14 



Lepas Diadema. Don. Br. Shells, ii. t, 56. f. 1.2. 



Tart. Lin. iv. p. 166. 

 Balanus Balasna. Da. Cofta. p. 251. t. 17. f. 2. 2. 2. 



B. with a fub-comprened hemifpheric fliell, with twelve 

 compartments; fix depreRecl flat and filiated tranfverfely ; 

 the others which are ahernate are prominent, with four 

 five, or fix elevated longitudinal ridges, and tranfverfe 

 flrise ; at the top is a deep cavity, funnel-fliaped, hexago- 

 nal within, at the bottom of which is the aperture : the 

 ribs are alfo furnifhed with openings at their fummit : the 

 bafe is concave, furniflied with divifions or cells in a 

 radiated manner: in live fliells this part is covered with 

 a tough coriaceous membrane. It is ufually of a dirty- 

 white colour, an inch in height, and two or three inches 

 diameter tov/ards the bafe; but commonly not half fo large. 



The animal figured by Mr. Ellis in the Philofophical 

 Tranfaciions refembles a clufler of fmall hooded ferpents, 

 ifluing from the aperture and openings on the top of the 

 ribs. 



This fpecies is rarely found in the Southern parts of 

 this Kingdom, but is often met with on the (horts of 

 Scotland and the iflands contiguous. 



It appears to inhabit fome fpecies of Whale, by wliicli 

 it is faid that the natives of the Northern parts diilinguilh 

 one kind from the reft. 



Whether this is really diflinft fiom the Balanus Ba- 

 Icenaris, which is found adhering to the perioral wrinkles 

 vof the Balizna Boops is doubtful. GEN. 



