44 Notices of Memoirs — Prof. T.R.Jones — Fossil Phyllopoda. 



Lingula-flags. Hence we may add " Lingiilocaris^' to *' Hijmenocaris" 

 for that formation at p. 425 of our Twelfth Report (fifth liue from 

 the bottom). 



§ IX. 1896. Devonian species of Ceratiocaris (?). — In the 

 " Monograph of the Devonian Fauna of the South of England," 

 Paleeont. Soc, vol. iii, part 1, 1896, the Rev. G. F. Whidborne 

 describes and figures three obscure casts of Ceratiocaris, one G. (?) 

 suhquadrata, sp. nov., p. 7, pi. i, fig. 5, from East Anstey ; another, 

 Ceratiocaris (?) sp., p. 8, pi. i, fig. 6, from Sloly ; and the third, 

 somewhat indistinct specimen, namely Ceratiocaris (?) sp., p. 8, 

 pi. ii, fig. 12, from Croyde. 



§ X. 1896. Entomocaris and Ceratiocaris. — A collection of 

 Ce7-atiocaris-l\^e Crustaceans fx'om the Lower Helderberg Formation 

 (Upper Silurian), near Waubeka, Wisconsin, has afforded Mr. R. P. 

 Whitfield, of the American Natural History Museum, New York, 

 the opportunity of determining two new species of Ceratiocaris, and 

 a new genus (Entomocaris) , allied to Ceratiocaris, but differing froui 

 it by the carapace-valves being '* strongly curved in front and 

 behind on the dorsal margin," and by the posterior margin not 

 being truncate, as in Ceratiocaris, but obtusely rounded. Jintomo- 

 caris Telleri, Whitfield (p. 300), is figured in pi. xii, of full size, 

 but slightly distorted by pressure. Including the four exposed 

 bodj'^-segments and the trifid appendage, it is about 21 centimetres 

 (about 8 inches) long; and the valves are about 13^ centimetres 

 long by about 6^ high. Some indications of the swimming-feet 

 attached to the body are visible where one valve has been partially 

 broken away from the internal cast. Some mandibles, supposed to 

 belong to this species, are shown in pi. xiv, figs. 1, 2 ; and the caudal 

 appendages in fig. 9. 



Ceratiocaris Monroei, Whitfield (p. 301, pi. xiii, figs. 1-5, and 

 pi. xiv, figs. 3-8), is carefully described from one nearly perfect 

 and an imperfect specimen, together with body-segments, caudal 

 appendages, and some mandibles. The carapace- valves seem to 

 have been about 7^ centimetres long and 4 high. 



Ceratiocaris poduriformis, Whitfield (p. 302, pi. xiv, fig. 10), is 

 represented by a small specimen of abdominal segments and caudal 

 spines. 



§ XI. 1896. EcJiinocaris Whidbornei, J. and W., noticed in our 

 Seventh Report (for 1889), p. 63, has been redescribed and refigured 

 by the Rev. G. F. Whidborne in the " Monogr. Devonian Fauna, 

 S. England," Pal. Soc, vol. iii, part 1, 1896, p. 6, pi. i, fig. 3. 



Within the last few months Ananda K. Coomary-Swamy, Esq., of 

 Warplesdon, has fortunately obtained a very interesting specimen of 

 this Echinocaris from the Sloly mudstone, showing on the two 

 counterparts of the little split slab, two individuals, each having the 

 same characters as the specimen first described in the Geological 

 Magazine, Decade III, Vol. VI, 1889, p. 385, PL XI, Fig. 1. 

 Though rather narrowed by oblique pressure, the valves are equal 

 in breadth to those of the first specimen. An additional feature of 

 interest is seen in some body-segments, five in one individual and 



