526 



Like N. corona (Sp. 55), but smooth. 

 Philippines ; on stones in small streams. Cuming. 



63. Neritina spinifera (pi. ex. f. 53, 54), Recluz, Revue 

 Zoologique, 1842, p. 183. 



N. testa N. corona simih, sed laevigata, oblique subelongata ; 

 spira subconica ; colore rubescente, maculis albis trigonis seriatim 

 oblique picta. 



Smooth, and more oblique, with the spire more elevated, than in 

 N. corona (Sp. 55). The spines are thinner. The painting con- 

 sists of white angulated spots in obliquely crossed rows on an ob- 

 scurely reddish ground. 



Philippines. Cuming. 



64. Neritina Donovana (pi. ex. f. 39, 40), Recluz, MS. 



N. testa N. corona simdi, sed laevigata, longitudinaliter sub- 

 ovali, spira elevatiuscula ; apertura superne magis angulata ; colu- 

 mella antice unisulcata ; colore rubescente, maculis albis trigonis 

 seriatim positis, seu viridi, lineis undulatis longitudinalibus. 



Smooth, and with a more conical spire than N. corona (Sp. 55), 

 with the aperture angulated at the lower part ; distinguished from 

 N. spinifera (Sp. 63) by the latter character, and by a small semi- 

 circular groove at the lower part of the columella. 



Island of Guimaras ; on stones in a small rivulet. Cuming. 



65. Neritina interrupta (pi. cix. f. 11, 12), Recluz, MS. 



N. testa globoso-subquadrata, pallide lutea, laevigata, lineis 

 viridibus interruptis picta ; apice obtuse conico ; anfractibus tribus, 

 superne oblique ad spiram elevatis ; apertura obliqua, mediocri ; 

 labio externo superne oblique extenso, inferne rotundato ; colu- 

 mella angusta, complanata, superne callosa; margine in medio 

 emarginato, obtuse unidentato, et minute crenulato. Variat fasciis 

 luteis duabus. 



Of a globose, but slightly quadrate form, smooth, light yellowish, 

 with green, interrupted, close lines ; apex rather conical ; aperture 

 of middle size, with the columella rather narrow, flattish, but 

 callous near the upper part; outer lip thin, raised obliquely 

 towards the spire. I should not be surprised to see specimens of 

 this with spines, as it has much of the character of the spiniferous 

 species. 



Island of Luzon ; on stones in a rapid river. Cuming. 



