50 CRETACEOUS ENTOMOSTRACA. 



7. Cytheeella obliquirugata, sp. nov. Plate III, fig. 73. 



Length "42 ; height "22 mm. 



A neat, small, ovate-oblong Gytherella, bordered with a slight raised rim, and 

 bearing some oblique, parallel, sinuous riblets, tapering at their ends. One (the 

 middle and largest of the three) is bent on itself in the postero-ventral region, 

 turning up to the little normal sub-central pit which interrupts this branch, and 

 thus makes four tapering, oblique, and more or less parallel riblets. 



Cytherella denticulata, Bosquet ('Mem. Comm. geol. Neerlande,' vol, ii, p. 51, 

 pi. V, fig. 1), from the Chalk of Limbourg, has some oblique ridges, but it has also 

 one straight marginal ridge and a truncated posterior edge. 



Locality. — Chalk, Winchester. Collected by Mr. A. Angel, jun. 



8. Cytherella? Mantelliana, Jones. Plate III, figs. 19 — 21. 



CiTHEEELLA? Mantelliana, Jcwes. Monogr. Entom. Cret., 1849, p. 32, pi. vi, 



figs. 22 a— c; and Geol. Mag., 1870, 

 pp. 76, 77. 



Length '5; height -25; thickness '15 mm. 



We have nothing to add to the former description of this unique carapace from 

 the Charing Detritus. 



i 



