SYKES : SUMATEAN CLATJSILI^. 



29 



since in this case the third is the smallest and the second and fourth 

 of equal size, while in C. ohesa they diminish gradually. I have never 

 seen C. ohesa, and the single type specimen is in the Leyden museum. 

 The type of C. cBnigmatica is in the British Museum. 



Claijsilia Melvilli, n. sp. 



Testa fusiformis, solidula, levissime striatula, fuscescens, ad 

 suturam pallidior ; anfr. S^-, convexiusculi, sutura simplice, apertura 

 ovata, peristomate reflexo, crassulo, albo, undique soluto ; lamella 

 superior valida, ad marginem attingens, lamella inferior et lamella 

 subcolumellaris debiliores, convergentes, fere ad marginem attin- 

 gentes ; plicae palatales 3 longse, suprema (principalis) maxima. 

 Alt. 22 mm. ; lat. antepen. 6, pen. 5i mm. ; alt. apert. 6, lat. 

 4^ mm. Hah. — " A few miles north of Point Lampong, S. Sumatra." 



Claunilia MelviUi, n.sp. 



This shell was given to me by Mr. J. Cosmo Melvill, for whom it 

 was collected by the late Mr. E. C. Buxton about 1873-4. I sent the 

 specimen to Dr. Boettger and he returned it with the following note : 

 "Differt a CI. ohesa v. Mts. anfr. solum 8^, penultimo ventrosiore 

 quam antepenultimo, apert. ovata, lamellis extrorsum convergentibus, 

 plicis principali et palatalibus 3 longis, nee 4." No other species but 

 C. ohesa seems to come near it. It is not unlikely that this is the shell 

 referred to by von Martens (Preuss. Exped. N. 0. Asien, Zool. Thl. 

 ii., p. 384). The type is in my collection. 



Clausilia Sumatrana v. Mts. var. vicaria n. var. 



"Differt a C. {Pseudonenia) Sumatrana v. Mts. typica, testa 

 niinore, magis nitida, anfr. 9^10^, apertura pro altitudine testae 

 minore, lamella subcolumellari et oblique intuenti inconspicua, plicis 

 palatalibus (veris) prima, secunda, tertia modicis, subaequalibus, 

 quarta et, si adest, quinta minimis. Alt. 18-20, cliam 4J-4| mm.; 

 alt. apert. 5, lat. apert. 3i-3|mm. (2 specimina)" (Boettger). 



Clausula Sumatrana, v. Mts., var. vicaria, n.v. 

 Dr. Boettger inclines at present to consider this shell only a variety 



