PLEUKOTOMA.— Plate XXXIV. 



the upper part, transversely faintly ridged beneath, 

 aperture oblong, sinus deep ; whitish, somewhat indis- 

 tinctly stained with orange-brown. 



Keeve, Pro. Zool. Soc., 1846. 



Hab. Philippine Islands ; Cuming. 



The sinus which is formed between the two keels is unu- 

 sually deep. 



Species 312. (Mus Belcher.) 



Pleurotoma spurca. Pleur. testa ovatd, acuminata, au- 

 fractibus rotwndatis, costulatis, lineis duabus vet tribus 

 elevatis fuscis decussatis, minutissime transversim stria- 

 tic, labro juxta suturam incrassato, intus crenulato, sinu 

 amplo, lato. 



The dirty Pleurotoma. Shell ovate, acuminated, whorls 

 rounded, ribbed, decussated with two or three brown 

 lines, transversely very minutely striated, lip thickened 

 next the spire, crenulated within, sinus large, broad. 



Clavatida spurca. Hinds, Moll. Voy. Sulphur, p. 17. pi. 5. 

 f. 14. 



Hab. New Guinea and Straits of Malacca (in from five to 

 eighteen fathoms mud); Hinds. 



A stout shell partaking of the form of the P. argillacea. 



A richly painted shell disposed in close concentric plaits 

 crossed by fine ridges. 



Species 313. (Mus. Cmning.) 



Pleurotoma crebriplicata. Pleur. testa ovata, infer- 

 ne ventricoso-sinuatd, aufractibus concentrice crebripli- 

 catis, transversim crebriliratis, aperturd patuld ; albidd, 

 aurantio-fusco profuse varier/atd. 



The closely-plaited Pleurotoma. Shell ovate, ven- 

 tricosely sinuated, whorls concentrically closely plait- 

 ed, transversely closely ridged ; aperture wide open ; 

 white, profusely variegated with rich orange-brown 



Reeve, Pro. Zool. Soc., 1846. 



Hab. Bobnao, Island of Luzon, Philippines (found under 

 stones at low water) ; Cuming. 





Species 31j>. (Mus. nob.) 



Pleurotoma rosaria. Pleur. testa abbreviato-subulatd, 

 basi truncatd, aufractibus concentrice plicatis, Icevibus, 

 aperturd brevi, vivide coccineo-rosed, anfractuum parte 

 supremd albizonatd. 



The rose-stained Pleurotoma. Shell shortly subu- 

 late, truncated at the base, whorls concentrically 

 plaited, smooth, aperture short ; bright scarlet-rose, 

 uppermost part of the whorls white-zoned. 



Eeeve, Pro. Zool. Soc. 1846. 



Hab.— ? 



A debcately coloured species peculiarly distinct from 

 any other. 



Species 315. (Mus. Cuming.) 



Pleurotoma Dysoni. Pleur. testd ovata, spird sub- 

 turritd, aufractibus superne concavis et obtuse carinaiis, 

 infra rotundatis, longitudinaliter costatis, liris trans- 

 versis decussatis, aperturd brevi, sinu amplo ; castaneo- 

 fuscd, anfractuum parte stiperiori hie illic interrupte 

 albifasciatd. 



Dyson's Pleurotoma. Shell ovate, spire turreted, whorls 

 concave and obtusely keeled round the upper part, 

 rounded beneath, longitudinally ribbed, decussated 

 with transverse ridges, aperture short, sinus large ; 

 chesnut-brown, upper part of the whorls here and 

 there interruptedly white-banded. 



Eeeve, Pro. Zool. Soc., 1846. 



Hab. Honduras ; Dyson. 



I have much pleasure in naming this shell, at the re- 

 quest of Mr. Cuming, after Mr. Dyson, whose adventurous 

 researches after objects of natural history in a country not 

 the most healthy for European travellers are certainly 

 worthy of being recorded. 





