HELIX-PATULA. 79 



Lond. viii, p. 199, t. 5, f. 10. Hyalina spurca WOLLASTON, Test. Atl. 

 p. 534. Patula spurca SMITH, P. Z. S. 1892, p. 260, t. 21, f. 1, la. 



In some specimens the spire is more elevated than in others, and 

 occasionally the apex is scarcely raised above the last whorl. The 

 majority of the examples examined have to a great extent lost their 

 original color and are now of a uniform whitish tint ; but a few 

 from Sugar loaf Ridge, which have the appearance of live shells, 

 look of a pale reddish color to the naked eye, but when viewed 

 under a lens it is seen that they are variegated with irregular radi- 

 ating blotches of red and white intermingled. The lines of growth 

 are distinct, finely hair-like, arcuate and oblique on the upper sur- 

 face and gently undulating on the body whorl. The umbilicus is 

 deep but narrow, equalling about one-fifth the diameter of the base. 

 (Smith.') 



P. DIAN.E Pfeiffer. PL 36, figs. 3, 4, 5. 



Shell umbilicated, depressed, discoidal, rather thin, closely stri- 

 ated and irregularly varicose, slightly shining, black-brown ; spire 

 plane; whorls 4, convex; the last not descending, subdepressed- 

 rotund ; umbilicus one-fourth the diameter. Aperture suboblique, 

 lunate-circular; peristome simple, straight, margins converging, the 

 columella a little dilated above. Alt. 2, greater diam. 41, lesser 4 

 mill. (P/r.) 



Diana's Peak, St. Helena (living). 



Helix diance PFR., Mai. Bl. 1856, p. 206; Monogr. iv, p. 103. 

 Hyalina diance WOLL., Test. Atl. p. 534. Patula diance SMITH, P. 

 Z. S. 1892, p. 261, t. 21, f. 2, 26. 



Closely allied to P. spurca. 



P. PERSOLUTA Smith. PL 36, figs. 9, 10, 11. 



Shell minute, broadly and openly umbilicated, discoidal, planor- 

 biform, pale reddish (?) ; whorls 3->, very convex, separated by a 

 very deep suture, rather rapidly increasing, striated with oblique 

 growth lines; the last whorl tube-shaped, rounded, free from the 

 preceding and descending in front; aperture subcircular, the colu- 

 mellar margin slightly flattened. Alt. 2, greater diam. 3J, lesser 

 2! mill. (Sm.) 



Side Path, St. Helena (extinct). 



P. persoluta E. A. SMITH, P. Z. S. 1892, p. 261, t. 21, f. 3-36. 



