OCR Text |
Show 484 MR. E. A. SMITH ON NEW SHELLS. [JlUie 15, granules is finely, irregularly, and somewhat obliquely striated; the base exhibits intermediate concentric striae between the rows of granules. The carina, visible upon the body-whorl, winds up the spire just above the sutural line, and upon the upper whorls especially is furnished with numerous, somewhat tubulous short spines, which, lying upon the volution beneath, give to the sutural line a festooned appearance. No locality, unfortunately, is attached to this shell, but it is probable that it is a Chinese or Japanese form. LIOTIA CRASSIBASIS. (Plate XLVIII. fig. 10.) Testa solida, umbilicata, alba. Spira brevis, ad apicem depressa. Anfractus 4, superne plani, vix declives, deinde angulati, carinis duabus (quorum superior ad angulum sita) et plicis tenuibus supra carinas acute subnodosis clathrati, lirisque tenuibus supra angulum circiter quatuor, infra eum duabus cincti, incremenli lineis elevatis ornati. Anfr. ultimus plicis versus labrum longe majoribus superneque haud planatis, infra carinam infe-riorem late constrictus, liris pluribus granulatis concinne ornatus, ad basin circa umbilicum porca convexa, versus aperturam latissima, spiraliter et longitudinaliter obsolete lirata Apertura circularis, margine basali crassissimo, intus pallide fusco-margaritacea. Long. 12 mill., diam. 14. Operculum extus seriebus concentricis granulorum calcareorum ornatum. Hab. ? This is a remarkably sculptured shell and very peculiar in form. The upper whorls and half the last one are flattened at the top, and scarcely slope at all. The last half of the body-whorl, however, upon which the plicae become very much larger than those above, is a little convex. The lines of growth are elevated, excessively close together, and cover the entire surface of the shell, being continuous upon the keels and lirae and in the interstices between them. The plicae are somewhat acuminately produced upon the upper carina, which, when viewed from above, presents a prettily festooned appearance. The immense thickening at the base of the body-whorl is very remarkable, and forms an excessively thick base to the aperture. Between this thickening and the lower keel the whorl is a little constricted or concave, especially so towards the mouth; and in this part the transverse lirae, about twelve in number, are finely granulose. The plicae do not extend below the keels, nor do they interrupt the spiral lirae, the latter being continuous on and between them. PALUDINA SPEKEI. (Plate XLVIII. fig. 11.) Testa pyramidali-ovata, late umbilicata, sub epidermide olivacea albida, versus apicem lilaceo-fusca. Anfractus 6, superne sub-humerosi, ad latera parum convexi, spiraliter minutissime striati lineisque elevatis paucis subeequidistantibus subgranosis cincti. |