166 SUPPLEMENT. 



been the only writer among the ancients who did not praise 

 oysters. In his 95th Letter he asks his friend Lucilius 

 whether this very sluggish and dirt-fattened food does not 

 produce in the eater its own muddy dulness. 



P. 45. — In 1867 the annual consumption of oysters at Paris 



was calculated at 288 millions. They are sold in London all the 



year round. Why have we not a " close time," as for Salmon, 



instead of allowing a million of fry to be gulped at one mouthful? 



P. 47, 1. 4 from top, for " Sannazarius " r. " Sannazzaro." 



P. 51.— Pecten pusio. N. of Hebr., 530 f. (C. & T.). 



E. Portrush (Portlock and A. Bell). E. Cape of Good Hope 

 (Dunker) ! 



P. 53. — P. varius. E. England and Ireland. E. Chris- 

 tiansund southwards (Sars). 



P. 58. — P. Islandictjs. E. Gulf of Naples, in 50 f. ; a 

 single valve in a semifossil state, like those dredged in Shet- 

 land, and covered with the same arctic species of Spirorbis ; 

 with it was a valve of P. opercularis, in the same condition, 

 and as large as northern specimens ! E. Einmark to Bergen, 

 where it becomes dwindled, in 5-50 f. (Sars). 



P. 59.— P. operculars. N. of Hebr., 530 f. (C. & T.). 



F. England, Ireland, Scandinavia, and Italy. 



P. 62. — P. septemradiatus. 



Body whitish, tinged with neshcolour, and minutely speckled 

 with flake-white ; the colour is also diversified by blotches and 

 streaks of dark brown, orange, yellow, or greenish : mantle 

 thick, folded inwards on each side ; the margin is fringed with 

 numerous cirri or tentacles, which are closely and finely ciliated ; 

 they are of different sizes, encircled by flake-white rings, and 

 arranged in 2 or 3 rows on each side ; the outermost row con- 

 tains some of the largest size, which curl at their tips and are 

 mostly of a yellow colour ; under this row are placed the 

 " eyes " or ocelli, about 50 on each side ; these are of different 

 sizes, not arranged symmetrically, and black, with a bright 

 silvery pupil or nucleus in the centre. 



E. Ireland and Italy. E. Loffoden I., 300 f. (Sars). 



Var. Dumasii. Body greyish, irregularly streaked length- 

 wise with dark brown and red, and closely speckled with yel- 

 lowish-white : mantle thick and folded inwards ; edges marked 



