406 On the Land Shells of Bourbon. [No. 4, 



10. Nanina (Macrochlamys) Geoffreyi, H. Ad. 

 Proc. Zool. Soc, 1868, p. 289. 



In the original description, there is unfortunately an error in 

 the printing of a note from myself ; it should be " the animal is 

 yellow and black and resembles that of i\ r . nitella, that of JV. 

 virginea is of a uniform dark grey, almost black." 



Animal provided with a mucous gland, tail truncated ; tentacles 

 black, the black continued a short distance beyond their bases ; 

 neck yellowish-grey, slightly mottled with black, the hinder part of 

 the animal yellow, mottled on the sides with black, bordered with 

 a yellow margin ; sole of foot yellow. It closely resembles the 

 animal of U. nitella, as described by myself, Zool. Soc. Proc. 1868, 

 p. 258, the shell, however, is very different, being not nearly so 

 depressed, &c. ; it is more like H. proletan'a, M o r 1 1., but the last 

 whorl is not carinated, &c. It is abundant at Salazie under dead 

 leaves, stones, &c, in damp woods. 



11. Naxixa (Macrociilauys) Maillardi, Desh., Moll, do la 

 Beun. p. 86. 



I procured two or three specimens of a shell, which I have 

 identified with this species, both at Mauritius and Bourbon;' 

 unfortunately I did not succeed in finding live specimens, or a 

 sufficiently large set of the shells, to be perfectly certain of their 

 identity. 



12. Nanixa lixopiiora, Morlt., Ser. Conch, p. 57 (? argentea 

 var.) 



I did not succeed in finding this species myself ; I consider 

 it as the most aberrant form of a small group of Mascarene shells, 

 probably all descended from a common stock at some not very 

 remote period, now constituting more or less " good species," ac- 

 cording to the individual opinion that each naturalist may have 

 formed for himself, as to what should constitute a species and what 

 a variety. I would class these species as follows : — 



A. Nanina linophora. This is the most narrowly turbinated, 

 exerted form of the group, with the strong keel visible on all 

 the whorls, it is described as coarsely striated ; it is apparently 

 very scarce. 





