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VOL. XXIV.} PHILOSOPHICAL TRANSACTIONS. 181 



of feet. It looks of a clear, crystalline substance, and almost transparent. 

 The membrane, that invested the cavity of the cells containing it, was very 

 fat, and in most places separated from the bone ; the blood-vessels appeared 

 turgid and inflamed ; whereas the membrane of the opposite cells, which have 

 no communication with these, was thin, pellucid, adherent, and nowise preter- 

 naturally affected. ' 



Mr. Bobart informs me, " that some gentlemen of the university, lately ob- 

 served three worms lodged in the same parts of the head of a sheep, but in 

 two distinct cells; the largest apart by itself, the other two in the cell adjoining, 

 one of which was considerably less than the other, agreeing in form with the 

 forementioned, of a whitish colour in general, with the two notable spots on 

 the flat of the posterior part, but a shadow of brownness from the back down 

 the sides, especially of the riper one; roundly turgid on the back, and flat 

 underneath, divided with several annuli, as these animals generally are ; at the 

 extremity of which protuberances, serving instead of feet, there appears a little 

 darkish brown spot on each side or edge, as they faded and withered they 

 changed to a light red or phoenicious colour, and afterwards brown." 



Moufet * mentions worms yearly breeding in the brain of stags, goats, and 

 sheep, especially when fat ; but supposing them generally known, he gives no 

 description of them ; unless from -j- Benedictus and "j^ Mathiolus ; that they are 

 eulis maximis aequales, et ejusdem cum illis formae ; though the worms meant 

 by those two authors are not found in the brain, but (as they both agree) sub 

 lingua in concavo circiter vertebram, qua cervici innectitur caput. ^ Avicenna 

 asserting the possibility of worms breeding in the head, says expressly multoties 

 nascuntur in anteriore parte capitis super locum qui est in strictura narium ; to 

 which II Foubertus adds, ubi oves, et caprae dicuntur perpetuo vermes habere, ut 

 cervi in gutture. This plainly shows the distinct places of their generating in 

 the heads of stags and sheep, as well as describes the particular cells in which 

 they are found in the os frontis of the latter. 



From hence perhaps we may be allowed to account for those various instances 

 given by medicinal authours, of worms ejected at the nose by men and women. 

 Benivenius, Fernelius, Zacutus Lusitanus, &c. relate several cases of this kind, 

 all agreeing that they were attended with extreme pains in the head, manias, 

 lypothymies, &c. which immediately ceased on their ejection. 



It must be granted, ^^gineta, ** Gabucinus, -f-^ Forestus, -f-§ Borellus, and 



• Theatr. Insect, lib. 2, cap. 30. f Lib. 21, inprooem. J Comment, in Dioscor. lib. 2, cap. 52. 

 § Lib. 3, sen. 1, can. 3, tract. 2. cap. 3. || Cap. 9. de Cephalalgia. ^ De re med. lib 4, cap. 57. 

 ** De Lumbric. cap. 8. -fX Obiservat. medicinal, lib. 21, obs. 28. +§ Hist, et Observat. medic, 

 cent. 2, obs. 70. — Orig. 



