FAMILY BALANIDjE — BALANUS. 251 



Occurs imbedded in the skin of whales. Several years since, I observed them attached 

 to a whale caught off Sandyhook and exhibited in this city. Among them I noticed what I 

 conceived to be C. balcenaris. 



(EXTRA-LIMITAL.) 



C. denticulata. (Say, Ac. Sc. Vol. 2, p. 325. Astrolepas, Gray.) Shell depressed-conic; base 

 oval : height equal to about one-third of the base. Valves and interstices smooth ; the anterior 

 valve largest, posterior smallest. Opercle transversely striate. Posterior pair of valves with a 

 submarginal impressed line, from which to the edge are drawn three or four other impressed lines. 

 Attached to Limulus polyphemus. 



GENUS BALANUS. Bruguieres. 



Shell conical, occasionally elongated, composed of six valves. Opercle pyramidal, slightly 

 oblique, of four triangular valves, of which the two smallest are spoon-shaped. 



Balanus miser. 



PLATE XXXIV. FIG. 318. 



(STATE COLLECTION.) 



Balanus miser. Lam. An. sans vert. Vol. 2, p. 491. 



B. id. RossEL, Essex Jour. Nat. Hist. Vol. 1, p. 48. 



Description. Shell gregarious, much broader than high, conic-truncate, oblique on one 

 side, more vertical and slightly beaked on the other side. In the young shells, they are 

 slightly festooned at the base ; in the full grown specimens, as exhibited in the plate, the 

 sides towards the base are coarsely rugose : opercular valves transversely striated ; the in- 

 ferior valves most projecting. 



Color, soiled greenish or whitish. 



Height, 0-05 - 0-25. Diameter of base, 0'15 - 0*5. 



The young are brownish or whitish. It is the most common species on our shores, attached 

 to stones and logs between high and low water. If not identical with the common ovularis 

 of Gould, it is a very closely allied species. 



32* 



