﻿E T E L L A. 



Plate IV. 



Species 13. (Mus. Brit.) 



ROTELLA S'lHIoLATA. But. tcntd cillHamOJieit, fu^CO 



varieijiili'i, xju'rolifrr xtriata, supra infraqxic suh- 

 cequaliU'i- Ciiiii'trd ; rallo ventrali augusto, trilo- 

 biito. 



Tm: STi;iATKi> Iiotei.la. Sliell cinnamon variegated 

 with brown, spirallj striated, nearly equally 

 convex above and below ; ventral callus narrow, 

 trilobate. 



A. Adams. {Etlialia), Pro. Zool. Soc. 1S53. 



m,h. ? 



The callus is in three parts, one rounded above, 

 one spread circularly over the umbilicus, and the 

 third forminEf a thickened marijin to the columella. 



Species 14. (Mus. Brit.) 

 RoTELLA CAN'iiiDA. 7i.)/. fes/(t parvd, suhglohosd, lavi, 



alia, (ipii,;! : raUn reii trail parvd, rotmuld ; col- 



umelln hituixcAild ; iijicrttird magnd. 

 The white Rotella. Shell small, rather globose, 



smooth, white, opaque; ventral callus small, 



round ; columella rather broad ; aperture large. 

 A. Adams. (Ethalia), Proc. Zool. Soc. 1862, p. 296. 

 Hab. Gotto Islands, Japan. 



This minute species is less like a RotcUa than other 

 species of E thai la. 



Species 1-5. (Mus. Brit.) 

 Rotella PEKsricuA. Kut. testa minutd, alhd, com- 



prcssd, Iciiticidarl; aperturd, transversu ovatd ; 



callo ventrali semiluvari. 

 The PEESPicnoas Rotella. Shell minute, white, 



compressed, lenticular ; aperture transversely 



ovate ; ventral callus semilunar. 

 A. Adams. (Ethalla), Annals of Natural History, 



1861. 

 Hab. China. 



Very simple in form and character. 



Species 16. (Mus. Brit.) 



Rotella Bkazieki. L'ot. tcstd transverse ovatd, de- 

 pressd, minutd,, alba, semipcllacidd. ; callu ventrali 

 parvo, rotundo, ad columellam continuo ; aperturd 

 magnd. 



Brazier's Rotella. Shell transversely ovate, de- 

 pressed, minute, white, semipellucid ; ventral 

 callus small, rounded, ctmtinued at the columella; 

 aperture large. 



Angus. {Ethalia), Proc. Zool. Soc. 1877, p. 3'J, PI. .5, 

 f. 17. 



Uah. Sow and Pigs Reef, Port Jackson, Australia. 



Species 17. (Mus. Brit.) 

 Rotella polita. Hot. testa sabghbosd, alhd, poUtd ; 



spird conicd, anfractibiis panels ; callo ventrali 



fere ohsoletd. 

 TuE I'OLisHED Rotella. Shell subglobose, white, 



polished ; spire conical, whorls few ; ventral 



callus almost obsolete. 

 A. Adams. (Ethalia), Annals of Nat. Hist. 1862, 



p. 2!)6. 

 Uah. Gotto, Japan. 



Species 18. (Fig. a, b, Mus. Brit.) 

 Rotella guamexsis. Bot. testd altiiiseuld, suhglohosd ; 

 i-anr ptrt,!, hri-iijii'd : anfractibiis swperne versHs 

 suliiniDi finmJis : migido centrali rotiwdo, infra 

 couvr.i-ix, rallo rciiifiirm-i, rosea; colmnelld late 

 callosd. 

 The GaA.M Rotella. Shell rather high, subglobose ; 

 variously painted, smooth ; whorls above towards 

 the suture tumid ; central angle rounded, convex 

 below, callus kidney-shaped, pinky; columella 

 broadly callous. 

 QuoT. Voy. Astrolabe, PI. 61, f 32-33. 

 llab. Isl. Guam. — Luxon ; Philippines. 



Thisisthe type of the genus jEi/iaZ/d, which, however 

 little like Rotella in general form, has the same essen- 

 tial characters. 



