1871.] F. StoKezka— Notes on Terrestrial Moll meet. 231 



cause it includes only an amatorial, not a true copulative, organ. 

 "When speaking of the mantle (see pi. xvii, fig 2,) I have termed, 

 acccprding to Semper, the two portions of the mantle, which on 

 either side of the pulmonary opening are more or less reflected over 

 portions of the peristome, the right and left shell-lobes, and those 

 which cover the back of the animal the dorsal-lobes. Strictly 

 speaking, there are only two mantle lobes present, one right and 

 one left, but of each the superior portions often cover parts of 

 the shell, and these are called shell-lobes ; they besides often possess 

 separate appendages. 



The foot is below either grooved in the middle or not, but there 

 is always a more or less wide muscular area present, which is 

 separated from the margins of the sole by fine lines. 



Genus. Eotula, Albers. 



This name was proposed by Albers (Helic, edit. 2nd, p. 62,) for 

 Helix detecta, Fer., which species represents a type of subdiscoid 

 Zonitid^:, possessing a thin shell with numerous whorls, these being 

 narrow, flattened and sculptured above : the last with more or less inflated, 

 smooth, or finely striated polished base ; narrowly, or not, perforated; 

 carinated at the periphery ; apertural margins simple, attenuated, some- 

 times internally slightly thickened. Thus characterized llotula would 

 include a large group of Zonitid2e from India and the adjacent 

 islands. I may mention serrula and pansa, Bens., indica and 

 Shiplayi, Pf., Kundaensis, Blf., &c. "When the last whorl is more 

 rounded, as in ornatissima, Bens., the form would appear to pass 

 into Semper's Euplecta, and when the upper sculptured surface 

 becomes smoother, as in tcxtrina, Bens., the shells would appear to 

 form a transition towards Macrochlamys. 



If the external characters of the shells be alone consulted, I 

 do not think that great difficulty can be experienced in classi- 

 fying the species under this genus, and, unless disproved by the 

 examination of the animal of the type, R. detecta, Fer., the genus 

 may stand as indicated above. If this be admitted, and considering 

 Helix anceps of Gould, II Massoni, Behn, and another unnamed 

 species from Penang,— of all of which I have examined live 

 animals,— as belonging to llotula, I may add the following 



