TTeber einige Sůsswasser-Amphipoden. 5 



21. 1888. Wrzešjíiowski A., O trzech kielžach podziemnych. Pami^tnik 



fyziograficzny. T. VIII. p. 221—330. Tab. VI— XVI. 



22. 1890. — , Ueber drei unterirdische Gammariden. Z. f. w. Z. Bd. 50. 



pp. 600—725, Taf. 28—32. 



23. 1888. Stebbing T. R. R., Report on tlie Ampliipoda collected. 



1873—1876. by H. M. S. Challenger during tlie years 

 Vol. XXIX. p. 681. 



24. 1893. Della Valle, Gammarini del Golfo di Napoli. Fauna u. Flora XX. 



25. 1894. GiiiLTON Charles, The subterranean Crustacea of new Zea- 



lad: Witli some generál remarks on tlie faune of Caves 

 and wells. — Transact. Linnean Society London. 



2. Geschichtliches, 



Crangonyx wurde zuerst in England gefunden und von Spence 

 Bate unter der Diagnose bescbrieben : 



Crangonyx 



Superior antennae not longer than tlie inferior, liaving a secondary 

 appendage. Gnathopoda subequal, not liaving large propoda. Pereio- 

 poda subequal. Posterior pair of pleopóda unibranched. Telson single, 

 entire. 



Crangonyx subterraneus (PÍ. XXXII. fig. 6.) 



Pleon having the postero — inferior angle of the tliree anterior seg- 

 ments produced to a point, and the antero-inferior angle furnished 

 with three minuté hairs. Eyes imperfectly formed, lemon-colour. Su- 

 perior antennae about one-fourth the length of the animal; peduncle 

 having the first joint shorter than the succeding; flagellum not longer 

 than the peduncle, secondary appendage consisting of one long and 

 one short articulus ; mandibles having the joints of the appendage 

 short and distally increasing. First pair of gnathopoda having the pro- 

 podos quadrate ; palm slightly convex, oblique, armed with a few 

 forked spines. Second pair of gnathopoda longer and more slender 

 than the first, having the propodos long-ovate ; palm very oblique 

 and imperfectly defined, armed with a few spines, each carrying 

 a subapical cilium; dactylos with a small internal cilium near the 

 apex. Pereiopoda subequal, unguiculate ; three posterior pairs having 

 the basa ovate, and posteriorly fringed with short équidistant cilia. 

 Three posterior pairs of pleopóda subequal, furnished with strong 



