372 Quarterly Journal of ConcJioIogy. 



BIBLIOGRAPHY. 



Notes on the He!ix sepulchralis and its allies, with 

 descriptions of two new species. — ByG. French Angas, 

 C.M.Z.S., F.L.S., &c. (P.Z.S., Nov., 1877, pp. 3 and plate.) 



Mr. Angas has rendered in the3e notes good service to 

 conchology by examining the fine series of Madagascar shells in 

 the collection of Sir David Barclay, Bart., and differentiating the 4 

 distinct species that have hitherto been grouped under the name 

 of sepuIcJiralis of Ferussec. 



M. Crosse had previously indicated one as distinct, 

 under the name of subsepulchralis, differing from the true 

 sepulchralis in its smaller size, more contracted umbilicus and 

 banded periphery, the dark coloring showing also on the interior 

 of the lip, while the concentric depression and coarse plication 

 are absent. 



The two remaining forms proposed for specific rank are : — 

 Helix hova. This is the sepulchralis ^•ar. c of Reeve, and bears 

 some resemblance to the preceding species, and has three broad 

 chesnut zones on a pale ground. 



Helix sakalava. This species is known to some collectors as 

 the var. oliva-maculosa of sepulchralis and is distinguished from 

 that species by the absence of the oblique plications, the lower 

 edge of the concentric depression being bounded by a prominent 

 keel, the umbilicus being pinched and contracted and the epider- 

 mis freckled and diaphanous. 



Three varieties of this species are described : — 



Var. a. Shell white, with an olive -yellow epidermis. 



Var. b. Shell pale green, with three brown bands and 



freckled with diaphanous markings. 

 Var. c. Shell pale yellowish-olive, irregularly painted with 

 longitudinal brown flames. 



J. W. T. 



