176 J^anama Shells. littobinid^. 



This species is probably rare. With much labor -we obtained 

 H specimens in the mangrove 1,hicket, which is about two 

 miles east of Panama. Someof them. are fullyiequalinisizeand 

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

 largest is 1.55 inch long and 1.15 inch wide. 



241. liittorina puncticulata. 



/Synonymy. 



imtorina punctuiulata Phil. Abbild. H. pi. 4. f. 15. March 1847. 



Station. — On fragments of rocks at higb water mark. 



Habitat. — ^Eeal Llejos ; Philippi. 



Taboga ; 0. B. A. I 

 80 specimens were collected. 



242. Xittorina raria. 



Synonymy. 



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



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



Phil. Abbild. n. 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, Ousma (Peru) ; Philippi. 

 "Chiloe (?) nach einer brieflichen Angabe von 



Herrn Petit;" Philippi. 

 Peru; Jay. 

 Panama ; C. B. A. ! 

 800 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 



