400 APPENDIX. NOTES. 



falling drops also emit light. 1 If Pliny, in his account of 

 this creature, was really speaking of the pholad, it is sin- 

 gular he should not mention its habit of boring rocks. 



NOTE 24, p. 252. Their byssus has long been celebrated, 

 for it is mentioned by Aristotle. Aristotle's mode of ex- 

 pression is singular. A/ E vriwcu ofiat Quovrai etc ra fiucro-x ev 

 TOIS afAfAudsa-i nai @o@ogu$Ecnv. He says also when they are 

 deprived of the pinnophylax, they perish. 2 Pliny, who 

 mostly copies Aristotle's account, does not notice the 

 byssus. 3 



NOTE 25, Introd. p. xcviii. He might have added the 

 four physical cherubim, spirit or wind, light, expansion, and 

 the clouds. I have on a former occasion observed, that the 

 heavens in action, which constitute the Physical Cherubim, 

 are represented by the earthly rulers, whose faces distin- 

 guish the sculptured images called by the same name; 4 

 but it is not there specified, except in one case, 3 of what 

 each may be regarded as the appropriate symbol : I shall 

 therefore here add a few observations upon that subject. I 

 must, however, previously dilate a little upon the number 

 four, which seems consecrated by the prophet in his des- 

 cription of the cherubic forms. Not to mention the whirl- 

 wind, the great cloud, the brightness, and the fire from 

 this came outybwr living creatures, each of which had/bwr 

 faces, four wings, and jfotir human hands under the wings. 



1 His natura in tenebris remote lumine, alio fulgere claro ; et 

 quanto magis humorem habeant, lucere in ore mandentium, 

 lucere in manibus, atque etiam in solo et veste decidentibus 

 guttis. Ibid. 



2 Hist. Anim. 1. v. c. 16. 3 Hist. Nat. 1. ix. c. 42. 

 4 Introd. Ixi, Ixxx. 5 Ibid. Ixxii. 



