206 Panama Shells. NEJRITID.E. 



soc. Neritina Giiayaquilensis. 



Synonymy. 



Neritina Guayaquilensis Sowb. Thes. Conch, p. 520. 



No. 44. pi. 114. f. 177. 1849. 



This may, according to Becluz, be identical with N. inter- 

 media Sowb. It is certainly identical with shells which have 

 been distributed by Mr. Cuming and by Mr. Petit under the 

 latter name. Mr. Sowerby's figures, however, seem to repre- 

 sent two species. 



Station. This shell was found a little above the highest tides, 

 among sticks and leaves, in a muddy place overflowed by fresh 

 water. 



Habitat. Eeal Llejos, Guayaquil ; Cuming ! Sowerby. 

 Panama ; C. B. A. ! 



Two miles east of Panama we collected 90 specimens in vari- 

 ous stages of growth. 



307. Neritina picta. 



Synonymy. 



Neritina picta (uon Hsening) Sowb. in Proc. Zool. Soc. 



Lond. p. 201. Dec. 1832. 



Desh. in Lam. An. sans Vert. VIII. 588. 



No. 40. 1838. 



- Sowb. Conch. 111. No. 35. pi. 86. f. 1. 1841. 



Desh. in Lam. An. sans Vert. III. Pt. 2. 



p. 479. No. 40. (Ed. tert.) 1844. 



Thes. Conch, p. 530. pi. 116. f. 267-9. 1849. 



Station. On a mud bank partially overflowed with fresh 

 water ; Cuming! Sowerby ; " Dans les eaux douces ; Cuming!" 

 Deshayes. On sticks and stones, in a grove of trees, a little 

 above half- tide level: also in dirty places on rocks at or a 

 little below half tide level. According to our observations it 

 is strictly marine. 



Habitat. Panama ; Cuming ! Sowerby. 

 Panama ; Recluz : also Jay. 



