CIRRHOPObA. 439 



M. Delamarck, under the name of CoRONULiE, separates the very 

 wide species, where the parietes of the cone are occupied by cells 

 so large that they resemble chambers(l); and under that of 



TuBiciNELLiE, those in which the tubular portion is elevated, 

 narrower near the l)ase, and divided into annuli, which mark its 

 growth(2). 



There are some species of these last two subgenera, which affix 

 themselves to the skin of the Balaenae, and even penetrate into their 

 blubber. 



To the preceding subgenera must be added the 



DiADEMA, Ranz. 



Where the tubular portion"is almost spherical, and which has but 

 two small valves almost hidden in the membrane which closes the 

 operculum. The opercular valves would not effectually close the 

 orifice without the membrane vs'hich unites them. 



They also live on the Balaenae, and Otiones are frequently observed 

 attached to their surface(3). 



(1) Lepas halamaris, L., Chemn., VIII, xcix, 845, 846;--Z. iestudinanus, lb., 

 847, 848, which attaches itself to the shell of Tortoises. 



(2) The Tubicinella, lj!xm., Ann. duMus., I, xxx, 1, 2. 



(3) Lepas diadema, Chemn., VIII, xcix, 843, 844. 



