FISSURELLA 



Species 9'J. (JIus. C'luniug.) 



FissL'RELLA PiLEOPSOiDES. Fiss. testd ovatd, mlde 

 elevatd, antici conspicue falcald, radiatim detisiUratd, 

 orijicio ollongo-ovato, parviuscitlo ; alhd. 



The Pileopsis-like Fissurella. Shell ovate, very 

 much raised, anteriorly conspicuously hooked, ra- 

 diately thickly ridged, orifice oblong-ovatc, rather 

 small; white. 



Hab. Island of Masbate, Philippines (on the reefs at low- 

 water) ; Cuming. 

 Remarkable for the top of the shell being very much 



produced anteriorly, after the manner of a FilMpds. 



Species 100. (Fig. 100,101, Mus. Cuming.j 



FissuRELLA SiXGAPORENSis. Yns. testd ovatd, sabconicd, 

 costeUis nnmerosis radiantihus siriis coucentncis eleva- 

 tiusculis densklathraid, orificio parw, suborbiciilarl ; 

 albidd, cinereo-nigricante siibobscure radiatd et va- 

 ringatd. 



The Singapore Fissurella. Shell ovate, subconical, 

 thickly latticed with numerous radiating fine ribs 

 and raised concentric striae, orifice small, nearly or- 

 bicular ; whitish, somewhat obscurely rayed and va- 

 riegated with light ash-black. 



Eab. Singapore; Cuming. 



The latticed sculpture of this species becomes frequently 



araakamated and obscure towards the base. 



Species 102. (Mus. Cuming.) 



Fissurella Sieboldii. ¥m. testd ovatd, medio elevatd, 

 antice cwrvatd, radiatim costatd, costis subcompressis, 

 distantibus, posticis majoribus, ekvati-s, concentrice ru- 

 goso-squamatis, orijicio parvo, ovato, antico ; albidd, 

 cinereo variegatd. 



Siebold's Fissurella. Shell ovate, raised in the 

 middle, curved anteriorly, radiately ribbed, ribs 

 rather compressed, distant, the posterior larger, 

 elevated, concentrically roughly squamate, orifice 

 small, ovate, anterior ; wliitish, variegated with ash. 



Hab. Japan; Dr. Siebold. 



Belonging to a very characteristic group, including 



F. cuhjculata and others, in which the radiating ribs are 



August 



widely separated, more or less squamate, and always 

 larger at the posterior end of the shell. 



Species 103. (Mus. Cimiing.) 

 Fissurella muricata. Fiss. testd ovatd, medio coiiicd, 

 lateribus depressiuscidd, radiatim subobscure tenuiliratd 

 et striatd, liris nmricato-nodosis, orificio obloiujo, late- 

 ribus medio excavutis ; tiigricante-jmrpKred, albidd 

 circa orificinm. 

 The prickly Fissurella. Shell ovate, conical in the 

 middle, rather depressed at the sides, radiately some- 

 what obscm-ely ridged and striated, ridges prickly- 

 nodose, orifice oblong, sides excavated in the middle ; 

 blaekish-pm-ple, whitish round the orifice. 

 Uah. ? 



Distinguished chiefly by the prickly-nodose ehara 

 the ridges. 



of 



Species 104. (Mus. Cuming.) 



Fissurella fimbriata. Fiss. testd ovatd, medio elevato- 

 conicd, radiatim costatd, costis angustis, compressis, 

 laminis conceutricis pulcherrime sqiiamato-fimbriatd, 

 orificio ovato, cent rati ; griseo-albd, iiigricante-cinereo 

 hie illic variegatd. 



The furbelotved Fissurella. Shell ovate, elevately 

 conical in the middle, radiately ribbed, ribs narrow, 

 compressed, very beautifidly squamately furbelowed 

 with concentric laminse, orifice ovate, central ; grey- 

 ish-white, variegated here and there with blaekish- 

 ash. 



Hab. Port Molle, North-east Coast of Australia (under 

 stones at low water) ; Jukes. 

 In tliis most elaborately fm-belowed species the orifice 



has a very central aspect and is pecnliai-ly elevated. 



Species 10.5. (Mus. Cuming.) 



Fissurella viminea. Fiss. testd oblongo-ovatd,depresso- 

 pland, medio elevatinsculd, obtusd, radiatim costatd, 

 costis parvis, confertis, irregularibus, liris conceutricis 

 undique creberrime decnssatis, orificio oblotigo, parvius- 

 culo ; cinereo-oUvaced, obscure radiatd, pellucido-alba 

 circa orificinm . 



1S50. 



