se 
Report on the Crustacea Schizopoda of Trelani. 237 
Leptomysis lingvura, G. O. Sars. 
Leptomysis Marion’, P. Gourret, ‘‘ Revision d. Crust. podophthalm. Golfe de Marseille.’—Ann. Mus. 
Hist. Nat. Marseille, t., 1889, Mem. v., p. 185; pl. xviii., figs. 8-14. 
Survey.—Station 118. Ballinskelligs Bay, 382 to 28 fathoms, soft mud. 
21st August, 1890. 
Museum, Dublin.—No. 195, 1895. Roundstone. 
Previous Irish Records.—Lough Kay, Valentia; Dingle Bay (A. O. W.*). 
Distribution. —Firth of Forth (T.8.): Loch Fyne; Northumberland; Durham; 
Starcross (A. M. N.*): Irish Sea, Port Erin and Colwyn Bay (A. O. W.): Plymouth. 
Norway; Boulonnais; Mediterranean; Black Sea (A. M. N.*): N.-W. France 
(Pruvot. L. Marioni.). 
While Leptomysis sardica (G. O. Sars) is considered by Norman to be merely a 
small race of L. lingvura, it would appear, from the remarks of the same observer, 
that typical examples of the latter occur in the Mediterranean (Adriatic), as well 
as in the Atlantic. We see no reason to doubt the accuracy of Norman’s views 
as to the identity of the two species. 
We further believe that Z. Marionz, of Gourret, is not to be distinguished from 
L. lingvura by any characters of specific moment. It does not appear that the 
author was acquainted with Sars’ Norwegian monograph, nor is it certain that 
the distinctions which are drawn between ZL. sardica and L. Mariont are based 
on the examination of a series of the latter sufficiently numerous to eliminate 
the probability of the occurrence of intermediate varieties. L. sardica appears to 
have been known to Gourret only from the figures of Sars, and in the case of an 
appendage not figured for LZ. sardica, comparison has been somewhat futilely 
instituted with LZ. mediterranea. ‘The mandible is figured and compared with 
that of LZ. mediterranea, as figured by Sars. ‘The difference would be the more 
remarkable if Gourret’s drawing were not obviously taken from a specimen 
distorted in manipulation. In the position in which they are shown the anterior 
denticulations of the cutting edge have no very obvious function. We have 
examined the mandibles of Z. lingvura, and consider it possible that Gourret’s 
figure 8, pl. xvui., may have been based on a distorted appendage of similar 
structure. The anterior denticulations, though very different in position, are 
not widely dissimilar from those of ZL. Marioni (as figured). The distinctive 
characters of the outer process of the antennule in L. Marioni do not appear to us 
of much importance, and, in so far as concerns the length of the first joint of the 
process, Gourret’s species would seem to resemble L. lingvura. 
We suppose that a comparison of the first maxille of L. Marioni and L. 
sardica contains a clerical error, whereby the latter species has been substituted 
TRANS. ROY. DUB, SOC., N.S. VOL. VII., PART VII, Y IL 
