12 TERTIARY ENTOMOSTRACA OF ENGLAND. 



and Pliocene Potamocypris trigonalis (Gythendeis, Jones, ' Monogr. Tert. 

 Entom.,' p. 46, PL II, fig. 2), but is narrower (lower) in the posterior region — 

 that is, it tapers more quickly with a strong slope along the postero-dorsal edge, 

 herein somewhat resembling P. tnberculata (Gytherideis, Jones, he. cit.). 



The genus lives in fresh and brackish waters. 



This specimen was collected (with some smaller specimens of possibly the 

 same species) by the Rev. P. B. Brodie, M.A., F.G.S., from an Insect-bed in 

 the marls above the Bembridge Limestone at Gurnet Bay. 



IV. AGLAIA, Brady, 1867.' 

 1. Aglaia ? cypridoides, Jones Sf Sherborn. Plate III, figs. 2 a, b, c. 



Aglaia ? cypridoides, Jones & Sherborn. Geol. Mag., 1887, p. 386. 



The genus Aglaia, G. S. Brady, one of the OyprididcB, is here made to 

 receive a fossil form on account of the similarity of shape and condition of the 

 valves. The muscle-spot, however, is like that of Bairdia. Our example is from 

 the Norwich Crag of Bramerton, and was collected by Mr. Clement Reid, F.G.S. 

 It has the usual curved form, and is delicately pitted. It is too broad in shape 

 for either A. ? glacialis, G. S. Brady, ' Post-Tert. Entom.,' p. 132, pi. xi, figs. 

 54 — 56 ; or A. ? obtusata, G. S. Brady, ' Report Challenger Ostrac.,' p. 35, 

 pi. xxx, fig. 8. (Mus. Pract. Geol.) 



V. CANDONA, Baird, 1850. 



1. Candona compressa (Koch). 



Ctpeis setigeea, Jones. Monogr. Tert. Entom., 1857, p. 12, pi. i, fig. 6. 

 Candona compeessa (Koch). Brady, Trans. Linn. Soc, vol. xxvi, 1868, p. 382 ; 



Jones, Geol. Mag., 1870, p. 155 ; 1888, p. 199. 

 Ctpeis incongedens, Bamd. Geol. Mag., 1887, p. 386. 

 To the localities of Berkshire and Cambridgeshire mentioned in the Mono- 

 graphs of 1857 and 1874, we have to add the Valley-drift of Fisherton, at 

 Salisbury (Dr. Blackmore's collection), the old land-drift at Chesilton, Portland 

 (Prestwich), the Chara-marl near Hitchin (Hill), and the gravels at Barnwell, 

 near Cambridge (Mrs. Hughes). (British Museum, &c.) 



1 « Lea Fonds de la Mer,' vol. i, p. 90. 



