4^5 



2 v Pri/h'a fii)io)'ciisis w. sp. IM. XW'I, finr. lo. 



Stat. 2S5. Near south coast ot Timor. 34 M. Limit l)Lt\vccii mud and coial. Ijlliotli.imnion. i Spec. 



Slu'll c>l(Mio;Ucly rusiforin, .slrono-, ixHldish-browii. Wliorls 7, of which about i '/, foi'iii a 

 siiic~)(^lh nui-K'us ; post-iuiclear whorls inoctcratcK- coiivcx, with a strono' Hratioii below tlic suture 

 and tVoni 3 to 4 lirae on tluir lower part, 1 1 on last whorl, moreover the shell is covered with 

 tine spiral striae and growthdines, and is cro.sscd by thick, rounded, oblique ribs, i 2 in number 

 on penultimate whorl, which o^ive the shell an elegantly beaded a[)pearance, last rib before 

 peristome very thick. Aperture elongately oval, peristome thick, with a rather shallow sinus above, 

 protracted lower on. Columellar margin concave above, rather straight below, with a strong 

 layer of enamel, interior of aperture as in preceding species, but less bluish. Canal straight, 

 rather narrow. 



Alt. 87,, lat. 2-7,; apcrt. alt. 37,, lat. i Mill. 



Still nearly allied to the preceding species, from which it differs by a smaller number 

 of spiral lirae, the fine spiral striae and a larger number of ribs. Though it may be possible, 

 that if more specimens could be compared, these differences would prove to have only varietal 

 rank, the spiral striation induced me to keep them provisionally separate. I find no trace of 

 it in the preceding form. 



24. Drillia batjanensis n. sp. PI. XXVII, fig. i. 



Stat. 139. o°ii'S., 1 27° 25' E. Near Batjan. 397 M. Mud, stones and coral, i Spec. 



Shell fusiform, strong, whitish. Whorls 6, of which 3 form a large, convexly-whorled, 

 smooth and shining nucleus. Post-nuclear whorls moderately convex, slightly concave below a 

 strong, yellowish, subsutural spiral. Sculpture consisting of this spiral and some other ones, 7 

 in number on penultimate, 22 and a few intermediate ones on last whorl, stronger on lower 

 part of upper whorls and on median part of last one ; the spirals are crossed by conspicuous 

 growth-striae, stronger in the interstices, which are broader near the base. Aperture oval, angular 

 above, peristome strong, with a rather wide, deep sinus above, protracted lower on, bordered 

 exteriorly by a strong, rounded rib ; columellar margin slightly concave above, nearly straight 

 below, with a strong layer of enamel, forming a wall at its upper extremity, bordering the sinus; 

 canal rather wide, slightly directed to the left, interior of aperture smooth, white. 



Alt. 773, lat. 37^; apert. alt. 37., lat. i Mill. 



This species, which with the 3 preceding ones forms a somewhat peculiar group, has 

 some resemblance with D. circumvertens Melv. & St. (Proc. Zool. Soc. Lond. 1901, p. 436, 

 PI. 23, fig. 23), but a close comparison with the description and figure, gives the following 

 differences ; that species has 8 whorls, a much smaller nucleus of but 2 whorls, it is keeled, 

 which cannot be said of the new species, which has the lirae more regular, on the base the 

 lirae in D. circzimvertens are much more close, the total number of lirae however is larger. 



25. Drillia Sibogae n. sp. PI. XXVII, fig. 2. 



Stat. 51. Madura-bay. '69 — 91 M. Fine grey sand, coarse sand with shells and stones. 2 Spec. 

 Stat. 260. Near North point of Nuhu Jaan. Kei-islands. 90 ]\I. Sand, coral and shells, i Spec. 



51 



