100 EEY. R. BOOG WATSON ON THE 



1. Cerithitjm (Teiforis) levukense, n. sp. 



July 29, 1874. Levuka, Fiji. 12 fms. 



Shell. — Sinistral, sharply conical, with a narrow and produced 

 base, solid, yellowish white, glossy. Sculpture. Longitudinals — 

 there are (on the last whorl) about twenty longitudinal rows of 

 round tubercles, which rows form a small rib across the whorl, 

 and are more or less continuous up the spire ; these continue 

 on the base as strongly as on the upper part of the whorls. 

 These rows are parted by shallow rounded depressions. Spirals — 

 the longitudinal rows are cut by narrow little rounded grooves, 

 whose intersection with them forms the tubercles. On the upper 

 whorls there is only one such spiral groove, so that there are only 

 two tubercled spirals, but the groove gradually widens, and there 

 appears in the bottom of it a minute additional spiral, which finally 

 becomes as large as the other two ; on the base are 3 equally 

 divided tubercled spiral threads, of which the inmost is the smallest, 

 and it ceases at the siphonal tube. The apex consists of 6 small 

 rather elongated narrow whorls, of which the first 1J have about 

 ten rows of minute tubercles faintly connected by spirals ; the 

 next 4| whorls are crossed by about 24 longitudinal sharp 

 little ribs, rising into points at the carina, which is a continuous 

 spiral thread. This carina on the first of these whorls is near the 

 base, but later it rises so as to encircle the upper part of the 

 whorl. The minute spiral rows of tubercles, which alone appear 

 on the first whorl and half, cover the whole surface (both ribs and 

 interstices) on the later apical whorls. The regular 

 sculpture does not begin abruptly and at once, but a M 

 tongue of this new sculpture breaks across the top of the $fi§ 

 whorl, while the lower part retains the earlier ornamen- 

 tation. Colour. The apical whorls are amber, the rest of the shell 

 yellowish white, with a narrow amber-coloured thread within 

 the contraction of the base of each whorl ; this spiral thread is 

 not continuous, being interrupted by each of the longitudinal 

 rows of tubercles. Spire high, sharply conical, with a very slight 

 convexity in its lines of profile, which are not perfectly alike. 

 Apex a narrow and perfect cone, ending in a small rounded point. 

 Whorls 17, of very regular increase, flat on the side ; the whole 

 last whorl is contracted and a little elongated ; the base is narrow 

 and flat. Suture sharply impressed, and broader than the spiral 

 grooves, being marginated on its upperside by a minute flat 

 surface, which runs round the base of the superior whorl. Mouth 

 almost more than perpendicular, square, with a largish auricle at 



