262 ME. E. A. SMITH ON THE 



shells in their present state are white, with reddish-brown streaks 

 between the plicae ; these being more or less interrupted at the 

 middle, form two series of oblong spots, one at the upper part of 

 the whorls and one beneath. Upon the last volution the lower 

 series are prolonged into wavy streaks extending to the base. 

 The striae are coarser upon the upper whorls than upon the last 

 three or four, and, cutting across the plicae, give the latter a nodu- 

 lous appearance. 



12. Melania stjbsimilis, n. sp. (Plate Y. fig. 13.) 



Shell elongate, turreted, yellow, streaked and dotted with red. 

 Whorls about 10, shallowly excavated at the upper part, and 

 slightly convex beneath the depression, obliquely plicated and 

 spirally grooved. Plicae about 12 in number upon a whorl, fre- 

 quently almost obsolete upon the last, most conspicuous near the 

 middle, and scarcely attaining to the suture either above or below ; 

 upon the upper whorls they are decidedly granose, through 

 being cut across by the spiral grooves. TJpon the last and pen- 

 ultimate volutions the nodules are one or two in number upon the 

 plicae ; but further up the spire they are three or four ; the 

 uppermost ones mark the extent of the shallow depression, and 

 stand out a paler colour than the rest o£ the surface. Last whorl 

 grooved and ridged throughout. Ridges about 14 in number, 

 those near the middle rather the coarsest. Aperture ovate, about 

 one third the length of the shell, exhibiting the spotting of the 

 exterior. Columella arcuate. 



Length 25 millim., diam. 8. 



Sab. Australia {J. Gould.) 



M. balonnensis is the nearest ally of the present species. The 

 latter is more elongated and narrower, has a less decided angula- 

 tion near the middle of the whorls, and a general smoother appear- 

 ance owing to the transverse grooves being shallower. The 

 painting of the two species is very similar ; but the epidermis of 

 that described by Conrad, judging from the series in the Museum, 

 is not so yellow as that which clothes [the eighty specimens of 

 M. subsimilis. 



Grenus Vivipara. 



Two peculiarities are constant in all the Australian species of 

 this genus. Every example that has come under my examination 

 exhibits spiral sculpture ; and in none of them are colour-bands 



