori, Rikuoku; Matsushima, Rikuzen; Misaki, Sagami; Lake 

 Biwa, Matsubara. Omi (abundant): Kawatana; Kurume; Nagasaki, 

 Hizen. 



Korea, P. L. Jouy coll.: Fusan: Gensan, brackish streams flowing 

 into the sea. 



The rostrum has 5 to 6 teeth above (1 on carapace), 2 to 3 below, 

 and is usually bitid at extremity; it extends about to the end of the 

 acicle. The branches of the outer flagellum of the antennulse are 

 joined for about 8 segments or less than half of the length of the 

 shorter branch. In fulh^ developed specimens the outer maxillipeds 

 ma}^ or may not exceed the antennal peduncle, and the carpus of the 

 second pair of feet usually exceeds the acicle. 



Dimensions. — A large female measures 60.5 mm. long. Several 

 hundred specimens were taken at Lake Biwa, all smaller than those 

 from salt water; a female with ova measures 38 mm. Stimpson'' 

 records its occurrence in fresh water, in rivers near Simoda. 



a Hist. Nat. Crust., II, 1837. 



&Zool. Jahrb., Syst., Y, 1891, p. 519. 



'•Proc. Acad. Nat. Sci. Phila., XII, 1800, p. 40 [109]. 



