NERITINA. 65 



Var. spiNiFERA, (Recluz) Sowb. Fig. 14. 



Reticulated with reddish browu. It is very doubtful whether 

 this is the spuiifera of Recluz. 



Var. DoNOVANA, Recluz. Figs. 12, 13. 



With subvertical flexuous reddish or blackish strigations. 

 N. strigillata, Canefri is a synonym. 



Var. Celebensis, Mousson. 



With alternate orange and black spiral bands, the orange ground 

 with triangular black-margined yellowish spots. 



N. BREvispiNA, Lam. PI. 23, figs. 16-18 ; PL 24, figs. 19-28, 31-34. 



Rugosely plicate, and usually very irregularly subgranular, often 

 unarmed, or with a shoulder somewhat shortly spinose, yellowish 

 brown, with granules whitish, varying to darker brown or nearly 

 black, sometimes obscurely maculated or indistinctly banded, some- 

 times pinkish under the epidermis; aperture yellowish or bluish 

 white, columellar edge usually edentulous in large specimens, mi- 

 nutely faintly dentate in small ones. Diam. 1 in. 



East Indies to Central Pacific. 



A very common, widely distributed form which rejoices in an 

 extensive synonymy. It is N. corona, Linn, in part (figs. 16, 20.) 

 N. spinosa, Wood, jV. variabilis,- Jjesson, N. cardinalis, Guillou, N. 

 Montucute, Recluz, N. musiva, N. flexuosa, and N. corrugata, Hombr. 

 et Jacq., N. suhgranosa, (figs. 17, 18) and var. mutica, Sowb., N. squar- 

 rosa, Recluz, (figs. 25, 26), N. ruida, Mousson, N. squamosa (Reel.) 

 Sowb., iV. Pritchardi, Dohrn (fig. 23), — with which may be 

 united N. aspera, Phil., N. deltoldea, Garrett and var. Vitiana, 

 Mousson, N. rugata, Recluz (figs. 27, 28), and its var. monilifera. 

 Marts., in which granules tend to unite into longitudinal plicee. 



Var. ANGULOSA, Recluz. Figs. 21, 22. 



Irregularly longitudinally plicate, blackish olivaceous, usually 

 Avith minute yellowish spots, which are sometimes black margined, 

 sometimes replaced by short black lines, spines scarcely developed 

 on the' shoulder. 



Typically, this form seems very distinct, but it passes into brevis- 

 pina by intermediates; one of these is N. obscurata, Reel, others are 

 N. discors, Mart. (fig. 24), and N. ruginosa, Reel. (figs. 31, 32), — 

 of which N. aspersa, Reel. (fig. 33), N. humerosa, Mousson N. sub- 

 rugata, Baird. (fig. 34) are synonyms. 



