Manchester Memoirs, Vol. xlii. (1898), No. 4. 25 



A small, but well-marked species, for the sight of which 

 I am indebted to Mr. G. B. Sowerby. It belongs to the 

 toothless section of Nerita proper, and is really best dis- 

 tinguished from certain NeritmcB by its operculum. It is 

 variable in its painting : one of the examples before us is 

 neatly spirally threaded, the lirse being black, another is 

 more irregularly lirate, and tesselated, here and there only, 

 with black. The mouth is, as just observed, not denticulate, 

 nor has the outer lip teeth within the aperture. The opercu- 

 lum is paucispiral, granulated without. 



(avoSouc, without teeth.) 



Trochus (Infundibulum) Fultoni, sp. nov. 



(PI. I, f 21.) 



T. testa prof mide pseud-uinbilicata, solidula, pyramidata, 

 conica, anfractibus septem vel octo, apicali subacuto, interdutn 

 fere rectis, inter dum supra suturas tumidulis, quasi grada- 

 tulis, vivide viridi-coloratis, et radiatim longitudinaliter 

 rubro varii-pictis, flajuuiis superne in omnibus speciminibus 

 haud variantibus, infra, in ultimo anfractu nunc condensatis, 

 nunc tenuibus, vel fulgetrinis, anfractibus omnibus undique 

 spiraliter liris granulosis inst7^uctis, superne quatuor vel 

 quinque ordinibus lirarum, ultimo quinque vel sex, ad 

 peripheriam angulato, basi subplanato, viridi, et delicate 

 rubripicta, liraruni quinque ordinibus prcedita, interdmn 

 granulis evanidis, inter dum, et scepius, distincte granulosis, 

 striis concentricis inter stitialibus, apertura quadrata, intus 

 iridescente, crassilirata, labro exteriore crassiusculo, columella 

 iridescente, plicata, margine vix crenato, basi intus crenulato. 

 Operculo corneo, cartiligineo, multispirali, 



Alt. 25, sp. maj., diam. 25 mm. 



Hab. Entrance to Persian Gulf (G. of Oman). 



A great many specimens, all nearly similar, but with a 

 slight tendency to vary in granulosity of spiral lirse, and 

 also, in some instances, in tumidity of the lower part of the 

 central whorls. 



