268 MR. E. A. SMITH ON THE [Apr. 1, 



colour, however, the columella and the denticles within the outer lip 

 exactly resemble T. olearmm. T. aquatilis (Ree%'e, Conch. Icon. 

 fig. 24) has a great affinity with T. pilearis (Reeve, I.e. fig. 23), 

 and both have an equally wide range. Both occur at the Philip- 

 pine Is., Japan, the Red Sea, and the West Indies ; and the general 

 structure of the two forms is so very similar, that I am inclined to 

 think that eventually, when large series can be re-examined, it will 

 be impossible to distinguish them. The shell in the d'Orbigny col- 

 lection marked " T. martinianum, d'Orb."\ is quite a typical 

 aquatilis, and his three examples of T. americanum ^ from Rio 

 Janeiro, which he formerly considered T. pilearis ^, certainly belong 

 to T. olearium. 



The largest specimen from St. Helena, which is much broken, 

 when perfect must have measured about four and a half inches in 

 length. 



Triton turtoni. (Plate XXI. figs. 13, 13 a.) 



Testa elongata, fusiformis, turrita, ru/escens, varicibus albidis, 

 rufo-zonatis, instruct a ; anfr. \\, embryonales & pallidefusci, 

 convexi, ceeteri superne tabulati, angulati, inferne ad suturam 

 valde constricti, liris spiralibus, costis longitudinalibus, nodosis, 

 rotundatis, varicibusque paucis instructi ; costce ad angulum 

 prominentes {in anfract. penultimo 7), in ultimo infra medium 

 obsoletcs ; lircB transversce, incequales ; apertura longe intus 

 lurida, cum canali longit. totius ^ cequans ; labrum intus album, 

 liris circiter ti instructum, ad marginem paribus senis denti- 

 culorum partim fusco-tinctorum armaium ; columella in medio 

 arcuata, plus minus purpureo-nigra, rugis transversis, graci- 

 libus, albis ornata ; canalis intus albus, recurvus. 

 Longit. 49 millim., lat. 20. 



This is a very distinct species, and well characterized bv the 

 angled tabulated whorls which are much constricted at the lower 

 suture. On the five notmal whorls there are only four varices, two 

 on the body-whorl and two on the penultimate. Of the spiral 

 ridges, one marking the angle and one below it, and which are 

 nodose upon the costse, are most conspicuous, 



Ranella cjelata, Broderip. 



This species is common on the coast of Panama, and it is 

 extremely remarkable that it should occur at St. Helena. The 

 single Sfiecimen collected by Mr. Melliss*, and presented to the 

 British Museum, corresponds in every particular with Panama 

 examples ; but those obtained by Capt. Turton partly belong to the 

 same variety, and partly to that named R. j^ustulosa by Reeve, from 

 Ascension Island, which differs from the Panama type in having 

 fewer and larger tubercles. A specimen collected by Staff-Surgeon 



' Sagra's Hist. Cuba, Mollusques, vol. ii. p. 162. 



■^ Vov. dans rAmer. Mericl., Moll. p. 711. 



=* Jhfd. p. 449. 



' Vide Jeffreys, Ann. Mag. Nat. Hist. 1872, vol. ix. p. 264. 



