WORMS. TESTACEA. 65. Area. 



2?r 



Modiolus. Shell oblong ftriate, and angular anteriorly. 



Inhabits the Mediterranean ; refembles Mytilus modiolus, and is 

 about the fize of a large bean : wkhin white or pale violet, 

 without yellowifli : hinge elongated : valves anteriorly deeply 

 filiate, behind a little longer than the beaks. 



fttta. Shell ovate pellucid fubftriate, with a diftincl: prominent 



anterior flope: hinge ciliar. 

 Inhabits the Mediterranean : white finely polifhed and very mi- 

 nute, nearly triangular with fine tranfierfe femilunar ilriae : 

 beaks placed in the middle: ilope tranfverfely ilriate : teeth 

 fubulate and very- fharp : margin without teeth within and 

 without. 



0-vatai Shell ovate with decuiTate ftriae, fnowy and covered with a 

 ruffet-brown epidermis or fkin: margin gaping. 

 Inhabits the Red Sea. Chemn. conch, 7. tab. $$.fig. 53$. 

 Shell large with an undulate grooved and ilriate pofterior exca- 

 vation ; probably not of this family. 



JPellucida. Shell pellucid brittle, rounded at each end, obfoleiely ilriate: 

 teeth of the hinge very fharp, 

 Spengler Catal. 1. tab. \o* fig. 11. 

 Chemn. conch. 7. /. 55./". 541. a, b. 

 Inhabits Nicobar ijlandsi thin, flraw-colour or brown, within 

 brovvnifh. 



tip- 



Rojlrata. Shell a little convex with tranfverfe ftrise ; the hind-part 

 rounded, fore-part extended into an acute beak. 

 Martin. Bejch Naturf. 3. tab. J. Jig' 1 7, I 8. j 



Schrezt. Jlufconch. tab. 9. jig. 2. ffp o£ f *~ ' ' 



Chemn. conch. 7. tab. $$*£&%#$}* a > b. <* ** 

 Inhabits the Baltic and Norway Seas ; refembles the laft. 

 Shell \ an inch long, 1 { broad, covered with a greenifh fkin : 

 beaks minute and bent back. 



Sriata. Shell lentiform, with very numerous decuiTate ftrize, late- 

 ritious and reddiih within : pofterior excavation trian- 

 gular: hinge arched. t < w^jt-si U- r?3. 



Chemn. conch. 7. tab. 58. M <*\M '^^ U 



Inhabits the Red Sea : an inch broad^ and fomething longer. 



Pukhella. Shell roundifh, biradiate, with tranfverfe arched ftrix. 

 Inhabits— RumpfMuf. tab. tf.fig. 1, 



I12 



Afra, 



