PELONAIA GLABRA. 



147 



[Pelonaia Isevis BRONN Tliier-Reichs, III, I (1861), pi. xiii, 

 ff. 20, 21.] 



Bod 11 "not nearly so much elongated as the last. 

 Test greenish-yellow, smooth, pilose' [Forbes fy GooJ- 

 .*//]. Thin and diaphanous like parchment. 



Hob. - - Seven fathoms water, in mud (Goodsir}. 

 [Nine fathoms (Forbes). ~\ 



ENGLAND. [Helford River, Falmouth, Cornwall, in 

 trawl refuse (Cocks, 1849).] 



SCOTLAND. [Firth of Clyde (Forbes, 1850; Norman, 

 1857).] Rothsay Bay, Bute (Goodsir, 1840). 



First record. -'Forbes & Goodsir (1840) ; coll. Good- 

 sir. 



FIG. 82. 



FIG. 83. 



FIG. 82. Pelonaia corrugata. FIG. 83. Pelonaia glabra. Both natural 

 size, a, Oral orifice [branchial] ; b, anal orifice [atrial]. FIG. 84. 

 Anatomy of P. glabra ; three times natviral size. " a, a bristle in- 

 serted into the respiratory sac through the oral orifice ; b, a bristle 

 inserted in the mantle-cavity through the anal orifice of the test ; c, 

 ganglion with the nerves proceeding from it ; d, the shelf or trans- 

 verse ridge in the interior of the test and mantle ; e, branchial vein 

 inclosed in a serpentine band . . . ; f, branchial artery ; g, generative 

 organ of the left side, with a bristle inserted into its duct ; h, the 

 stomach ; i, anus ; lik, cut edge of the test." (Forbes Sf Goodsir in 

 Edinb. new Philos. Journ. xxxi, p. 34, pi. i, ff. 1-3.) 



This species differs from the last in the characters 

 above given, and in some minute anatomical details 

 pointed out by Professor Goodsir in his excellent 

 paper on the anatomy of the genus. It has not come 

 under our observation. 



