Vol. 50.] ' KH-EriC AND LTASSIC OSTRACODA OF BRITAIN. 167 



The specimen under notice is in a friable cream-coloured lime- 

 stone full of Ostracoda (Ct/tliera>'?) and without Naiadites, from the 

 Rev. P. B. Brodie's Collection, labelled ' White Lias, Bristol.' 

 Figs. 11 and 12 accompany it. Collected some years ago, it was 

 probably from one of the whitish beds of the Lower Lias somewhere 

 near Bristol, perhaps at Bedminster. 



7. CrTHERE Wilsoni, sp. nov. (PI. IX. figs. 11a, 11 6, 11 c.) 





Length. 



Height. 



Thickness of carapace. 



Fig. 11a .. 



. . 1-2 



•75 



— mm. 



Fig. lib .. 



. . 1-25 



— 



•6 mm. 



Fig. 11 c . . 



— 



•8 



•6 mm. 



Carapace suboblong, smooth, elliptically rounded in front, smaller 

 and more symmetrically rounded behind. Anterior hinge well 

 marked ; dorsal edge rather oblique, and curving at the lower hinge 

 to meet the narrow end of the valve ; ventral edge somewhat 

 sinuous, projecting a little at the front third (fig. 11 a), but slightly 

 incurved behind it, and deeply sunken along the junction of the 

 valves (figs. 116, 11 c). Edge view, subacute-oval ; end view, ob- 

 cordate. 



This is abundant in the piece of friable limestone which also 

 contains figs. 10 and 12. Collected, and formerly labelled ' White 

 Lias, Bristol,' by the Rev. P. B. Brodie. Probably not from the 

 Rhsetie White Lias, but really Liassic. I name it in honour of 

 Mr. Edward Wilson, F.G.S., whose researches in the geology of 

 Bristol and its vicinity are well known, and who has obliged me 

 with much valuable information whilst preparing this notice of the 

 local Ostracoda. 



8. Cythere, sp. ? (PI. IX. fig. 12.) 



Length. Height. Thickness of carapace. 



1*7 mm. — '75 mm. 



The dorsal aspect of an embedded carapace of a Cythere is here 

 seen, such as fig. 11 would probably possess if it were of a larger 

 size. The left valve is broken at each end ; but the right valve, 

 excepting that the hinder hinge has been chipped out, shows a 

 perfect dorsal aspect. 



It is in the friable whitish limestone labelled ' White Lias, 

 Bristol ; ' probably Liassic, not Rhaetic. Collected by Mr. Brodie. 



9. Cytheropteron Brodiei, sp. nov. (PI. IX. figs. 13 a, 13 6, 

 13 c, 13 d.) 





Length. 



Height. 



Thickness of carapace. 



Fig. 13a .. 



,.. -6 



•45 



— mm. 



Fig. 13 6.. 



.. -6 



— 



— mm. 



Fig. 13 c 



.. -6 



— 



•4 mm. 



Fig. 13 d . 



— 



•375 



•45 mm. 



