MELVILL : MOLLUSCA FROM PERSIAN GULF, ETC. 241 



Ctclostrema quinquestkiatum, 11. sp. PI. XII, Figs. 2, 2rt, 2b. 



C. testa (lepresso - conoidea, rninuta, alba, siibpellucida, late 

 unibilicata, spira paullulum conica, aiifractibus 4, quorum apex ipse 

 perparvus, nitidus, vitreus, cseteris ad suturas impressis, nitidis, 

 undique laevissimis, ultimo ad peripheriani carinato, marginato^ 

 teiiuissime spiraliter sub lento 5 striate, regione umbilicari baud 

 ])rofunda, apertura circulari, intus alba, raargine columellari paullum 

 calloso. Alt. 1, diam. 2 mm. 



llab. — Persian Gulf, Mussandam, at 55 fatboms. 



A minute, sniootb, glassy species, witb certain Etbalioid cliaracter- 

 istics, sucli as tbe sligbt thickening of the umbilicar region, and 

 conse(]ueiit shallowness of tlie umbilicus itself. The body-whorl is 

 keeled, five spiral striae being here present on and about the periphery. 

 Unlike any other Cyclostrema known to us in more than one way. 



Ctclostrema spiculigerum, n.sp. PL XI, Pigs. 1, \a. 



C. testa parva, depresso-discoidali. alba, profunda umbilicata, 

 subhyalina, anfractibus 4, apicalibus duobus inclusis, omnibus apud 

 suturas multum iuipressis et late canaliculatis, regione infrasuturali 

 phiuata, aliter usque ad umbilicum spiraliter tenuiliratis, lira superiore 

 anfractus ultimi spiculis brevibus lequidistantibus decorata, apertura 

 rotunda, peristomate tenui, continuo. Alt. 2, diam. 3 mm. 



Hub. — Persian Gulf, on the Telegraph cable. 



A very elegant, though small species, remarkable for the coronal 

 of equidistant, abbreviated spicules wliicli denote the uppermost, and 

 most strongly developed of the spiral lirse in the two lowest whorls. 



GiBBULA erythracme, u.sp. PI. XI, Fig. 2. 



C. testa soliiiula, incrnssata, anguste umbilicata, conica, brunnea, 

 anfractibus 5, quorum apicales duo iseves, detriti, cteteris ad suturas 

 et peripherialiter obscure nodulosis, ultimo ad peripheriani obtuse 

 bicarinato, superficie omni irregulariter spiraliter striata, brunnea, ad 

 basim circa umbilicum hie illic obscure maeulata, tribus supernis 

 anfractibus clare ])uniceo-depictis, apertura oblique ovata, peristomate 

 incrassato. Alt. 5, diam. 5' 15 mm. 



Hab. — Bombay (A. Abercrombie). 



A somewhat solid, brown, rudely constructed Gibbula, brightened 

 by the intensely carmine hue of the three uppermost whorls. Allied 

 to G. Banieli, Ad. 



ScALA Alizon^, n.sp. PI. XI, Fig. 3. 



Sc. testa delicatissima, eleganter f usiformi, parumriniata, anfractibus 

 11, quorum apicales 3-4 Iteves, pernitidi, Ifete castanei, quatuor his 

 proximis castaneo-sulfusis, tribus ultimis solum puris, candidis, 

 anfractibus omnibus rotnndatis, apud suturas profunde impressis, Itete 

 et arctissime longitudinaliter finibriato-costellatis, costis vel lamellis 

 papyraceis, undique spiraliter decussatira liratis, interstitiis sub- 

 quadratis, numero lamellarum ultimi anfractus circiter 36, apertura 

 rotunda, peristomate continuo, margine columellari lato, nitente. 

 Alt. 11, diam. 4"75 mm. 



Hab. — Persian Gulf, Mussandam, 55 fathoms. 



