EXPLANATION OF PLATES. 637 



Plate 46. 

 Balanus crenatus Bruguiere. 



All from Cape May, N. J. C. Le Roy Wheeler. Upper right and lower 

 right figures show specimens growing on Piilgnr canalicidatum, two small 

 upper figures to left specimens on brachiopods known as Crepidula, large me- 

 dian left figure specimen of Mactra solidissima neatly covered, and lower left 

 figure an example of Polynescs duplicata partly covered. All are consider- 

 ably reduced. Specimens dried. 



Plate 47. 

 Balanus eburneus Gould. 



Two upper figures from five miles below Port Republic, N. J. Specimens 

 growing on oyster shells. Dr. H. A. Pilsbry. 



Lower figure an old hat nearly covered with examples, and found at Sea 

 Isle City, N. J. Clarence Test. 



These figures well reduced. Specimens dried. 



Plate 48. 

 Chelonobia testudinaria (Linnaeus). 



Two lower and left figure second from top, all from Point Pleasant, N. J. 

 Witmer Stone. 



Left figure, second from bottom, without locality, received from R. Swift. 



LIppermost left figure, from example obtained at Progreso, Yucatan. 

 1980. Academy Expedition. 



Remaining upper figures, eight in number, to right, from the Pacific Ocean, 

 North America, received from Dr. T. B. Wilson. 



All these figures reduced. Specimens dried. 



Plate 49. 

 Coronula diadema (Linngeus). 



Two lower figures, ventral views. Spitzbergen. M. Sommerville. 



Three upper figures, left and right show lateral views and middle dorsal 

 view. Without locality. R. Swift. 



Lower of two middle right figures, dorsal view. Pacific Ocean. J. Pierce. 



Remaining three figures from examples without data, of which upper two 

 dorsal views and lower to left ventral view. 



All figures on this plate reduced. Specimens dried. 



Plate 50. 

 Caprella acutifrons Latreille. 



Middle figure, dorsal view, copied from Paulmier (Bull. N. Y. State Mus., 

 No. 91, June, 1905, fig. 38 on p. 168). 



Figure to right, lateral view, copied from Bate (Cat. Amphipod Crust. 

 Brit. Mus., 1862. PI. 56, fig. 8. female). 



Left figure, lateral view, copied from Bate (L. c, PI. 56, fig. 8, male). 



