the Boat and Melon Volutes. 273 



designates a. angulata and /3. incurva. In one, the shoulder or 

 upper edge of the whorls is angular, inclining outwardly ; in 

 the other it is inflected inwardly. 



8. Cymbium [Yetus] Olla, Linnaeus, Syst. Nat. p. 1196; Conch. 

 Icon. pi. 25. f. 17 a, and pi. 26. f. 17 b, c. 



Valuta Olla, Linnaeus. 

 Cymbium mamillare, Klein. 



Philippinum, Martini. 



Valuta papillaris, Gmelin. 

 Cymbium papillatum, Schumacher. 



Olla, Menke. 



Cymba Olla, Broderip. 

 Y};tus Olla, Gray. 

 Cymbium iiroductum, Lowe. 



Hab. Mediterranean. 



It will be seen by the foregoing synonymy, that authors have 

 not always agreed, either upon the natural habitat of this species, 

 or upon the question of its identity with the Voluta Olla of 

 Linnseus ; but this want of agreement is the result of error rather 

 than of a difference of opinion. Martini named the shell as 

 coming from the Philippine Islands, and Lamarck gives the 

 Indian Ocean as its native locality ; but it is now well known 

 that C. Olla is a Lusitanian shell, belonging strictly to the 

 Western Mediterranean, on the shores of Spain. There is no 

 evidence of its having been collected within the tropics. 



The error of dissociating this shell from the Linnsean Voluta 

 Olla needs also to be removed. In a recent paper by the Rev. R. 

 T.Lowe on the shells of Mogador (Proc. Linn. Soc. 1860, p. 191), 

 the author, relying upon an opinion of Mr. Hanley (Ips. Linn. 

 Conch, p. 237) that this is not the Voluta Olla of the ' Systema 

 Naturse,^ has given it the new name of Cymbium productum. 

 Mr. Hanley says, " Assuredly the Cijmba Olla of authors cannot 

 be termed the Voluta Olla of Linnseus." Having carefully ex- 

 amined the evidences on both sides, I am able to state that the 

 only evidence of any value against this species being the Linnsean 

 V. Olla is, that the columella is two-plaited, whereas it is described 

 in the ' Systema' as being four-plaited. The evidence in favour of 

 its being the Voluta Olla is as follows : — All the best figures 

 referred to in the Linnsean synonymy, namely those of Klein, 

 Listei', Argenville, Adanson, and Gualtieri, represent unques- 

 tionably the species under consideration. The figure of Gualtieri 

 is a particularly characteristic one ; and in Linnseus's own copy 

 of that work, in the library of the Linnsean Society, the name 

 Voluta Olla is written against that figure, in Linnseus's hand- 

 writing. In some specimens of C Olla there is a rudiment of a 

 third columellar plait, and there is also a winding ridge of enamel 



