36 NERITINA. 



The synonyms are JV. Siiviatrensis, Sowb., X. pidchra, Sowb. (figs. 

 23, 24), N. gagates, Morch, Clithon Zelandicus, var. helvola, Mous- 

 son (not Gould). N. WalUsiarum, Recluz, is black, with inconspicu- 

 ous pellucid-white or brown dots, and is probably not distinct from 

 N. variegata; I think it likely that N. Guvieriana, Reel. (figs. 85, 

 86), should also be placed here. N. pidchra, Sowb. (figs. 23, 24), 

 was described as from Panama, Avhere it is believed no such species 

 exists. kSowerby's figure shows some reddish zones alternating with 

 olivaceous, which are not present in specimens of pidchra received 

 from Sowerby as from Panama, but of a number of specimens of 

 variegata from the Viti Islands, collected by Mr. Garrett, two have 

 this peculiar red banding. 



N. ziczAc, Sowb. PL 10, figs. 87-92 ; PL 11, figs. 100, 5. 



Striulate, shining, olivaceous or yellowish, with zigzag or undu- 

 lating radiating black stripes; aperture bluish white, columella 

 often tinged yellowish-brown. Diam. 20 mill. 



East Indies, Polynesia. 



According to the relative thickness of the stripes and interspaces 

 the pattern sometimes appears to be black on an olivaceous ground, 

 at others olivaceous on a black ground. Originally identified with 

 N. ziczac, Lam., but is not that species ; yet, as it has become well- 

 known under that name, I have not deemed it advisable to adopt 

 another for it, as Martens has done. The synonyms are N. strigil- 

 lata (Lam.), Recluz, N. aquatilis. Reeve (fig. 100), N. Jovis, Reel. 

 (fig. 5), N. ramosa, Meusch., and var. inter stitialis, Martens, in 

 which the olive color is replaced by orange brown. 



The true N. ziczac of Lam. appears to be most nearly related to 

 N. reclivata. Say. 



Var. COROMANDELIANA, Sowb. 



Olivaceous, with subtriangular black maculations. 



N. triangidaris, Meusch., and N. pulcherrima and N. insignis, 

 Mousson, are synonyms. Martens has adopted this varietal name 

 for the species. 



Var. SERKULATA, Recluz. 



Black, with numerous small olivaceous spots. 



N. gidtxdata, Mouss., and var. xanthostigma, Martens, are syno- 

 nyms. 



