DELPHINULA. 



Plate IV. 



(Figures moderately magnified.) 



Species 15. (Fig. a and b, Mus. Cuming.) 

 slphintjla discoidea. Delph. testa discorded ; spird 

 plano-depressd, liris longitudinalibus et transversis, 

 interstitiis subtiliter striatis, eximie clathratd; peri- 

 pherid carinis duabus clathratis prominentibus ornatd. 

 he discoid Delphinula. Shell discoid ; spire flatly 

 depressed, delicately latticed with transverse and 

 longitudinal ridges, the interstices between which 

 are finely striated ; periphery ornamented with two 

 prominent latticed keels. 

 eeve, Pro. Zool. Soc, 1843. 



r ab. Cagayan, Island of Mindanao, Philippines (found in 

 coarse sand at the depth of ten fathoms) ; Cuming. 

 The latticed sculpture of this shell very much resem- 

 les the character of a figure in plate 31 of the ' Maga- 

 b de Zoologie' for 1834, under the appellation of D. 

 damantina, Duclos. It differs however essentially from 

 aat species in form, and I regret to say that the Delphi- 

 ula adamantina, according to the figure alluded to, is 

 uite unknown to me. 



Species 16. (Fig. a and b, Mus. Cuming.) 

 )ELrHiNULA evoluta. Delph. testa spiraliter discoidea, 



partim evolutd ; anfractibus subguadratis, marginibus 



corrugato-crenat is . 

 rnE unrolled Delphinula. Shell spirally discoid, 



partially unrolled ; whorls somewhat square, cre- 



nated in a wrinkled manner at the edges. 

 Reeve, Pro. Zool. Soc, 1843. 

 Hab. Island of Corrigidor, 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 appearance of a miniature hunter's horn, is not 

 a casual deformity. Several specimens were collected 

 by Mr. Cuming at the above-mentioned island. 



Species 17. (Fig. a and b, Mus. Belcher.) 

 Delphinula Reeviana. Delph. testa orbiculari, sub- 

 discoided, miiticd ; spird depressiusculd, anfractibus 

 convexis, longitudinaliter carinulatis, curimdis nume- 



rosis, superis distantioribus ; interstitiis liris obhquts 

 corrugato-clathralis ; labro simplici ; nmbilico per- 

 amplo. 

 Reeve's Delphinula. Shell orbicular, somewhat dis- 

 coid, spineless; spire rather depressed, longitudinally 

 keeled, keels numerous, upper ones the more distant 

 from each other ; interstices latticed in a wrinkled 

 manner with oblique ridges ; lip simple ; umbilicus 

 very large. 

 Hinds, Pro. Zool. Soc, 1843. 



Hab. Straits of Malacca (found at the depth of seventeen 

 fathoms) ; Hinds. 

 The external sculpture of this shell, which approximates 

 in general form to the Delphinula nivea, exhibits a kind 

 of crimped appearance. 



I kindly thank Mr. Hinds for attaching my name to 

 this highly interesting species, and especially as belong- 

 ing to a genus which I have worked out with consider- 

 able interest and attention. 



Species 18. (Fig. a, b &. c, Mus. Cuming.) 



Delphinula muricata. Delph. testa turbinatd, pallid'e 

 auranlio-fulvd, maculis coccineis vivide aspersd ; an- 

 fractibus carinis tribus, prominentibus, muricato- 

 squamulosis, cinctd, supra et infra subtiliter corrugato- 

 striatis; suturis pecu/iariter profundis. 



The prickly-keeled Delphinula. Shell turbinated, 

 pale orange-yellow, vividly sprinkled with scarlet 

 spots; whorls encircled round the middle with 

 three prickly-scaled keels, and sculptured above and 

 below with faint wrinkled stria; ; sutures peculiarly 

 deep. 



Reeve, Pro. Zool. Soc, 1843. 



Hab. East Indies; Humphrey, MSS. 



This is by no means a newly discovered species ; the 

 specimens here figured having been found in the old col- 

 lection of the late Mr. George Humphreys, with the 

 name and locality above used attached to them in his 

 hand-writing. 



October 1843. 



