ALECTRION. 



2'.> 



This species is, tyi)i(!:illy, readily (listin<;uislie(l IVoin N. Iiir/n, 

 hut appears to approach the hitter througli varieties. Tiie 

 oldest name given to it is possibly N. hepatica^ Mont., who fig- 

 ured a similar species in error as British, but it is well known as 

 monile, and no useful purpose will be subserved in changing its 

 name. N. lachrymosa^ Reeve (fig. 62) and N. pauperata, C^uoy 

 = N. bullata, Marr. (fig. 61), are synonyms, and N. Jacksoniana., 

 Quby (figs. 63, 64) is a dw^'irf race, from Australia — a well- 

 marked variety. N. muvronata, A. Ad. (fig. 67), is a variety in 

 which the ribs are partially separated into granules, and N. r//.^- 

 iorta, A. Ad. (fig. 68), is a monstrosity, apparently of this 

 species. N. corticata., A. Ad. (fig. 66), appears to = var. Jack- 

 soniana, as does also N. acnticotstata, Montr, (fig. 65), and N. 

 Tasmanica, Woods (unfigured). 



N. OBESA, G. and H. Nevill. 



Shell thick, shining ; brown indistinctly and minutely mottled 

 with white, irregularly stained near the suture with a darker 

 shade of brown ; two rows of more or less granulose ridges 

 immediatel}' beneath the suture, columella with a moderately 

 large, white callosity, slightly rugose, aperture ridged near its 



margin. Length, 22 mill. 



JKutch. 

 Yar. Ceylonica, G. and H. Nevill. 



More acuminate, less globose, suture more distinct ; longi- 

 tudinal ribs on the antepenultimate w horl more or less obsolete. 



Length, 19 mill. 



Ceylon and Penang. 



Has the coloration but not the fragility of N. mutabilis, differ- 

 ing also in being sculptured. Thickness, sculpture, and particu- 

 larly the double row of granules beneath the suture indicate 

 intimate relationship with A^. monile. 



N. scALARis, A. Ad. PI. 9, figs. 69, 10. 



Pale yellowish, oliscurely banded with reddish brown. 

 Length, 1*8 inches. 



Isle of Corrigidor, Philippines, in coarse sand at seven 



fathoms. — Cuming. 

 Appears to partake of the characters of N. monile and N. 

 papilloma. N. crenulata, Kiener, not Brug. (fig. 70), and N. cren- 

 ellifera, A. Ad. (fig. 75), seem to be the same species. 



