176 Panama Shells. LITTORINID^E. 



This species is probably rare. With much labor we obtained 

 11 specimens in the mangrove thicket, which is about two 

 miles east of Panama. Some of them are fully equal in size and 

 beauty to the specimen which is figured by Dr. Philippi. The 

 largest is 1.55 inch long and 1.15 inch wide. 



241. Littorina puncticiilata. 



Synonymy. 



Littorina puncticulata Phil. Abbild. II. pi. 4. f. 15. March 1847. 



Station. On fragments of rocks at high water mark. 



Habitat. Eeal Llejos ; Philippi. 



Taboga ; C. B. A. ! 

 80 specimens were collected. 



242. Uttorina rnria. 



Synonymy. 



Littorina varia Sowb. Gen. No. 37. f. 4. 1824. 



Reeve Syst. Conch, pi. 222. f. 4. 1842. 



Phil. Abbild. II. PI. 1. f. 2, 3. Aug. 1846. 



Station. This species was found on the trunks and branches 

 of small trees which were growing between half tide and high 

 water levels. 



Habitat. Panama ; Sowerby. 



Panama, Guayaquil, Cusma (Peru) ; Philippi. 



" Chiloe (?) nach einer brieflichen Angabe von 



Herrn Petit;" Philippi. 

 Peru; Jay. 

 Panama ; C. B. A. ! 

 300 specimens were collected. 



Since this species inhabits the middle regions of the marine 

 zoological province on the west side of tropical America, it is 

 extremely improbable that it should also inhabit a region in so 



