VERMETUS. 171 



flattened laminae ; one on either side of the columella, and a dis- 

 tinct line on the middle of the columella. 



Philippines. 

 This is V. renisectus, Carp., in part. Morch describes vars. 



GORDIALIS, ASPERULA, ASPERELLA, WOODWARDII, Carp., EBENEA, 

 PICEA, INDENTATA, MONILIFERA. 



Y. CONTORTUS, Carpenter. PI. 49, fig. 27. 



Laterally attached, chestnut-color, rather thin, irregular^ con- 

 torted, first whorls spiral, usually in contact, the last protracted, 

 closely longitudinally lirate, decussated by incremental lines, the 

 intersections very obsoletely nodulose ; interior without lamella, 

 but with 3-5 spiral lime on the columella. 



Mazatlan and Gulf of California. 



Morch adds vars. REPENS, FAVOSA, CONTORTULA, INDENTATA and 



CORRODENS. 



Y. NERINOIDES, Carp. PL 49, figs. 28, 29 ; PI. 48, fig. 13. 



Closely agglomerated, irregularly spirally twisted, orange- 

 colored, almost everywhere superficially ashy ; whorls separate, 

 yet approximating, line somewhat compressed, very obsoletely 

 nodosely contracted, interstices rather wide, with close incre- 

 mental striae; internal lamella (fig. 13) large, modifying the inte- 

 rior as in a section of Nerin&a. 



A u sir alia. 

 Y. OCTOSECTUS, Carp. PL 48. fig. 14. 



Solitary, laterally affixed, whitish, irregularly spirally twisted, 

 longitudinal lira? rather remote, reticulated by closer, rugose 

 incremental lines, with distant transverse orange lines; interior 

 laminae prominent, lateral, the exterior part of the chamber small 

 in the first and large in the last whorl, columellar line acute. 



So. Africa? Bed Sea. 



" T have seen specimens with and without internal laminae 

 attached on the same shell. One specimen shows on the outer 

 wall a sharp keel pointing to the slit between the laminae, which 

 I have never elsewhere seen so well developed. According to 

 Carpenter, it differs from the following species in the absence of 

 the ' remarkable ' structure at the base, and in the comparatively 

 small size of the outer chamber ; the former character is prob- 

 ably quite accidental, and the latter is not constant in one and 



