CORILLA.. PLKCTOPYLIS. 



69 



and lower folds. In lig. 20 two immature specimens are de- 

 lineated of which a-e exhihit one with four whorls completed, 

 having live immature palatal plates. In fig. 26 e and / the daggei 

 indicates the place where the barriers occur, m the former at the 

 end of the fourth whorl and in the latter where only 3| whor s 

 have been completed. I also possess one specimen of 2| whorls 

 which is provided with a set of barriers at the end of 2^ wliorls, 

 distant about | whorl from the nepionic shell. Except in size 

 these barriers do not differ from those in the other immature 

 shells. 



76. Gorilla coUetti, S)/l-es. 



Gorilla colletti, Svkes. Proc. Malac. Soc. London, ii, 1897, p. 233, 

 pi. 10, tigs, ii-is. 



Oriqinal description:— ''Shaiie strongly recalling that of C.rivoUi, 

 but the new species is much smaller in size. Sculpture also 

 similar in nature, but finer and more closely set. The mouth in 

 the present species not so much contracted and not quite so 

 descending ; the lip not nearly so reflexed and thickened. The 

 palatal and parietal lamellae are the same in number in both 

 species, but in C. collmi the former approach more nearly to the 

 iip especially the upper two. Of the parietal lamellae, the upper 

 and lower are more nearly parallel, and not so convergent, while 

 the middle one is much shorter than in C. rivohi, and does not 

 enter so far into the shell. 



" Long. 21-21-25, lat. 14-15-5, alt. 6-5-75 mm. {>SifL-es.) 



Hab. Ceylon : Balangoda (Collett). 



Genus PLECTOPYLIS, Benson. 



Plectopyli-^ (section of Helix), Benson, A. iM. N. H. ser 3, v, 1860, 

 p -yU; Stoliczka, J. A. S. B. xl, 1871, p. 217: Pilsbry, Man. 

 Conch, sor. 2, ix, 1894, p. 143 ; Gude, Science Gossip N. svi, 

 1899, pp. 147, 174 ; Godwin-Austen, Moll. India, u, 1907, p. -Ul. 



Type, Helix achatina (Grray), Pfeiffer [bensoni, Gude]. 



Ramie. N.E. ludia, Burma, Tonkin, South and Central China, 

 and Loo Choo Archipelago. 



''Shell depressed, ivith flat or low-conical spire and large 

 w»i6i7ic«s, destral or sinistral; solid or thin, the upper surface 

 (generally sculptured with spiral lines, hirsute in the young. 

 Aperture half-round or lunate, oblique, the hp reflexed, its end 

 o-enerally joined by an elevated parietal callus, which usually 

 bears an entering lamella. Interior of the last whorl ohstructed 

 hij a barrier composed of a transverse plate or pUtes on the parutat 

 ivall, and several transverse or longitudinal denticles or plates on 

 the outer wall. „ , 



" Foot short, rarely equalling in length the diameter ot tne 



