158 COCHLOSTYLA-AXINA. 



Subsection 2. AXINA Albers, 1850. 



Axina ALB., Die Hel., p. 113. v. MART., Die Hel. 1861, p. 71 

 (type H. zebuensis). PFEIFFER, Nomencl. Hel. Viv. p. 199, 1878. 

 SEMPER, Landmoll. Phil. 190. v. MOLL., Landschn. Cebu. p. 

 234. Carocolla of some early authors. 



Imperforate shells, varying from globose turbinate to flattened 

 carinated and lens-shaped ; solid, dark colored] more or less covered 

 with a hydrophanous cuticle; the surface smooth or at least totally 

 lacking spiral sculpture; whorls 4i-6 ; lip either narrow or broadly 

 reflexed. 



Anatomy as in Cochlostyla generally. The group seems to replace 

 Calocochlea, on the islands Siquijor and Zebu. 



Key to species of Axina. 



A. Peripheral keel very acute 



b. Lip broad, flat, angled and somewhat guttered at the keel, 

 c. Whorl deflexed at aperture ; diara. about 70 mill., 



garibaldiana,. 

 cc. Whorl not deflexed at aperture ; diam. about 40 mill., 



siquijorensis. 

 bb. Lip narrow, its face not flattened, 



c. Shell about equally convex above and below the keel, 



d. Surface smooth, obliquely streaked above, zebuensis. 

 dd. Surface densely, finely lamellose, not variegated above, 



striatissima. 



cc. Shell flattened below, elevated above the keel carbonarla. 

 AA. Peripheral keel rather obtuse, or periphery rounded 



b. Lip broadly reflexed ; columella distinctly toothed at base, 

 c. Periphery obtusely keeled ; whorl deflexed at aperture 



pfeifferi. 

 bb. Lip rather narrowly reflexed 



c. Alt. exceeding the lesser diameter of the shell; columella 

 broad, milk-white ; periphery rounded or very indistinctly 

 angled. 



d. Cuticle obliquely streaked ; alt. 24, diam. 25 mill., 



bruguieriana. 



dd. Cuticle scarcely streaked ; alt. 27-29, diam. 28-29 mill. 



montfortiana. 



cc. Alt. less than the lesser diam. of shell ; columella pink or 

 brown tinted. 



