3G8 



^Ir. E. A. Smith on (lie Genera 



I 



1878. Aftsalia brcrialis : Kobelt, Illust. Conchyl. p. 138, pi. xlix. fig. 3, 

 1887. Mrsii/ia l/itvialis : Trvou, Alim. Conch, vol. viii. p. L'O!), pi. Ixv. 



fiors. L>8-1>1). 

 1897. Mtsulia brecialis: Kobelt, Concli. Cub., Turritella, p. 71, pi. x.\i. 



tigs. 1-3. 



Hub. Goree, Senegal, Sierra Leone. 



Var. van'a. 



1843. Turritella varia, Kioner, Coq. Viv. p. 42, pi. ii. figs. 3, 3fl, 3 b. 

 1849. J/c,sfl//(/ brcn'al/s (piirtiui): lleeve, Conch. Icon. vol. v. tig. 2 a. 

 1887. Mesalia brcvialis (partini) : Trjou, Man. Couch, vol. viii. pi. Ixv. 



tig. 27 (after Keeve), ti"-. oO (after Kiener). 

 1897. Mesalia variu : Kobelt, Couch. Cab., Turritella, p. 72, pi. xxi. 



tigs. 8-11. 

 1002. Mesalia varia, var. imbricata, Pallarv, Jouru. do Couch, vol. 1. 



p. U5. 



Hah. Mogador, Tangier, Algcciras. 



Xiw. freytayi. 



1884. Mesalia freiftnyi, Maltzan, Nachrichtsblatt deutsch. malak. 

 Gesell. 1884, p. U8. 



llah. Goiee, Seneorambia. 



AVIiether M. hrevialls should be divided in two or more 

 species seems somewhat doubttui, but, from the material 

 examined, I have been unable to tind a parting-line ot sepa- 

 ration between the typical very large form, which seems to 

 be restricted to the Senegambia region, and the smaller var. 

 varia, found at Mogador, Tangier, and South Spain *. Tiie 

 ditference in size is enormous, but tiie .sculpture, although 

 vaiiable in strength, is oi' the same character and tlie oral 

 features are similar. 



Tne typical form is well figured by Kiener (pi. xii. fig. 1), 

 and the upper portion of his figure answers exactly to La- 

 marck's description "anfractibus convexis, laivibus, prope 

 marginem superiorem uni.-iulcatis " and " elle est tort rac- 

 courcie, relativement k sa grosseur. Longueur, 2 pouces.'' 



Another large form is that figured by lleeve {Turritella, 

 pi. v. tig. IG h). It is narrower and distinguished by finer 

 i>piral3 than the type. The variety varia is also finely 

 lidged, but smaller ; however, intermediates in size occur. 

 M. freytagi has very convex whorls, most of which are 

 bicarinate and display more colour-markings. 



Turritella caribcea, d'Orbigny, said to be from Cuba, was 



* Hidalgo has expressed a similar opinion (Journ. de Conch. 1867, 

 vol. XV. p. ;J94). 



