359 



2. Latiaxis Sibogae n. sp. PI. XXI, fig. 8. 



Stat. S9. Pul u Kaniungan ketjil. Reef. 1 Spec. 



Shell elongately-biconical, white. Whorls about 7, of which the upper one forms a rather 

 smooth but not quite intact nucleus ; subsequent whorls angular, obliquely flattened above, 

 contracted towards the deep lower suture. Sculpture consisting of 4 strong spiral lirae on 

 body-whorl and numerous intermediate ones; the strong lirae are spinous, the upper one lias 

 long, slender, hollow spines, which are turned up, on the upper whorls is a second row of 

 shorter spines, on last whorl there are five rows at all, of which the thircl is less conspicuous, 

 one or two rows on the canal are likewise more prominent, moreover the whole shell is covered 

 with lamellae, which in crossing the lirae are squamous, as well on the stronger as on the 

 intermediate lirae. Aperture triangularly roundeel, upper margin short, outer one slightly convex, 

 internally with 4 grooves, corresponding to the strong lirae; columellar margin strongly enamellous, 

 canal rather broad, tortuous, with a free lamella and an umbilical slit behind it, bordered by 

 a row of larger scales. 



Alt. 17, lat. (without spines) about 7 1 /,, (with spines 14); apert. alt. (with canal) 8, 

 lat. 3 MM. 



This species belongs to the group of L. diadema Adams and seems, according to the 

 figure, to be the nearest ally of L. exfoliatus Sow. (Thes. Conch. Vol. V, Latiaxis, p. 3, PI. 1, 

 fig. 15), it is however considerably less convex, the aperture is consequently narrower, the 

 spines are more slender, straighter, more spreading; it agrees by being nearly without umbilicus. 



3. Latiaxis ricinuloides n. sp. PI. XXI, fig. 7. 



Stat. 257. Du-roa-strait, Kei-islands. Till 52 M. Coral. 1 Spec. 



Shell shortly biconical, with short spire, pale yellowish-brown with rosy tints. Whorls 

 6 1 /.,, of which r x / a form a smooth nucleus, foliowed by a short bilirate space; subsequent whorls 

 angular, with a row of spines growing gradually larger, 7 on last whorl ; these spines are slender, 

 spreading, slightly upturned, hollow, rosé coloured in their interior; the upper part of whorls 

 is nearly horizontal, but a little declining, with narrow lirae, occupying also the upper surface 

 of spines and partly squamous, lower part of last whorl with 4 conspicuous lirae, interrupted 

 by varices below each spïne; these varices form short spines or scales, about 2 on each crossiiiL;- 

 point; moreover fine intermediate lirae and slightly squamous growth-striae give a scabrous 

 appearance to the shell. Aperture elongately-triangular, upper margin nearly horizontal, outer 

 one thin, undulated by the lirae, slightly convex, interiorly of a beautiful rose-colour, with a 

 few grooves, corresponding to the lirae, columellar margin appressed above, free below, at the 

 narrow but conspicuous umbilicus, which is bordered externally by a row of coarse, rosy scales ; 

 canal short, wide. 



Alt. 14, lat. (without spines) S 1 /.,, (with spines 19); apert. alt. (with canal) S 1 /.,, lat. 3 1 /, Mill. 



Though this specimen is probably not quite adult, it is too beautiful and characteristic 

 to be neglected. I know 110 species like it. 



113 



SIBOGA-EXrEDlTlE XI.IX 1 ,/. 47 



