Descriptive Catalogue of -the British Testacea. 67 
tis, tuberculis obtusioribus et di&tantioribus quam in testa juniore 
C. echinati. (Montagu.) 
Discovered at Falmouth, in Cornwall, by Mr. Mon- 
tagu. 
19. : 
arcuatum. C. testa orbiculari, transverse arcuatim striata. Montagu 
Test. Brit. p. 85. t. 3. f. 2. 
Habitat in mari. 
Testa Telling divaricate affinis, diametro vix 4 poll. tenuis, fragilis, semi- 
pellucida, alba, sed non glabra, subtilissimé striata, rugis nonnullis 
concentricis. Umbones centrales, acuti. 
For the discovery of this elegant species we are in-. 
debted to Mr. Montagu ; he describes it : as rare in Fal- 
mouth Harbour. ' 
13. | 
discors, C. testa suborbiculari, maxime coUo. valvulis oblique 
Sstriatis.. Montagu Test. Brit. P 84. 
Linn. Gmel. p. 3241?- "T pisiformis. 
Halitat in mari. 
Testa magnitudine pisi, glabra, alba, striis obliquis (vix oculo nudo dis- 
cernendis), in angulum acutum decurrentibus. Cardo dente primario - 
in valvula alterutra ; D: lateralibus. Jamellatis. remotis. (Mog: 
tagu.) 5 
 Thisisa doubtful species hetoi to Mr. r Montag; | 
who observes that he found only one dead pecine, at 
| : pe, in Cornwall. 
14. SR P 
elonga- €. tonius angi ioni tis 21 rotun- 
tum. datis, evite ru s. ontagu Pur Brit, 5 Bg. 
Habitat i in mari. | ADM 
Testa diametro 4 poll. daveueige-alba vel rufescens, . ~~ ong s e. 
angulata. Umbo non centralis. (Montagu.) - 
da AERA by dredging in Salcombe Pay, Deve 'on. * | 
- 
E2 EM 15. muri- 
