Eglisia, Callostracum, Mesalia, i&c. 3G1 



It was tlioiisrlit, therefore, it miorlit be useful to biiiio: 

 togetlier a list of the described species, giving rather nume- 

 rous references, and to assign these various forms to Avhat 

 appears to be their true generic position. 



It is unfortunate that tlie animals of .£^^/.s7'a and of the type 

 of Mesalia are unknown, and consequently it cannot be stated 

 with certainty whether their relationsliip is nearest to the 

 'J'uriitellidre or Epitoniidse. 



Eglisia, Gray. 



1840, Eglisia, Gray, Synopsis Contents Brit. Mua. 1840, p. 147 (name 



only). 

 1842. Eglisia, id. op. cit. ed. 44, p. Gl (name only). 

 1847. Eglisia, id. Proc. Zool. Soc. 1847, p. 155. For Turbo suturalis 



(Gray), Wood. 

 1849. Eglisia, Reeve, Conch. Icon. vol. v. 



18o4. Eglisia, II. & A. Adams, Genera Rec. Moll. vol. i. p. 354. 

 1857. Eglisia, Gray, Guide Moll. Brit. Mas. p. 110. 

 1859. Eglisia, Chenu, Man. Conchyl. vol. i. p. 318, as subgenus of 



Turritella. 

 1852. Eglesia (sic), Sowerby, Conch. Man. p. 149. 

 1878. Eglisia, Kobelt, Illust. Coiicbyl. p. 138. 

 1883. Eglisia, Tryon, Struct. Syst. Concb. vol. ii. p. 224. 

 1885. Eglisia, Fischer, Man. Concb. p. 778. 

 1887. Eglisia, Tryon, Man. Conch, vol. ix. p. 51. 



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

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

 associated with it the Turbo suturalis oi^ood, but unaccom- 

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

 or hitherto of the operculum, and consequently its systematic 

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

 Turritellidne by H. and A. Adams, Gray (1857), Ohenu, 

 S. Woodward, Kiener, Kobelt, Dunker, Paetel, Boog 

 Watson. 



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

 riidse). 



In describing Eglisia cumingii { = tricarinata, Ad. & Rve.) 

 A. Adams remarked : — " The obscure longitudinal varices 

 show the true position of this genus to be between Turri- 

 tella and Scalaria.^^ Similar " obscure longitudinal varices " 

 occur in E. spirata, the type of the genus, and lanceolata, 

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

 maiking periods of arrested growth, and not, as in Scalaria^ 

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

 arrested growth may be observed in some of the Turritellas, 



* The few words given by Gray in tbe ' Synopsis Contents Brit. Mus. 

 ed. 44, p. 61, do not constitute a description, since no species is quoted. 



