212 MR. G. B. SOWERBY ON NEW SPECIES OF SHELLS. [Mat. 20, 



violacea, polita, zona externa transmeante et limhum attinyente ; 

 peristoma expansum ; margine dextro tenue, leviter rejiexum ; 

 columellari leviter incrassatum, rotunde rejiexum, umbilicum 

 partini obtigente. 

 Diam. 32, alt. 15, apert. long. 1.5, lat. 13 millim. 

 Hub. Mindanao. 



A species of very distinct character. The whole surface (excepting 

 that of the nuclear whorls) is covered with jirickly granules, sur- 

 mounted bv short, erect bristly hairs. Otherwise the shell is some- 

 what like H. succincta (H. Adams) of the Isle of Formosa, but with 

 a more depressed spire and ventricose base. 



A single specimen was brought by Dr. Hungerford from the 

 Island of Mindanao. The shell is in perfect condition. 



Helix cyclostremoides, sp. nov. (Plate XI. fig. 14.) 



H. testa late et perspective umbilicata, depresso, sordide alba, iibique 

 corrvgata ; spira concavo-depressa ; anfractus h, celeriter 

 accrescentes ; i^rimi 2 IcBves, fusco tincti ; tctteri concavi, carina 

 elevata serrulnta niarginati ; ultimus acute tricarinatus ; carina 

 wediana waxirna. Apertura hexagonalis ; peristoma acute tri- 

 angulatum. 

 Diam. 11, alt. G millim. 

 Hab. M'tul, between Morocco and Mazagan. 

 A very remarkable little species submitted to me for description by 

 Mr. J. Ponsonby, who suggested the name " cyclostremoides " from 

 its resemblance to some of the species of the marine genus Cyclos- 

 trenia. The three keels are very conspicuous, especially the centre 

 one. The wliole surface of the shell is curiously corrugated. 



Cytherea (Caryatis) mungerfordi, sp. nov. (Plate XI. fig. 4.) 



C. testa cordata, valde incequilatera/is, tennis, leviter inflata, alba, 

 untice eoncentrice sulcata, deinde obscure irregulariter rvgata. 

 Umbones prominentes, incurvati, subspirali. Margo dorsalis 

 unticus brevis, leviter urcuatus ; posticus elongatus, declivis, vix 

 iircvatvs, obtuse angulaius ; ventralis arcuatus. Lunula lata, 

 vix impressa. Area postica elongata, leviter concava. Liga- 

 mentum anguste elongatum. Denies cardinales valvce sinistra 

 duo, inaquales ; antico valde prominente, acutiusculo, postico 

 lato, lamellari, fossa lata et profunda, subtrigona diviso, fovea 

 excavata antice et postice instructo. Curdo in valva dextra, 

 dentibits du.obus upproximatis, acutissimis valde prominentibus, 

 antice lamina marginali angiilalo-elevata, postice lamina obliqua, 

 elevata, sinuosa, partim divisa munitus ; profunde interfossalus. 



Diam. untero-post. 20, umbono-marg. 17, crass. 14 millim. 



Hab. Hongkong (Dep.-Surg.-Gfu. Hungerford). 



A single specimen in perfect condition of this interesting species 

 was found by Dr. Hungerford at Hongkong, together with two 

 perfect specimens of a somewhat similar shell, with tlie same Iso- 

 cardia-WVe incurved umboes, which I found to be Arthur Adams's 

 CuUocardia guttata (Ann. k Mag. Nat. Hist. 1864, ser. 3, xiii. 



