MELANIIDiE. 253 



subvar. 



6 Assam ; ex c. Dr. F. Stoliczka. 



7 Bbootan ; ex c. Dr. Stoliczka. 



5 Teria Ghat ; ex c. Dr. F. Stoliczka. 



subvar. subspinosa. 



5 Tank opposite Bengal Club, Calcutta ; coll. G. Nevill, Esq. 



var. infracostata. 



Melania infracostata, Momson, Moll., Java, 1849, pi. 10, fig. 3. 



3 Java ; coll. Baron F. von Richthofen. 



Unfortunately not adult. Two are the young of a form 

 resembling that represented in Mousson's Moll., Java, pi. 10, 

 fig. 4 [as " M. varicosa, Troschel "], — the whorls having longi- 

 tudinal, distant ribs, on one specimen ; these are quite obsolete on 

 the last whorl, which, however, has a few spiral striae below the 

 suture ; the third specimen shows similar longitudinal ribbing 

 on the upper whorls, but the last whorl is spirally decussately 

 striated, exactly as in the above-quoted figure of Mousson. 



var. subvaricosa, nov. 



14 Arakan and Pegu [?] ; ex c. Dr. F. Stoliczka. 



Long. 65J, diam. 24 mil. 



Reeve's fig. 10 A, " M. corrugata, Lamarck, India, &c.," may, 

 perhaps, represent this form, though it has the semi-nodulose 

 sculpture a little more developed. M. Brot's pi. 10, fig. la, 

 is close, but doubtfully identical ; unfortunately, as in many 

 other instances, he does not record the exact locality. The 

 present form is more decollate, the ribs are straighter, a trifle 

 further apart and more developed. The only figure that well 

 represents it is that of the Voy. Bonite, pi. 31, figs. 11-12, la 

 " Melania indienne " from the Ganges, = Melania varicosa, 

 Troschel, in text, 1. c, not M. indica, Soul., as stated by Brot, 

 a name I cannot find in the Voy. Bonite. There seems to be a 

 gradual transition to the M. episcopalis, Lea, which lives in the 

 same neighbourhood. 



10 Near Sibsagar ; coll. S. E. Peal, Esq. 



With sculpture not unlike that of M. infracostata, Mousson. 

 It is, I think, the form figured by Brot, pi. 10, fig. Ic. 



10 Near Sibsagar, Namtsik River, and Samaguting ; coll. S. E. Peal, Esq. 



