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columellae semiobtecto instructo sunt". In other respects, especially in sculpture of the base, 

 the specimens perfectly agree with typical ones, received from Japan. 



5. Xenophora gigantea n. sp. PI. XIII, fig. i. 



Stat. 38. 7°35'.4S., ii7°28'.6E. Flores Sea. 521 M. Coral. 2 Spec. 



Shell large, trochiform, more or less umbilicate, thin, yellowish-white; whorls about 8, 

 nucleus smooth, subsequent whorls slightly convex, with irregular surface, lower ones sculptured 

 with diagonal, undulating wrinkles, which are moderately strong and are crossed by much feebler 

 growth- striae; suture linear, undulate; the upper surface with various objects agglutinated along 

 the suture and at the peripheral keel of last whorl, these objects consist of small stones and shells, 

 which leave however a large part of the shell free, perhaps with exception of the upper whorls, 

 which seem to have been quite covered, but to have lost the foreign bodies. Last whorl sharply 

 carinated, with a rather broad margin, marked by a broad, shallow canal on the upper surface; 

 base concave, chiefly by the declining border, nearly smooth, but marked under the lens with 

 faint growth-striae, which are strongly curved towards the distal zone, moreover very faintly 

 crispate. Umbilicus in one specimen open, pervious, partly covered by the columellar margin, in 

 the other specimen it is closed by a thin lamina, leaving a pit, which is also partly overlapped 

 by the columella. Aperture large, oval, its free margin thin, arcuate, its columellar and basal 

 margins strongly curved, the columellar one thickened and reflected, a thin layer of enamel on 

 the body whorl connects the margins. Operculum corneous, thick, nucleus lateral, with a few 

 coarse and very close-set, undulating striae. 



Alt. about 60, diam. 98; apert. lat. 67 Mill. 



This species, by the sculpture of the base allied to X. pallidiila Rve, has a much finer 

 sculpture, indeed it is nearly smooth, moreover it is considerably larger, the shape of the basal 

 surface is much more oval, the whorls are less convex, and much less covered by the foreign bodies, 

 which are mainly smaller, are placed more remote and consequently leave a larger part of the 

 lower whorls free. In this respect (if only seen from above) it has some resemblance with A', calcu- 

 li/ era Rve., which has however more convex whorls and a totally different sculpture of the base. 



6. XenopJiora (Tugurumt) exuta Reeve. 



Reeve. Proc. Zool. Soc. Lond. 1842, p. 162. 



Conch. Ic. Vol. I, Phorus, fig. 7. 



KlENER. Coq. Viv. Vol. X, p. 430, PI. 22, fig. i. 



Tryon. Man. of Conch. Vol. VIII, p. i6i, PL 46, fig. 90, 91. 



Stat. 294. io°i2'.2 S., I24°27'.3 E. Timor Sea. 73 M. Soft mud with very fine sand. 10 Spec. 

 The specimens are young and very thin ; the largest has (inclusive the projections at 

 the keel) only a diam. maj. of 55 Mill. Fischer in Kiener's Coq. Viv. (I.e.) states a diameter 

 of 75 and even of 81 Mill., Tryon of 2^4 inches, corresponding to about 70 Mill. Only 3 of 

 the specimens have agglutinated each one foreign body, consisting in a specimen of a small 

 valve, in the other two of small fragments of Pelecypoda. 



The species has, as far as I am aware only been recorded from China and Japan. 



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