SUPPLEMENT. 199 



P. 220. C. ALBUS. N. of Hebr. 170-550 f. (C. and T.). E. 

 Labrador, 50 f. (Packard) ; Wellington Channel (Belcher) ! 



P. 221. C. MARGINATTJS. F. Selsea (A. Bell)!; Norway 

 (Sars). E. Sicily (Ph., as C. variegatus) !; Adr. (Stossich) ! 



P. 222, 1. 12 from bottom, for the North Sea" r. " Nor- 

 way". 



P. 224. C. RUBER. F. Clyde beds (Crosskey and Robert- 

 son) !; Norway (Sars and others) ! E. G. Tartary (Lischke) ! 



P. 226. C. LJSVIS. F. Pisa (Manzoni). C. ruber, Olivi, 

 and C. rubicundus, Costa. Capt. Thomas dredged in Eda 

 Sound, Orkneys, a specimen having only seven plates. 



P. 227. C. MARMOREFS. F. Norway (Sars); Labrador 

 (Packard). E. ? Holland (Herklots); not Carthagena (M'An- 

 drew, who says that perhaps 0. Icevis was intended) ; Mexico 

 (Brit. Mus.)! ; var. probably Sea of Okhotsk (Midd., as C. sub- 

 marmoreus). 



P. 229. (7. siculus, Gray. F. Selsea (A. BeU) ! 



P. 235. PATELLA. Mr. E. R. Lankester says that it is 

 very closely allied to Chiton, and has the same peculiar lami- 

 nated " crop," resembling in structure the psalterium of rumi- 

 nants. The strength of its conical shell in resisting pressure 

 from above is very great. Burns was scarcely justified in both 

 his similes of an illicit whiskey-still seized by excisemen : 



" Triumphant crushin't like a mussell 

 Or lampit shell." 



P. 237, 1. 7 from bottom, before " Lamarck " insert " Yon 

 Salisand". 



P. 238, 1. 8 from bottom, after "North" add " and South". 



P. 242, 1. 16 from top, dele " not ". 



P. 242. HELCION PELLUCIDUM. Yar. elongate. Oblong 

 and smaller. Oban (Leckenby)! The inside of shells be- 

 longing to the variety Icevis often exhibits the mark of mus- 

 cular attachment above the head in the form of a ledge : occa- 

 sionally there are two of such ledges, at intervals denoting the 

 different stages of growth. 



P. 246, 1. 5 from top, for " Mangdia" r. " Pleurotoma" , and 

 for " Amphisphyra " r. " Utriculus ". 



