474 Mr. F.-P. Marrat on i^oposed neiv. Species o/Oliva. 



jne, all agreeing in form and marking with my shells ; so that 

 I am more convinced that this is a good form, 



0. polita^ Man-at, is made a variety of 0. jaspidea of some- 

 body not quoted. My shell has no affinity with the 0. jaspi- 

 deay Gmelin, but somewhat resembles the 0. jaspidea ^'Dw^.o^, 

 which is the same as 0. Duchsii, Reeve. 



0. pijMrata, Marrat. Here Mr. Ponton remarks that 0. 

 conoidalis, Lam., is simply a variety of 0. jaspidea, not men- 

 tioning whether it be the 0. jaspidea, Duclos, or O.jasjndea, 

 Gmelin. If the former, there is no relation ; if the latter, the 

 names are synonymous. 



O.faba, Marrat, is placed as a variety of 0. carneola. Lam. 

 [0. aurora, Soland.). According to a recent monograph by 

 Dr. Gray, my shell belongs to the genus 8trepJiona, having 

 the spire open to the tip, and 0. carneola, Lam., to the genus 

 Galeola, embracing shells with a callous spire. I may remark 

 that after three years' search for any open-spired shell in this 

 group — viz. 0. calosoma, Duclos (a beautiful species), 0. ti- 

 grina, Meusch. [0. tessellata. Lam.), 0. todosina, Duclos, 0. 

 lepida, Duclos, 0. volvarioides, Duclos, 0. athenia, Duclos 

 (not figured by Reeve, but quoted as a variety of 0. carneola, 

 Lam.), and 0. picta, Reeve — I have failed in my attempt. 

 In a drawer on my table one hundred specimens are arranged, 

 consisting of all the figured varieties in the series, and several 

 others neither figured nor described. 



0. hlanda, Marrat. Mr. Ponton considers this to be a form 

 of (9. ispidula of somebody. If he mean the shell of Linn., 

 I must inform him that the white shell of which he speaks is 

 the 0. Candida, Lam. {0. olerinella, Duclos), and was sepa- 

 rated by both these able conchologists, in consequence of the 

 broad plaited columella. 



0. oblonqa, Marrat. Will Mr. Ponton kindly refer to the 

 figures mentioned in my description ? 



0. cylindrica, Marrat. Again a species with an open spire 

 and rounded spiral whorls has been referred to the figure of a 

 shell with a callous spire, but in this case with good reason. 

 My description certainly favours the idea ; but let me refer to 

 the group in my cabinet. I find seventy-three specimens under 

 the head of 0. irisans. Lam., including all the varieties figured 

 in any work to which I have access, and many more beautiful 

 than their more favoured paper brethren ; but the eighteen 

 shells under the head of 0. cylindrica, Marrat, will not agree 

 with any of them. 



0. ornata, Marrat, has been imported in considerable num- 

 bers, and is an acknowledged species by every conchologist 

 who has seen it. 



