210 PSEUDACHATINA. 



greenish-brown. The form and basal color also differ: P. 

 sod oil is always ovoid, more or less elongate, with the last 

 whorl of the spire swollen and large, measuring behind almost 

 half of the total length of the shell, while in P. downesii the 

 last whorl is noticeably smaller, and the lateral outlines of 

 the spire are nearly straight. The base in P. sodeni lacks the 

 continuous dark tract distinguishing P. downesii and several 

 other species; it is replaced by wide flames, which are not 

 confluent. The peripheral angle is very weak, always less 

 emphatic than in P. downesii. The length varies between 76 

 >and 105 mm. 



Pig. 18 is from Kobelt's type figure; fig. 19 from d'Ailly. 



5. P. PYRAMIDATA Kobelt. PL 4, figs. 14, 15. 



The shape is almost strictly conic. The sculpture consists 

 of rather regular, oblique riblets, with no trace of tubercles; 

 but on the median whorls there is a girdle beset with little 

 knots above the suture, bounded by a distinct, groove above. 

 The last whorl is visibly angular, with a few incised spiral 

 furrows, and scarcely any markings, whilst the upper whorls 

 are checkered with red and white, as in 'bucliliolzi. The aper- 

 ture is yellowish- white, bluish below; the callous with a dis- 

 tinct band above ; the peristome reflexed and brown-bordered. 

 Length 71, diam. 33, oblique alt. apert. 27 mm. 



P. downesii var. pyramidata KOBELT, Conchyl. Cab., p. 17, 

 pi. 8, f. 2, 3. 



Habitat unknown. Description and figures are from Kobelt. 



5a. Var. KOBELTIANA Pilsbry, nov. PI. 7, fig. 37. 



Large and solid, elongate, with conspicuously convex lat- 

 eral outlines. Surface smoollnsh, with no tubercles, ribs or 

 waves. Last two whorls rich red-chestnut, with a conspic- 

 uous white band beloiv the suture, the base darker. Preced- 

 ing three whorls decorated with broad red-brown flames on 

 a nearly white ground, the apex purple. Whorls fully 8y 2 , 

 slightly convex, impressed and weakly plicate below the 

 siil ure, and with a convex girdle limited by a furrow above 

 it. Last whorl indistinctly angular in the middle. Aperture 



