425 



The specimens tVoni StaC. 137 arc very small and iiotuilhslaiulln^ the great (liTfcrcnce 

 in clci)th, seem to belong" to this species, the sculpture Ix'iiiL; idciilical, lluir luiclcus is jcllowish- 

 brown and consists of about 1'/.. smooth, convex whorl. 



This s[)ccics, which in main' respects resembles some, oilier species of the section (iciiniiiila^ 

 differs bj- its sinus above the shouKler. near the suture. In sculpture it has souk! resemblance 

 with BrachytoDia subsiitnralis v. Martens. 



8. Stu'cula inidosa n. sj). PI. XXVII, fio-. 13. 



Stat. 45. 7° 24' S., 1 18° 15.2 E. Flores-sea. 794 M. Fine grey mud with some radiolariae and 

 diatomes. i Spec. 



Shell elongately fusiform, with rather long canal, rather strong, yellowish-white. Apex 

 wanting, remaining wdiorls 6Y2, separated by a conspicuous, simple suture, convex, slightly 

 excavated at their upper part. Sculpture consisting of numerous, very irregular, spiral striae, 

 more conspicuous at the base of shell and canal, scarcely traceable in the excavation ; upper 

 wdiorls with a peripheral row of obtuse tubercles, which in the uppermost wdiorls have the 

 character of ribs; these tubercles disappear on last whorl, which has only a more prominent 

 keeldike spiral just below the excavation; the whorls are moreover crossed by numerous growth- 

 lines, strongly curved and conspicuous in the excavation, oblique and sometimes rib-like in the 

 lower part, which produces a wavy appearance of some parts of the shell. Aperture oblong, 

 angular above, ending below in a rather long, broad canal, slightly directed to the left; peri- 

 stome broken, but according to growth-lines with a deep sinus at the suture, then strongly pro- 

 tracted; columellar margin regularly curved, with a thin layer of enamel, slightly contorted along 

 the canal. 



Alt. 30, lat. II; apert. alt. 15, lat. 4Y0 Mill., the breadth of shell and aperture may 

 have been more, if the peristome were complete. 



I know no species which is nearly allied amongst the species from the Indian ocean ; 

 Mr. Smith, who has kindly compared this and the following forms, could not identify them 

 with any of the species, figured or unfigured, described by him in past years. 



9. Surcula variabilis n. sp. PI. XXVIII, fig. i. 



Stat. 178. 2°4o'S., I28°37'.5E. Ceram-sea. 835 M. Blue mud. 12 Spec. 



Shell elongately fusiform, with long canal, thin, yellowish-white. Whorls 8, of wdiicli 

 about 2 (if normal) form a smooth, slightly inflated, reddish-brown nucleus; post-nuclear w^horls 

 subangular, concave in their upper part, separated by a conspicuous waved suture. Sculpture 

 consisting of a row of tubercles at the periphery, sharper in upper whorls, more obtuse lower 

 on, a row of granules, just below the suture, becoming scarcely visible in last whorl and entirely 

 or nearly wanting in some specimens, the lower part of whorls with 1 or 2 rather faint, spiral 

 lirae, the part of last whorl below the keel, with more or less conspicuous spirals, which vary 

 from regular flat lirae to more irregular rib-like on^s; in the latter case mainly 2 spirals are 

 stronger; moreover there are extremely fine spiral striae and rather conspicuous growth-striae. 



61 



