DELPHINULA. 



Plate II. 



Species 6. (Fig. a & b, Mus. Cuming.) 



Ielphinula Tyria. Delph. testa subdiscoided, squamu- 

 losd, squamulis minutis, seriatim dispositis ; anfructi- 

 hvs superrik et infernc purpureis, supernr angulatis, 

 in feme rotundatis, umbilicum Icevem lacco-purpureum 

 plus minusve amplum formantibus ; spird depresso- 

 pland. 



'he Tyrian-furple Delphinula. Shell somewhat 

 discoid, scaly, scales very small, arranged in parallel 

 rows ; whorls above and below purple, upper part 

 angular, lower part rounded, forming a smooth 

 purple-lake umbilicus of greater or less extent ; spire 

 depressly flat. 



Leeve, Pro. Zool. Soc, 1842; Conch. Syst., vol. ii. 

 pi. 211. f. 1 & 6. 



/Ienke, Moll. Nov. Holl., p. 16. no. 61. 



lab. Rotten-nest Island, Swan River Settlement, New 

 Holland. 



Little need be added to assist the identification of this 

 leautiful shell ; it is the only large species of Delphinula 

 .t present known to be absolutely destitute of spines or 

 lodules, and the silvery-white scales, bordered round the 

 ipper and lower portion of the shell with rich purple, 

 ender it eminently characteristic. 



Species 7. (Mus. Cuming.) 



Delphinula distorta. Delph. testd subdiscoided, rubro- 

 purpured ; unfractibus angulatis, supra angulum ir- 

 regu/ariter squameo-liratis et corrugatis, infra squa- 

 mosis, squumis numerosis , contiguis, suberectis, muri- 

 catis, seriatim dispositis ; spird convexo-pland . 



1'he distorted Delphinula. Shell rather discoid, 

 deep reddish purple ; whorls angulated, irregularly 

 wrinkled with scale-like ridges above the angle 

 and covered with scales below it, scales numerous, 

 close, rather erect, prickly, and arranged in rows ; 

 spire convexly flat. 



Lamarck, Anim. sans vert., vol. vi. p. 231. 

 Turbo distortus, Linnaeus. 

 Delphinus distortus, Chemnitz. 



Hab. Island of Nicobar. 



The colour of this shell is a peculiar coral-red ; it has 

 no laciniated appendages, and there are no prickly scales 

 above the angle of the whorls ; the scales that crown 



the angle are often of larger size and more depressed 

 than any of the others. It may be as well to notice, 

 that the new specific title of rugosa, erroneously attached 

 by Kiener to his figure of this well-known species on 

 the plate, was abandoned on the subsequent publication 

 of the text. 



Species 8. (Mus. Cuming.) 



Delphinula nodosa. Delph. testd discoided, albd, coc- 

 eineo leviter tinctd, punctis elevatis, purpureis, in se- 

 riebus subdistantibus dispositis, cinctd ; anfractibus 

 rotundis, in medio nodosis, nodis minutis, supra et in- 

 fra nodosis, nodis grandibus ; spird concavo-depressd. 

 The knobbed Delphinula. Shell discoid, white, 

 faintly stained in places with pink, encircled with 

 rather distant rows of dark purple raised dots ; 

 whorls round, encircled with a row of small knobs 

 in the middle, and one of very large prominent 

 knobs above and below ; spire concavely depressed. 

 Delphinus nodosus, Chemnitz, Conch., vol. v. p. 160. 

 pi 174. f. 1723 and 1724. 

 Hab. Isle of Capul, Philippines (on the reefs at low 

 water) ; Cuming. 

 This very interesting shell is one of the many excel- 

 lent and rare species of Chemnitz that have been neg- 

 lected by Lamarck. Although four very distinct kinds 

 of Delphinulse are described and figured in -the ' Con- 

 chylien Cabinet,' only two were published in the ' Hist, 

 des Anim. sans vert.,' Lamarck's third species (D. tur- 

 binopsis) being a Cancellaria (C. trigonostoma, Sow.). 

 The shell before me is nearly as round and discoid as a 

 Planorbis, and may be recognised as a very characteris- 

 tic species. 



Species 9. (Fig. a and b, Mus. Cuming.) 



Delphinula laciniata. Delph. testd subdiscoided, 

 crassd, carneold, rubro et fusco variegatd ; anfraeti- 

 bus squamis minutis liratis, interdum lawioribus ; su- 

 perrie angulatis, angulo appendicibus grandibus curvis, 

 laciniato-ramosis ornato ; umbilico umplo, squamis 

 erectis muricatis armato ; aperturd infernl lacunatd ; 

 spird depresso-pland. 



The laciniatkd Delphinula. Shell nearly discoid, 

 thick, flesh-coloured, variegated wita red and 



June 1843. 



