NERITINA 



Species 6. (Fig. a, b, Mus. Cuming.) 

 Neritina Knokri. Ner. tedd ovatd, solidkiscula, spmi 

 plano-mpressd, p/ir.s minus erosd, anfraclibiis subaii- 

 gustk, concentrice slrlatis, labro miperne subauricidalo, 

 area columellarl lata, ampld; liUesce)ite-olivaced, vu- 

 dato-nigro fasciatim variegatd, labro intus aurautio- 

 rufo, area columellari nigricante-caruled. 

 Knorr's Neritina. Shell ovate, rather solid, spire 

 flatly impressed, more or less eroded, whorls rather 

 narrow, coucentrically striated, lip slightly auricii- 

 lated at the u]iper part, columellar area broad, flat ; 

 yellowish-olive, variegated with bands of black waves, 

 lip orange-red within, columellar area blackish-bluc. 

 Eecluz, Eevue Zool. Soc. Cuvierienne, ISil, p. 274. 

 Hab. Madagascar. 



Distinguished as in N. jmlligera by the charactcri.stic 

 smoky blue-black colour of the columellar area and orange- 

 red interior, but less expanded in form. 



Species 7. (.Fig. a, b, Mu.s. Cuming.) 



Neritina cornea. Ner. tesld ovatd, spird mbexnertn, 

 aiifractibns convexis, spiraliter superJicialUer sulcatis, 

 ared columellari snbangustd ; nigrd, sordide luteo ma- 

 culatd et fmciatd, ared columellari superne i/ifci/se 

 nigrd, niteiite. 



The hoeny Neritina. Shell ovate, spire slightly ex- 

 serted, whorls convex, spirally superficially grooved, 

 columellar area rather narrow ; black, banded and 

 sprinkled with dark yellowish spots, columellar area 

 intensely black at the upper part, shining. 



Nerita cornea, LinniEus, Syst. Nat. (12th edit.) p. 1258. 

 Neritina amphibia, Lesson. 



Ilab. Philippine Islands. 



This characteristic dull orange-blotched species was 



found by Mr. Cuming in the above-named locality, 



eighteen feet high upon Palms, a quarter of a mile from 



any river. 



Species 8. (Fig. a, b, Mus. Cuming.) 



Neritina Pktitii. Ner. testa orbiculari-omitd, subglo- 



bosd, spird obtasi- planatd, anfractibus convexis, versus 



aperluram latioribus, concentrice irregulariter striatis, 



spiraliter obsolete impresso-Uneatis, aperturd expansd. 



ared col mnellari concavo-pland ; intense brunneo-nigrd, 

 labro et ared columellari intense sangitineis. 



Petit's Neritina. Shell orbicularly ovate, subglobose, 

 spire obtusely flattened, whorls convex, broader to- 

 wards the aperture, concentrically irregularly striated, 

 spirally obsoletely impressly lineated, aperture ex- 

 panded, columellar area concavely flattened; dark 

 brown-black, lip and columellar area deep blood- 

 stained. 



Eecluz, Eevue Zool. Soc. Cuvierienne, 18-il, p. 373. 



Ilab. Island of Mindanao, Philippines (on stones in a 

 deep river) ; Cuming. 



Well distinguished by its fine expanded globose form, 

 with ruddy blood-stained lip and columellar area. 



Species 9. (Fig. a, b, Mus. Cuming.) 



Neritina pulligera. Ner. tesld orbiculari-ovatd, sub- 

 (Iprcssd, spird concavo-impressd, anfractibus convexis, 

 versus aperluram latioribus, concentrice rugoso-stria- 

 tis, aperturd ctpansd, labro superne acute aurieulato, 

 ared columellari leviter concavd ; aperturd carules- 

 cente, labro intus aurantio-rvfo, ared colmnellari nigro- 

 cirrnled. 



Tee dusky Neritina. Shell orbicularly ovate, rather 

 depressed, spire concavely impressed, whorls convex, 

 broader towards the aperture, concentrically roughly 

 striated, aperture expanded, lip shaq)ly auriculated 

 at the upper part, cnlumellar area slightly concave ; 

 aperture bluish, lip orange-red within, columellar area 

 black-blue. 



Nerila pulligera, Linnfeus, Syst. Nat. (12th edit.) p. 

 1353. 

 Nerita rubella, Muller. 



Hab. Molucca and Philippine Islands. 



This fine species is chiefly distinguished by its broad 

 openly expanded aperture, and the peculiarity of colouring 

 noted in speaking of N. Knorri. 



Species 10. (Fig. ,/, b, Mus. Cuming.) 



Neritina subsulcata. Ner. testd suboblongo-ovatd, sub- 

 ■oentricosd, spird obtusd, anfractibus superne concavi- 

 usculis, sulcatis, sulcis fere obsoletis, ared colmnellari 



