520 



We cannot recognize any specific difference between N. inter- 

 media and N. globosa, and both are so peculiarly formed as to 

 present the idea of N. latissima, with the expansions only com- 

 mencing their development. 



On stones in a mountain stream in the Island of Lions, Bay of 

 Monteja. Also in a rivulet at San Lucas, in the Gulf of Nocoya, 

 Central America. 



44. Neritina Guayaquilensis (pi. cxiv. f. 177), V Orbifjny. 



N. testa N. intermedia simili, sed spira exertiuscula ; labio 

 interno breviusculo, subtumido. 



Resembling N. intermedia, but more globose, and with the 

 inner lip shorter and tumid. 



Realeijos, Guayaquil. Cvmmg. 



45. Neritina punctulata (pi. cxv. f. 192), Lam., Anim. s. 

 vert, j Conch. 111. f. 21. 



N. testa subglobosa, epidermide tcnui induta, maculis subviridi- 

 bus seriebus obliquis nigro marginatis picta ; spira subcelata ; apice 

 rotundato ; apertura magna ; labio externo interne albo, margine 

 superne lluctuato, ad suturam extenso, canalem form ante ; labio 

 interno subplanulato, fulvo, superne angusto, margine in medio 

 dentato. 



Rather globose, with white spots, showing greenish through the 

 thin epidermis, and margined with black lines; spire nearly 

 hidden; apex of the shell rounded; aperture large; outer lip 

 white within, with the margin curved at the extended upper part, 

 so as to form a canal ; inner lip nearly flat, yellowish, narrow at 

 the upper part, broad below, dentated at the centre of the edge. 



Jamaica ; on stones in small rivers. P. II. Gosse. 



46. Neiutina Afra (pi. cxv. f. 193), Sowerby, Conch. 111. 

 f. 39. N. Africana, Recluz, Revue Zoologique. 



N. testa N. punctulatce simili, sed anfractu ultimo minori, apice 

 angustata. 



This species presents the idea of a specimen of N. punctulata 

 taken in a soft state and pinched up at the apex, so as to narrow 

 the upper part of the aperture, and make the body-whorl less in 

 proportion to it. 



Fernando Po. Frazer. 



