102 DKNTALIUM. 



fulvo-fasciata, leviter arcuata, costis numcrosissimis rotundis 

 prope apicem iuaequalibus deinde sequalibus, striis elevatis con- 

 centricis cancellata ; fissura elongata. — Our representation is taken 

 from a magnificent specimen in the collection of R. M'Andrew, 

 Esq.; it is minutely cancellated by raised striae crossing the ribs. 



34. D. formosum, Ad. 8f Reeve, f. 2. — Testa arcuata,, acumi- 

 nata, vcntricosa, coloribus viridi, rubro et fulvo alternatim fasciata, 

 15-costata; costis validis, rotundis, aequalibus; fissura mediocri. — 

 This beautiful species is fluted with 15 regular rounded ribs, and 

 banded across with alternate ribbons of red, green, and buff. 



35. D. BiSEXANGULATUH, Soirb. Th., f. 8. — Testa alba, magna, 

 solida, mediocriter arcuata ; costis duodecim, validis ; interstitiis 

 latis laevigatis; apice nonnunquam fissurato. — A white, 12-ribbed 

 species. Some specimens show a slight notch. 



36. D. elephantinum, Linn., f. 4. — Testa magna, arcuata, so- 

 lida, viridi, fasciata, versus apicem albescente; costis decern, 

 validis ; interstitiis latis, striatis ; fissura brevi. — This large, green- 

 banded shell is the true I), elephantinum, as shown by Mr. Hanley 

 in his shells of Linnaeus. 



37. D. aprinum, Linn., f. 5, 6. — Testa valide arcuata, viridi, 

 fasciata, angusta ; costis decern ; interstitiis lasvigatis ; apice vix 

 fissurato. — About half the width of I), elepliantinum, with 10 ribs, 

 and the interstices plain. 



38. D. interstriatum, Sowb. Th., f. 7. — Testa valide arcuata, 

 viridi, angusta ; costis principalibus circiter decern, interstitialibus 

 minoribus ; apice integro. — Resembling D. aprinum, but with nu- 

 merous interstitial striae. 



39. D. Javanum, Sowb. Th., f. 12.— Testa valide arcuata, 

 pallide fulva seu subviridi ; costis octo, angulatis ; interstitiis latis, 

 planulatis ; fissura apicali parva. — Differing from B. aprinum, in 

 having eight instead of ten ribs, with broad flat surfaces between. 



40. D. novem-costatum, Desk., f. 24, 25, 26, 27, 38.— Testa 

 solida, plerumque rubra, fasciata ; costis novem, solidis, rotundis, 

 versus marginem evamdis ; apice integro. — In colouring, this 

 species resembles D. dentalis, being generally of a reddish tint, 

 with darker bands. The light-tinted or nearly white variety is 

 small. 



41. D. OCTOGONUM, Lamlc, f. 9. — Testa alba, leviter arcuata, 

 solida; costis octo, validis, rotundis; interstitiis latis, longitudi- 

 naliter striatis ; apice vix fissurato. — This well-known white shell 

 has eight ribs, with interstitial strias. 



