48 IIIMA. 



X. PERTTREMTA, Teiiisoii-Woods. PI. IS. lio-. 57]. 

 Milky white, siiljpollucid, sliiniiig. Ijenoth. 7 mill. 



Port Jackson,, Australia. 

 X. coxcENTRiCA, Mari-at. PI. 15, fio-. -260. 



(xi-cyishjAvith two brown bands ; lioaded at the siitures, closely 

 ribbed, impressed with revolvino' lines at the base. 



Length . -65 inch. 



Habitat unknown. 



A doubtful species founded upon a iit>ure in Keeve's Iconica 

 intended for N. conrinim, Powis — whieii it is not. 



X. RissoiDES, Marrat. PI. 1;"). fig. 253. 



Shell white. Length, "oo ineli. 



Habitat tinknoum. 



Much more slender than the typical N. paupera, yet I doubt 

 its distinctness. I have before me a single specimen which is 

 just intermediate between the two forms. 



X. EXiMiA, H. Adams. 1^1. 15. fig-. 257. 



Cancellated by very close, small longitudinal and revolving- 

 lines ; light yellowisii brown, with tliree jiale brown revolving- 

 bands. Leng-lii, S mill. 



JVew Hebrides ; Viti Islands —A. Garrett. 



Still more pupiform than N. paupera, and smaller, with much 

 finer sculpture. N. pusilla, Marrat, an unfigured species from 

 Singapore, is prol)ably (judging- from the descriptif»n) identical. 



X. coNCiNNA. Powis, PI. 15, figs. 25(;, 258-251). 



CMosely cancellated, with an imi)ressed line at the suture, 

 dividing otf a single row of granules. Length, •05-"8 inch. 



Palynesia ; Australia. 



In form, sculpture and coloring like the preceding- species, but 

 dirtering- greatly in bulk. N. crehrUint'ato , lIoml)r. and Jacq. 

 (tig. 258), and pi-ol»ably N, pidcherrima, Marrat (lig, 259)', are 

 synonyms. . ^ 



X. TNTERLIRATA, E. A. Smith. PI. 15, fig. 261. 



With spiral lira? in the interstices ot the longitudinal riblets. 

 Dark brown, blackish beneath the sutures. Length. (J-5 mill. 



San Christoiud. Solomon hhindn. 



