141 



constantly a sinall apical tootli, tliat forins tlic n])per part of tli(> 

 bifid apcx, qiiite exceptioiially twu apical tcetli occur. Iii all the 

 spcciiiions the rostnini slightly reache.s beyund the aiiteniial seales 

 by 0,5 tü 2,5 iiini. The proximal part of' the rostruin is g-eiier- 

 ally a little directed downwards and the distal part more or less 

 upwards, so that the apex of the rostrum is situated in the same 

 Inn'izontal line as the upper marg'in of the eephalothorax, some- 

 times below, often, however, above that nuirgin. 



In most specimens, especially those of medium size and youiig, 

 the shorter ramus (Fig. 2r) of the outer auteniiular Hagellum 

 reaches only bij one-tJiird to oHe-half its length, tlie fused portion 

 included, beyond tlie apex of rostrum ; in 4 adult female and in 2 

 young- specimens, however, about two-tliirds of the shorter i-amus 

 reach beyond it, so that in tliese specimens nearly the wliole free 

 j)ortion of the ramus is situated before the apex of rostrum. 



The mandibular pal]i (Fig. 2/') di fiers from Stani.ey Kemp's 

 figure 21) in his paper „Tiie IJecajJoda natantia of the Coasts of 

 Ireland" of 1910, by the 2^ joint being slightly longer in pro- 

 portion to the 8*^ or terminal one ; the relative width or thiek- 

 ness of the latter is somewhat variable. 



A female without eggs, long 05 mm., is infi'sted by a /)o/>///v<x. 

 General distribution : Black Sea (Bays of Sebastopol, Feodossia, 

 Novorossiisk, Suchum and Kertsch) according to Rathke and 



CZERNIAVSKY. 



Lrander ((dapcrsHs (Ivatiike) var. Fabricü (IIatiike). 

 PI. XI, Fig. 2>j—2J and PI. XH, Fig. 2m-~2p. 



Fdhu'inon F(fhn'c//\ II. Ratiike, Beithige zur Fauna Norwegens, 

 in: Verhandl. der kais. Leop.-Carol. Akad. der Naturforscher, 

 Bd. XII, 1843, p. 0. 



Palaemon recfirostris^ E. G. Zaddach, Synopseos Crustaceorum 

 Prussicorum Prodromus, Regiomonti 1844, p. 1. 



Palaemon Leackii, Th. Bell, A History of the British Stalk- 

 eyed C^rustacea, London 1853, p. 307. 



