Jones and Woodward — On Fossil PhyUopoda. 293 



In some features this carapace resembles Emmelezoe elliptica 

 (M'Coy), Monog. Foss. Phyll. Part I. 1888, p. 68, pi. 8, fig. 1 ; 

 but it is still more closely allied to Elymocaris siliqua, C. E. Beecher, 

 Second Geol. Surv. Pennsylvania, P.P.P. 1884, p. 13, pi. 2, figs. 1 

 and 2. In size it is nearer tbe latter, which measures 26 by 10 mm., 

 whilst the former measures 32 by 13 mm. It differs from both in 

 being evidently more attenuate posteriorly (though not quite 

 perfect) ; and more symmetrical in the elliptical curve of the 

 ventral margin ; and from Emmelezoe particularly in its frontal 

 angle. As in Emmelezoe, there are no nodular eminences near the 

 eye-spot. 



Its nearest ally, however, is evidently Elymocaris capsella, Hall 

 and Clarke (Palceont. New York, vol. vii. 1888, p. 181, pi. 31, 

 fig. 4), as pointed out to us by Dr. Hinde when communicating 

 the specimen ; and, although this is smaller (15-5 by 5 mm.), its 

 proportions are not far from being the same ; and its tapering 

 posterior extremity, its striate ornament, and general shape give 

 a close resemblance to our Fig. 7. The greater fulness of the 

 antero-ventral, and less convexity of the postero-ventral, margin 

 in E. capsella, and the steeper front edge, with its antero-dorsal 

 spike, distinguish it from the species before us ; besides which the 

 latter has a more prominent ocular spot. 



Regarding it, then, as belonging to Elymocaris, and distinct from 

 the published species of the genus, we name it E. Hindei after 

 Dr. G. J. Hinde, V.P.G.S., who collected it many years since at 

 Arkona, Ontario, Canada, from the Hamilton Group of the Middle 

 Devonian Series. 



6. EsTHERiA Dawsoni, Jones, 1870. 



Acadian Geology, 1868, p. 256, fig. 78d; Geol. Mag. 1870, p. 220, PL IX. 

 Fig. 15 ; ibid. 18"76, p. 576 ; ibid. 1878, p. 101, PI. III. Fig. 2. 



We have just now received from Sir William Dawson, F.R.S., etc., 

 of Montreal, a fossil Estheria, which, though imperfect, corresponds 

 in general characters with E. Dawsoni, Jones, and moreover exhibits 

 an interstitial pitting or coarse reticulation, such as is present in 

 several known Estheria, but rendered obscure by fossilization. 

 "The shell enclosed" (writes our friend, in a letter dated April 28, 

 1894) " came to me, with some fossil plants, from beds in Nova 

 Scotia, which I suppose to be Lower Carboniferous, but which some 

 hold to be Devonian." He suggests that it looks like the species 

 here referred to. 



E. Dawsoni has been found in the Lower Carboniferous series at 

 Horton in Nova Scotia, and in the Lower Carboniferous of Scotland. 



EXPLANATION OF PLATE IX. 

 Fig. 1. Estheria Draperi, sp. nov. la, carapace with the left valve, partly 



preserved, lying upwards ; enlarged 2 diameters, lb, outline, natural size. 



Ic, portion of the ornament, magnified 25 diameters. Eastern side of the 



Platberg, Natal. 

 Fig. 2. Estheria Stowiana, sp. nov. 2a, right valve, magnified 15 diameters. 



2b, outline, nat. size. Eastern side of the Platberg, Natal. 



