516 Zoological Society, 



however, essentially from that species in form, and I regret to say 

 the D. adamantina, according to the figure alluded to, is quite un- 

 known to me, though elaborately described by Deshayes in the ninth 

 volume of his edition of Lamarck's * Animaux sans vert^bres.* 



5. Delphinula evoluta. Delph. testd spiraliter discoided, partim 

 evolutd ; anfractibus subquadratis , marginibus corrugato-crenatis. 



Conch. Icon. Delphinula, pi. 4. fig. 16, « and b. 



Hah. Island of Corregidor, Bay of Manila (found in coarse sand at 

 the depth of seven fathoms) ; Cuming. 



The loose manner in which this shell is rolled, giving it the ap- 

 pearance of a miniature hunter's-horn, is not a casual deformity. 

 Several specimens were collected by Mr. Cuming at the above- 

 mentioned island. 



6. Delphinula muricata. Delph. testd turbinatd, pallide aurantio- 

 fulvd, maculis coccineis vivide aspersd ; anfractibus carinis tribus 

 prominentibus muricato-squamulosis cinctd, supra et infra subtiliter 

 corrugato-striatis ; suturis peculiariter profundis. 



Conch. Icon. Delphinula, pi. 4. fig. IS, a, b and c. 



Hab. East Indies ; Humphreys MSS. 



This is by no means a newly- discovered species, the specimens 

 here figured having been found in the old collection of the late Mr. 

 George Humphreys, with the name and locality above used attached 

 to them in his hand- writing. 



7. Delphinula CLATHRATA. Delph. testd subdiscoided, anfractibus 

 rotundatis, carinulis transversis et longitudinalibus (cquidistantibus 

 regulariter clathratis ; labro incrassato, marginato ; umbilico per- 

 amplo. 



Conch. Icon. Delphinula, pi. 5. fig. 21, « and b. 

 Hab. Island of Corrigidor, Bay of Manila (found in coarse sand at 

 the depth of seven fathoms) ; Cuming. 



A small species, with a regular latticed surface. 



8. Delphinula Cobijensis. Delph. testd turbinatd, minutd; an^ 

 fractibus convexis, carinulis transversis et longitudinalibus, cequi- 



distantibus regulariter clathratis ; umbilico mediocri ; labro sim- 

 plici. 

 Conch. Icon. Delphinula, pi. 5. fig. 22, a and b. 

 Hab. Port of Cobija, Peru (found under stones in rocky places at 

 low water) ; Cuming. 



The sculpture of this shell, familiarly known to Mr. Cuming as his 

 " little Cobija species," is exactly similar to that of the D. clathrata ; 

 it is however much less discoid in form, the whorls are not so round, 

 the umbilicus is smaller, and the lip is not marginated. 



9. Delphinula syderea. Delph. testd turbinatd, spird plano- 

 concavd, apice interdum rosacea, anfractibus angulato-convexis, 

 tuherculis muricatis, in seriebus duabus aut pluribus radiatim stel- 

 latis ; labro incrassato, marginato. 



Conch. Icon. Delphinula, pi. 5. fig. 23, a and b. 



