WORMS. TESTACBA. 58. Tellin*. i9 j 



orange, fometime? marked with undulate rufous tpW} tfo§ 

 ftrise incline obliquely towards the outer margin like the hm§ 

 at the ends of the hngers, which gives it the appearance @f 

 being fpirally ftriate. 



* Cwmm* Shell globular glabrous horn-colour, with a tranfverfe |f$$yg ( 



Pennant Brit. ZqoJ iv. tab. 49 'fig- 36. 



Lifter, tab. }$^fig- 14. Gua,t. left. t. j.f B, C. 



Lifter an. Aug/, tab. 2 fig 31. App. tab. I. fig 5. 



\Argen<v. Conch, ta^. 27. fig. 9. Zoom. t. 8. f. I p. 



Schrtzt. Elujconch. tab. S.ftg. 3-^-5: » 



Chemn. conch. 6. tab. l$.ftg- I 33* A, b. 



Inhabits ponds and freih water of Europe : fize of a pea. 



■SW^ pellucid polifhed, yery finely ftriate acrofsj within blyej|]}* 

 white, without white or pale or blueilh-afli, with tranjygffg 

 black curves one of which is more djftjnft : about the f}%£ §f 

 a pea, often more than twice as large : lateral teeth of the JU8§§ 

 elongated, middle-ones hardly any. 



flaeuflrtj. Shell rhombic flattifti glabrous, with an acute protuberaj^g, 



Chemn. conch. 6. tab. 13. jig. 135. 



Inhabits pools or marines of Europe : 6 lines long and 4 bF§2if 

 viviparous: jhcll brownifh, the back of the valves. ciner§@USf 

 the margin white, within white; the youger ones cnilf§\y 

 white and diaphanous : hinge \yithcmt: middlp teeth ? jajgfii 

 ones 6 obfolete. 



tfmxjca, Shell fbmewhat heart-fhaped, tranfverfely grooved, with 8fl 

 obtule protuberance. 



Qhemn. conch. 6. tab. 13. fig. 1 34. 



Inhabits pools and ditches of Europe : 1 — 5 lines broad. 



Shell lefs globular than T> cornea, within glabrous and blujlfllj 

 without white brown or yellow with a blackifh rib pr |W@| 

 the younger ones entirely white and pellucid v hinge Wflh 9 

 middle teeth in each valve and a lateral one each ride. 



iluminalis. Shell triangular gibbous and tranfverfely ftriate. 



Inhabits the Euphrates. Mull. Verm. 2. p. 205. n. 390. 



Shell thick hard opake, broader towards the hinge on the f§r§* 

 part: outwardly green with imbricate flrizs parrallel with thi 

 aperture, within blue: hinge with 6 middle teeth, the Jalgfal 

 each fide long and with the receiving grooves crenulated_; 



fhuiunea, Shell triangular gibbous tranfverfely ribbed. 

 Mull. I'erm. terr. ei ftwv. 2 t p. 206. n. 391. 



Inhabits the river which walhes Canton in China, 6-?*8, !lnj§ 

 long and broad: opake, without green, within whitilh mar-kid 

 wi:h a black femicircle : hinge as in the former. 

 - .Fluviapjte, 



