ingular above, peristome thin, with ;i wi«l<- sinus above, then protracted, 

 ir margin nearly straight, only slightly concave above, ending in ;i rather long, narrow 

 with a tliin iayer ol enamel. Interior ol aperture smooth. 

 Alt. i8' .. lat. 6; apert. dt. i i . lat. 2 1 /, Mill. 

 Alt. 13' „ lat. 5 ; apert. alt. 7, lat. 1 



This specii s, al least the largesl specimen, has in outline much resemblance with the 

 t-Indian .S'. syngenes Wats (Challenger Gastrop. PI. 20, fig. 2) but is different in sculpture, 

 though the tubercled keel is very like. If 1 had seen only 2 extreme specimens, 1 certainly 

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

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

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

 between them and so I left them together. 



i". Surcula pulchra n. sp. PI. XXVIII, fig. 2. 



Stat. 212. 5 54.5 S., 120 iw..' E. Banda-sea. 462 M. Fine grey and green mud. 1 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 

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

 intly 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 1 by narrow spiral Iirae, 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 line spiral striae, of whi.ch 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 growthdines 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. 17 1 /.., lat. 8; apert. alt. 9, lat. 3 Mill. 



This species is remarkable for its elegant sculpture. 



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



Stat. .; . 5., 11 15'. 2 E. Flores-sea. 794 M. Fine grey mud, with some radiolariae and 



diatomes. 1 Spec. 

 Stat. 178. 2°4o'S., 12S 37'. 5 1'".. Ceram-sea. 835 M. Blue mud. 1 Spec. 



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



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



lique ribs, ending at the excavation with small, slightly pointed tubercles; the 



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



62 



