Descriptive. Catalogue of the British Testacea. 41 
Testa vix magnitudine fabze equinze, crassa, rudis, sordide alba, transversim 
striata et rugis antiquata, extremitate altera _ productiore subtruncata. 
Epidermis subfusca. Valvule ‘ingequales, superior minor. Cardinis 
dens unicus crassus triangularis i in alterius teste foveola excipitur. 
—: oe 
er. Dentes laterales nulli. 
This shell is but indifferently figured by Walker.in. his 
Testacea minuta rariora. It has been found at Sand- 
wich by Mr. Boys, and on the coasts of Cornwall and 
Devonshire by Mr. Montagu. 
13. 
bidentata. M. testa subovali compressa, cardinis dentibus antror- 
sum porrectis, obliquis. . - : 
Montagu Test. Brit. p. 44. 
Habitat in mari, testas perforans. 
Testa minuta diametro 4 poll. tenuis, sordide. alba,- levis. Cardo alterius — 
valvule dentibus duobus. latis lamellatis dive yerg entibus, : "alterius nullis. 
Found in Salcombe Bay, Devon ‘(burrowed in old 
- oyster-shells) by Mr. Montagu. 
14. 
suborbi- M. testa ENERE valvulz alterius dente primario 
cularis. — solitario, alterius du ear dentibus. lateralibus la- 
T: SABEN Loi rr 
il -Montagu. Test. Brit. p. 39. E I 
Habitat in mari, rupes calcareas excavans. - pen 1 Tethys: 
Testa -4 polis longa vel paulo major, 4. poll. lata, J facie dime, sub epi- 
S SEN , Sermide brunnea; edd | | » veubstriata, intus 
PA T p = De dat alis ; eq. tra. 
VOL. VUL. ; n 
"X 
