457 



of them is still young, the other one is adult, but has a large hole in the spire and the 

 cohimellar margin is broken ; it is alHed to P. rotatoria v. d. Busch, Icnconiphala Mlldft". and 

 epiplatia MUdff., but may be at once distinguished by its very convex base. If placed on a 

 level surface, the new species has its upper surface much more incHned than any of the allied 

 forms, it has two vvorls less [epiplatia has even óy,, whorl). 



CochlOStyla Ferussac. 



1 . CocJilostyla (Corasia) ptiella Broderip var. siibpiiella Pilsbry. 



Tryon/Pilsbry. Man. of Conch. 2^ Series, Vol. VII, p. 121, PI. 24, fig. 19 — 21, 24, 26. 

 Pfeiffer. Nov. Conch. Vol. IV, p. 114, PI. 126, fig. 6, 7, (lais var.). 

 FULTON. Proc. Mal. Soc. Lond. Vol. III, 1S99, p. 214, [lais). 



Stat. 133. Lirung, Salibabu-island. 12 Spec. 



Of the I 2 specimens, there is but one that possesses only the peripheral band, the other 

 specimens have a larger or smaller number of narrow lines of lighter colour, as in Pfeiffer's 

 figure (1. c.) and as those of Pilsbry. The variety, originally recorded from Tukan Besi by 

 Pfeiffer, has already been recorded by Fulton as lais, from Talaut, by Pilsbry from the 

 Philippines. A specimen from Fulton in my private coUection is multifasciate, but otherwise 

 perfectly agrees with the Siboga-specimens. 



2. Cochlostyla (Crystallopsis) najas Pfeiffer. 



Pfeiffer. Symb. Vol. III, p. 71. 



• Monogr. Heliceorum, Vol. I, p. 261. 



Philippi. Abb. u. Beschr. neuer od. wenig gekannter Conch. Vol. II, p. 185, PI. 9, fig. 5. 



Reeve. Conch. Ie. Vol. VII, Helix, fig. 484. 



v. Martens. Ostas. Landschn. p. 330, PI. 18, fig. 4. 



Stat. 133. Lirung, Salibabu-island. 4 Spec. 



The only species hitherto known from the Talaut-isles, belonging to the same section, 

 is, as far as I am aware, C. physalis Pf ; the Siboga-specimens however, do not agree with 

 Pfeiffer's description or figure of the latter species, but very well with his uajas, especiallv 

 with Philippi's figure, they have the fine spiral striae, mentioned by the last named author, 

 but not by Pfeiffer or v. Martens. The narrow, yellowish, subsutural band, figured by Philippi, 

 which v. Martens could not find, is present in some of the specimens; it seems to be more 

 a layer of enamel below the suture, visible by the transparency of the shell, than a true 

 colour-band. 



Amphidromus Albers. 

 T. Amphidroimts interrtiptus Muller var. infraviridis v. Martens. 



V. Martens. Ostas. Landschn. p. 344, 347, PI. 20, fig. 2, 5, 8. 

 Tryon/Pilsbry. Man. of Conch. 2<i Series, Vol. XIII, p. 151, PI. 52, fig. 59—65. 



Stat. 16. Bay of Kankamaraan, South coast of Kangeang. 5 Spec. 



5 



