COCHLOSTYLA. 243 



am figured by Dr. A. Binney in Terr. Moll. Ill, p. xlvi, lowest fig., 

 but the streaks are of a rich reddish-chestnut. It is also, in coloring, 

 very similar to the form of H. milleri which I have figured em pi. 

 32, fig. 40 of the Manual of Conchology (2), vol. V. From this 

 species, which is its nearest ally, the H. xanthophaes is distinguished 

 by its smaller size, smoother surface, more flatly and angularly 

 reflexed columella, etc. 



The typical coloration is described above, but additional examples 

 show much variation. Some are a delicate pink-white with a white or 

 dark peripheral band, or both, as described above, the apical whorls 

 purple or red-brown. The peculiar form of the columella is con- 

 stant, as is also the extremely narrow umbilical fissure, which is 

 practically the same at all stages of growth. 



Genus COCHLOSTYLA (Fer.) Semper. (Vol. VII, p. 92.) 



The number of sections recognized in Vol. VII, although already 

 large, should probably be increased by two : Crystallopsis Ancey, 

 including the Papuan and Solomon Island forms hitherto referred 

 to Corasia, and Papustyla for the species translucida Q. & G., 

 papuensis Hedley, hindei Cox and heimburgi Branc. 



Section CRYSTALLOPSIS Ancey. 



The axis is perforated, at least in the typical forms, although 

 often covered in the adult ; and the jaw (of C. conformist is smooth, 

 although the rest of the anatomy is like Cochlostyla. This difference 

 in the jaw is quite insufficient to cause us to remove the section from 

 Cochlostyla; for cases of odontognathous Helices becoming oxygna- 

 thous by degeneration of the ribs of the jaw are common. This 

 modification is usually not accompanied by any important changes 

 in other organs, and in many groups is of barely specific value. 

 For the present, this section may include groups 1 and 2 of my 

 arrangement of Corasia in Vol. VII, p. 105. 



Vol. VII, page 106. For allisteri, read allasteri. 



C. WOODFORDI Sowerby. PI. 57, fig. 14. 



Shell imperforate, subconvex, thin, pellucid, buff-white, irreg- 

 ularly malleated, obliquely striated, spire short conical, rather 

 obtuse. Whorls 4, rapidly increasing, slightly convex, the last 

 inflated, acutely carinated at the periphery, with an opaque white 

 line at the carina. Aperture large, oblique ; perixtome reflexed, red. 

 (Sowb.~) Guadalcanar, Solomon Is. 



Helix (Corasia) woodfordi SOWB., P. Z. S. 1889, p. 578, t. 56, f. 6. 



