264 OP HYDATIDS. 



It has not yet been determined, what is the propor- 

 tion of hydatids, which may be called pregnant. 



^rln some cases, the greater part of the inner coat 

 is studded over with these small excrescences, but 

 in other instances, there are only two or three such 

 excrescences, from the parent hydatid. On exam- 

 ining the coats of very large hydatids, even Avithout 

 the aid of a magnifying glass, very small hydatids 

 may be seen adhering to the coats of the hydatid, 

 Avhich would seem to show that hydatids are multi- 

 plied in the same manner as some of the fungi of the 

 vegetable kingdom." 



^^ Blood Vessels of Hydatids. 



^^The coats of hydatids are provided with very 

 small blood vessels, absorbents, and nerves. 



*^The blood vessels proper to the coats of the hy- 

 datid, have no immediate connexion with those of 

 the organ, within which it is lodged ; the hydatid, 

 in this respect, resembles a worm lodged within the 

 human body. 



^^ I have, in several instances, filled, with great 

 success, the blood vessels of the organ within which 

 hydatids were lodged ; also those on the sac of the 

 hydatid ; whicli, where the hydatid is of considera- 

 ble bulk, are of a large size, and which, like those 

 in the neighbourhood of other preternatural tu- 

 mours, acquire an unusual size; but none of the in- 

 jection got into the vessels of the coats of the hyda- 

 tid. 



