214 SUPPLEMENT. 



BODY clear white, with a somewhat frosted appearance: 

 snout (or mention) long and narrow, deeply bilobed in front, 

 and divided down the middle: tentacles triangular, rather 

 short, with blunt tips : eyes very small, approximative, on the 

 inner base of the tentacles : foot long, squarish and double- 

 edged in front, with a slight auricle or triangular expansion 

 at each corner, and terminating behind in a rounded point. 

 Liver orange. Animal active, crawling rapidly out of the 

 water. It does not occupy the nucleus or reversed apex of 

 the shell. 



N. of Hebr., 170 and 189 f. (C. and T.). F. Pisa (Man- 

 zoni) ; Monte Mario (Rigacci) ! E. Naples (Tiberi and Ste- 

 fanis) ! 



P. 173. 0. NITIDISSIMA. F. Calabria (Tiberi)! E. G. 

 Gascony (De Folin) ! ; Naples (Acton) ! ; Nona, Dalmatia (Bru- 

 sina) ! 



P. 186. IANTHINA ROTUND ATA. Dunnet Head, Caithness 

 (Thomas) ! E. Arcachon, living (Lafont) ! ; Naples (Scacchi 

 and others) ! ; Sicily (Aradas) ! 



P. 191. Some species of Stilifer, however, are truly parasitic. 

 Prof. Semper observed them living and crawling about in the 

 stomachs of Holofhurice ; and one species was found by F. Jagor 

 within the excretory canal of H. glaberrima, its foot pene- 

 trating deeply into the fleshy walls of the canal, and the 

 shell being surrounded by a cup-like expansion of the 

 mantle. 



P. 193, 1. 3 from top, for Mangilia " r. " Pleurotoma ". 



P. 195. STILIFER TURTONI. Falmouth (Hockin) ! ; Unst, 

 40-50 f. (J. G. J.). 



P. 197, 1. 13 from top; for " Caligus" r. " Lerncea". 



P. 201. ETJLIMA POLITA. F. Upper tertiaries of Germany, 

 France, Italy, and Greece southwards to Rhodes (Homes). 



P. 203. E. INTERMEDIA. Birterbuy Bay (Walpole)! F. 

 Norway, N.W. Germany, and Italy ! E. Loffoden I., 300 f. 

 (Sars). Var. rubro-tincta, Adriatic (Stossich) ! 



P. 205. E. DISTORTA. F. Pisa Rhodes! E. Loffoden 

 I., 300 f. (Sars). fl. sinuosa, Scacchi, and E. Philipp'd, Wein- 

 kauff. This may be one of the few surviving or unaltered 



