1 ? I BRITISH ENTOMOSTRACA. 



prominent teeth. The shell is white, and the surface is 

 grooved longitudinally, the grooves being marked with 

 rows of impressed punctures. 



Approaches near CYTHEBJNA SCROBICULATA ofMunster, 

 \ideltoemer's ' Cytherinen,' &c., in Jahrbuch f iir Mineral., 

 1838, t, 6, f. 1. ' 



I fab. Along witli numerous specimens of C. niyrescens, 

 marked as coming from Boston, Torquay, and Arran, one 

 single specimen of this pretty species was sent to me by 

 \V. C. Williamson, Esq. 



15. CYTHERE CONVEXA. Tab. XXI, fig. 3. 



Shell rounded, very convex, and presenting very much 

 the appearance of a small Cypraea, or Cowrie shell. The 

 surface is covered with numerous small, white, raised dots 

 or points, which are disposed in radiating rows round the 

 circumference, and the whole shell is of a white colour, 

 and translucid. The margin of the shell is somewhat 

 waved. 



Hab. Torquay, in sand; W. C. Williamson, Esq. 

 Tenby, in sand, T. R. Jones, Esq. 



Genus 2 CYTIIEREIS. 



( YniEREis, T. R. Jones, Entomost. of Crctac. Format .. I M' 1 

 CYTHERE, Minister, Jahrlmrh i'iir Mineralogie : 1 s ."- 1 ' 



Cornwl, Mi'ni. Gcol. Soc. France. 

 CVTHERIXA, Roemer, Jahrbuch, &c., 1S3S. 



/.'. HSS, Verstein. Hulim. Kividrfonn. 

 //"////,////..',, Transact, Manch. Lit. Sor. 

 CYH;II>IN \, i;<..^ii'i'f, Mt'ni. Soc. Roy. Liege, 1817. 



Animal unknown. Carapace valves or shell of an 

 almost regular oblong shape, the dorsal and \entral mar- 

 gins lying nearly parallel to each other. Surface of a 

 \ery irregular appearance, being wrinkled, ridged, and 

 lux-! with tuberchs, and crenulated or si rough toothed 

 on the margins. 



