426 



Aperture elono-ated, angular above, peristome thin, with a wide sinus above, then protracted, 

 columellar margin nearly straight, only slightly concave above, ending in a rather long, narrow 

 canal, covered with a thin layer of enamel. Interior of aperture smooth. 



Alt. i87„, lat. 6; apert. alt. 11, lat. 27^ Mill. 



Alt. isYa, lat. 5; apert. alt. 7, lat. i^g- 



This species, at least the largest specimen, has in outline much resemblance with the 

 West-Indian 5. syngenes Wats. (Challenger Gastrop. PI. 20, fig. 2) but is different in sculpture, 

 though the tubercled keel is very like. If I had seen only 2 extreme specimens, I certainly 

 should have been induced to describe 2 species, the nucleus is in several specimens loosely 

 coiled, the spirals differ considerably in strength, the subsutural granules may be faint or 

 entirely wanting, but these differences are intercrossing, so that I cannot trace a line of demarcation 

 between them and so I left them together. 



10. S^irctila pttlchra n. sp. PL XXVIII, fig. 2. 



Stat. 212. 5°54'.5S., 120° 19.2 E. Banda-sea. 462 M. Fine grey and green mud. i Spec. 



Shell shortly fusiform, with short canal and pyramidal spire, rather thin, white. Nucleus 

 wanting. Remaining whorls 6, angular, separated by a conspicuous, waved suture, their upper part 

 excavated. Sculpture consisting of narrow axial ribs, 14 in last whorl, oblique in upper whorls, 

 elegantly flexuous in last one and a row of oblique, short plicae, on a faint subsutural rib ; the 

 axial ribs end in rather sharp tubercles in their upper part at the limit of excavation; the ribs 

 are crossed by narrow spiral lirae, 3 more conspicuous and some fainter ones on penultimate 

 whorl, numerous, rather unequal ones on last whorl; in crossing the ribs, they produce still 2 

 fainter tubercles on the lirae of penultimate whorl ; numerous ones on last whorl, but not on 

 canal, where the ribs disappear; moreover the shell is crossed by very fine growth-striae, more 

 conspicuous in excavation and fine spiral striae, of which about 2 in excavation. Aperture oval, 

 angular above, ending in a short, wide canal below, slightly directed to the left ; peristome 

 thin, broken, according to growth-lines with a moderately wide and deep sinus, then protracted ; 

 columellar margin concave above, slightly tortuous at the canal, with a thin layer of enamel; 

 interior of aperture smooth, white. 



Alt. 17Y0, lat. 8; apert. alt. 9, lat. 3 Mill. 



This species is remarkable for its elegant sculpture. 



11. Sttrcula trophonoidea n. sp. PI. XXVIII, fig. 3. 



Stat. 45. 7°24'S., 118° 15'. 2 E. Flores-sea. 794 M. Fine grey mud, with some radiolariae and 



diatomes. i Spec. 

 Stat. 178. 2°4o'S., 1 28° 37'. 5 E. Ceram-sea. 835 M. Blue mud. i Spec. 



Shell fusiform, with moderately long canal, thin, white. Nucleus eroded. Whorls 8, angular, 

 separated by a conspicuous, slightly waved suture, upper part excavated. Sculpture consisting 

 of narrow, oblique ribs, ending at the excavation with small, slightly pointed tubercles; the 

 excavation is nearly smooth, but with short plicae on a faint subsutural rib, more conspicuous 



62 - 



