SIGARETUS. 



Plate IV. 



Species 17. (Fig. n, h, llus. Cuming.) 



SiGARETus C0ARCT.\TUS. S'lg. testd HmbiUcatd, depresiP 

 ovatd, albidn, epidermide fidvd iitdutd, spird parvd, 

 atifract'ibus snpfrni declivi-conrctalh, versus basin tii- 

 midiasculis, spiral iter /itieari-incisis. 



The pressed Sig.^retus. Shell iimhilicntcd, depressly 

 ovate, whitish, covered with a fulvous epidermis, 

 spire small, whorls slopiun-ly contracted round the 

 upper ]wrt, rather swollen towards the base, spirally 

 linearly incised. 



Hub. Singapore. 



X rather flattened species, the whorls being slopingly 

 contracted round the upper part, rather swollen towards 

 the base. 



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



SiG.\RETUS TUMESCENS. Siff. testd umbiUcatd, subobloiigo- 

 ovatd, temdenld, ventricosd , albidd, epidermide temii 

 fiihn, spird parviiisciild, aiifraclibus conve.ro-lnrnidis, 

 ■ sjyiraliler iineari-ii/cisis. 



1'he swelling Sigaretus. Shell undjilicated, some- 

 what oblong-ovate, rather tliin, ventricose, whitish, 

 with a light fulvous epidermis, spire rather small, 

 wdiorls convcxly swollen, spirally linearly incised. 



Ilab. ? 



Of a more oblong form than the preceding species, 

 liarht and ventricose. 



Species 19. (Fig. n, b, Mus. Cuming.) 



Sigaretus papilla. Sir/, testd modi.ci' umbiUcatd, oh- 

 longo-ovatd, subaiiriformi, albidd, epidermide fulvd 

 partim iiidutd, spird brevi, siibexserld, anfractihns 

 declivl-coiwexis, spiraliter lirieari-inei-sis, coticentriai' 

 suhrndi^ plicatis. 



The nipple Sigaretus. Shell moderately umbilieated, 

 oblong-ovate, somewhat ear-shaped, whitish, partially 

 covered with a fulvous epidermis, spire short, rather 



exserted, whorls slo)5ingly convex, spirally linearly 



incised, concentrically rather rudely plicated. 

 Nerita papilla, Chemnitz, Conch. Cab. vol. v. p. 385. 



pi. 189. f. 1939. 



Sigaretus papilla. Gray. 



Naticina papilla, Recluz. 

 Hab. Island of Negros, Philippines (on the sands at low 



water), Cuming. 



The spire acquires a nipple-like appearance from being 

 rather exserted, so as to leave a deep suture round it. 



Species 20. (Fig. a, b, ^lus. Cuming.) 

 Sigaretus nitidus. Siij. testa nmbiUcatd, semiglobosd, 



albidd, epidermide fulvd iuduld, spird brevi, snbpro- 



niinuld, atifractibus declivi-eonvexis, lumidiuscnlis, 



spiraliter liiieari-iiicisis. 

 The neat Sigaretus. Shell umbilieated, semigloliose, 



whitLsh, covered with a fulvous epidermis, spire short, 



rather prominent, whorls slopingly convex, rather 



swollen, spirally linearly incised. 

 Hub. Island of Ticao, Philippines (on the reefs at low 



water) ; Cuming. 



A very neat and characteristic species, approaching 

 S. coarctalus. 



Species 31. (Fig. a, b, Mus. Cuming.) 



Sigaretus oblongus. Siij. testa profniide umbiUcatd, 

 oblongo-ovald, fulvesceiite, spird brevi, subaciimiuafd, 

 aufracfibus declivibus, deinde convexo-tumidis, coucen- 

 trice deuse flo-striatis. 



The oblong Sigaretus. Shell deeply umbilieated, ob- 

 long-ovate, fulvous, spire short, rather acuminated, 

 whorls sloping, then convexly swollen, concentrically 

 closely thread-striated. 



Hah. y 



The sculpture of this species is quite distinct from that 

 of the preceding. Instead of incised linear grooves, it con- 

 sists of numerous. raised threads. 



September, 18G4. 



