B. V.J THE HISTOKY OF ANIMALS. 135 



them. And so are all those creatures which have feathers 

 with a hollow stem, and those which have hair, except the 

 ass, which has neither lice nor ticks. Oxen have both ; 

 sheep and goats have ticks, but no lice ; hogs are infested 

 with large, hard lice, and dogs with those which are called 

 cynoraistae. All lice originate in the animals that are in- 

 fested with them. All creatures that have lice, and wash 

 themselves, are more liable to them when they change the 

 water in which they bathe. 



3. In the sea is a kind of lice 1 growing on fish ; but these 

 do not originate in the fish, but in the mud. Their ap- 

 pearance is that of wood-lice with many feet, except that 

 they have a wide tail. There is one species of marine lice 

 which occur everywhere, and especially infest the trigla. 

 All these creatures are furnished with many legs, are ex- 

 sanguineous, and insects. The oestrus 2 of the thynnus occurs 

 near the fins : in shape it is like a scorpion, and as large as 

 a spider. In the sea between Gyrene and Egypt, there is a 

 fish called the phtheira, which accompanies the do]phin ; it 

 is the fattest of all fish, because it enjoys an abundance of 

 the food which the dolphin hunts for. 



CHAPTER XXVI. 



1 THEEE are also other minute animals, as I observed be- 

 fore, some of which occur in wool, 3 and in woollen goods ; as 

 the moths, which are produced in the greatest abundance 

 when the wool is dusty, and especially if a spider is enclosed 

 with them, for this creature is thirsty, and dries up any 

 fluid which may be present. This worm also occurs in gar- 

 ments. There is one which occurs in old honeycombs, like 

 the creature which inhabits dry wood : this appears to be 

 the least of all creatures, it is called acari, it is white 

 and small. Others also are found in books, 4 some of which 

 are like those which occur in garments : others are like 

 scorpions ; 5 they have no tails, and are very small. And on 

 the whole, they occur in everything, so to say, which from 

 being dry, becomes moist, or being moist, becomes dry, if it 

 has any life in it. 



1 Perhaps Oniscus Ceti, or Isora. 4 Dumestes Pellio, and D. lar- 

 8 Perhaps Lerncea branchialis. darius. 



2 Tinea pellionella, or T. sarcitella. 5 Phalangium cancroides. 



