MOLLUSCA OF INDIA. Ill 



A species received from Mr, E. R. Sykes, collected by Mr. 0. 

 Collett at Dumballa, Ceylon, agrees in every respect, the umbilicus 

 only being slightly less open than in the Bintenne specimens. 



Thanks to Mr. Sykes I have been able to see and draw a species 

 lately described by him as Microcystina Ufa ; this has enabled me to 

 identify as the young a minute shell taken during the rainy season 

 off the bark of a mango-tree by Mrs. Collett, of which some 

 specimens were sent; and from off the same tree among the moss I 

 found a little Pupisoma (?), and another very interesting new species 

 I describe further on. The immature shell of M. Ufa I figure on 

 Plate XCII. (figs. 2-2 c), which can be compared with similar parts 

 of the adult shell. 



MiCKOCYSTiNA LfTA, E. E. Sykos. (Plate XCII. figs. 1-1 c). 



Sykes, Proc. Malacol. Soe. of London, vol. iii. July 1898, p. 70, 

 pi. v. figs. 10, 11. 



Original description : — " Testa [fig. 1] suhperforata,glohose-conica, 

 tenuis, polita, nitidissima ; sutura bene impj'essa ; anfr. 5, lente 

 accrescentes, hrunnei, primus paUidior, fere Icpvis, reliqui microscopice 

 undique dense sptraliter striati et lineis incrementihus remotis sculpti 

 [fig. 1 «], uUimtis rotundatus ; apertura lunaia, margine columellari 

 [fig. 1 c] subrejie.vo, incrassatuJo. 



" Alt. .S-4, lat. 2 mill. 



" Hah. Ambagamuwa (CoIJett). 



" Lieut.-Col. Godwin-Austen has kindly pointed out to me that 

 the microscopic sculpture of this shell is similar to that of the 

 Microcystina of the Andaman Islands, and I have thought it best to 

 place it in that genus ; though the strongly-marked notch of that 

 group is not present, still the columella shows a trace of it. Under 

 a microscope faint traces of spiral sculpture are also seen on the 

 Helix perfucata of Benson." 



Subgenus Mickoctstis, Beck *. 

 Type M. ornatella, Beck. Pitcairn Island. 



MicEOCYSTis ■? AMB^, u. sp. (Plate XCIII. figs. 3-3 Ji.) 



Locality. Ambagamuwa, Ceylon (0. Collett). 



Shell (figs. 3, 3 a) globosely pyramidal, umbilicated ; sculpture 

 (fig. 3 h) decussate near the apex, longitudinal ribs broken up in 

 isolated papillae, on the last whorl the transverse ribbing becomes 

 the strongest, crossed by fine furrows ; colour pale sienna ; spire 

 broadly pyramidal, sides slightly convex ; apex blunt and rather flat ; 

 suture shallow ; whorls 4, moderately convex, regularly increasing, 



* This subgenus will be one of the first to be iDcluded in another part of 

 this work. Some material has already been examined ; I have a so-called 

 Microcystis from Ceylon and another from the Malay Peninsula to describe 

 in detail. 



