Ej^llsia, Cullustracuin, Mf.salia, itw .TGI 



Tt was tlioiiuflit, tlu'reforc, it nilglit be ust-fiil to biing 

 to<;etlu'r a li^t of the ik'scribcj spctios, <^iviii<^ ratlier nume- 

 rous r«'feiences, and to assign tlu-su various tonus to what 

 appears to be tiuir true generic position. 



It is nnfoitunute that the animals of /♦-j^rZ/.s/a and of the type 

 of Mesa/ia are unknown, and consequently it cannot be stated 

 with certainty whether their relationship is nearest to the 

 'J'uriittllithe or Epiloniitlaj. 



EgmSIA, Gray. 



1840. Eylisia, Gray, Synopsis CoutentM Ihit. Mas. 1840, p. 147 (name 



only). 

 1842. Ei/li.*ia, iil. op. cit. ed. 44, p. 01 (nsime only). 

 1847. Eijli-fla, id. Proc. Zool. Sue. 1847, p. loo. For Turbo stituralis 



(Gray). Wood. 

 1^4!). Eijtisia. Reeve, Conch. Icon. vol. v. 



18">4. Etili-sia, II. & A. .•\dnin.s, GontTii Ilec. Moll. vol. i. p. 354. 

 18o7. Eijlisia, Gray, CJuide .M.ll. Brit. Miis. p. 110. 

 18o!>. EijUsia, Cheiiu, Man. Cunchyl. vol. i. p. 318, as subjrenus of 



TurritjUa. 

 18.52. Eylfsia (.<iic), Sowerby, Conch. Man. p. 140. 

 1878. Eylisia, Kobclt, llliist. Conchyl. p. 138. 

 1883. Ef/li'<ia, Tryon, Struct. Syst. C'oncL. vol. ii. p. 224. 

 188.5. Eylisia, Fischer, Mun. Conch, p. 778. 

 1887. Eylisia, Tryou, Man. Conch, vol. ix. p. 61. 



The first description * o£ this genus is that given by Reeve, 

 but its institution should date from 1847, in wliicli year Gray 

 associated with it the Turbo suturalis oiWooiX^ but unaccom- 

 panied by any description. Nothing is known of the animal, 

 or hitheito of the operculum, and consequently its systematic 

 position could not be determined. It lias been placed in the 

 Turritellidte by H. and A. Adams, Gray (18.57), Chenu, 

 S. Woodward, Kieiier, Kobclt, Duiiker, Pactel, Boog 

 ^^'atsoll. 



Tryon and Fischer located it in the Epitoniidte ( = Scala- 

 riidse). 



In describii'g Eglisia cnmiiujii {=■ tricar innta, Ad. & Rvc.) 

 A. Aflains remarked : — " The obscure longitudinal v.irices 

 show tb'' true position of this genus to l)c between Tarri- 

 tella and Sad iria.^^ Similar " obscure longitudinal varices " 

 occur in E. sj>iral(i, the type of the geiius^ an<l iaxceohtta, 

 live., but they are merely the remains of former outer lips, 

 niaiking periods of arrested growth, and not, as in «ScVf/a»-m, 

 seiving as ribs for the strengthening of the shell. Marks of 

 an estcd growth may be observed in some of the Turritellas, 



• The few words given by Gray in the ' Synopsis Contents Brit. Mus. 

 ed. 44, p. (51, do not constitute a doscriplidii, since no species is quoted. 



