DE. T. S. COBBOLD ON CffiNUEUS. 23 



but I never entertained any doubt as to its distinctness from the 

 ordinary Coenurus cerebralis of the Sheep. I refrained also from 

 giving it any specific title, on the ground that it was only a larval 

 parasite. Shortly afterwards, Leuckart, in one of his able ' Ee- 

 ports' in Wiegmann's Archiv (for 1860, S. 140), made special 

 allusion to the description and figure as given in the Society's 

 * Transactions,' and at the same time referred to a case by Baillet 

 who had recently discovered a Coenurus in the pectoral muscle 

 of a rabbit ; he also quotes a similar example by Eichler, who 

 had found a Coenurus in the siibdermal cellular tissue of a 

 sheep. Until recently, I must confess that I was not aware that 

 the discovery of a second kind of Coenurus dated even much 

 earlier than the period here mentioned, and I doubt if even 

 Leuckart is yet aware of the earliest record on the subject. A 

 few weeks ago, Mr. Caleb B. Eose, now of Great Yarmouth, but 

 formerly of Swaff'ham, Norfolk, called my attention to the circum- 

 stance that he had described Coenuri from the rabbit so far back 

 as the year 1833. He had, indeed, mentioned the fact to me at 

 the Cambridge meeting of the British Association, two years ago, 

 but I could not, at that time, look fully into the matter. I fur- 

 ther understood that Prof. Owen had doubted the correctness of 

 Mr. Eose's interpretation of the facts observed. On comparing 

 the facts as described in the original paper (published in the 

 London Medical G-azette for November 9, 1833) with those ob- 

 served by myself in the Coenurus of the Lemur, and with those 

 observable in the specimens now before the Society, I have no 

 hesitation in saying that not only does a third kind of Coenurus 

 exist, but the priority of the discovery of the second kind of 

 Coenurus is due to Mr. Eose. How many kinds of Coenuri may 

 yet turn up, and how many specific tapeworm-forms they col- 

 lectively represent, it is impossible to say ; but my own exami- 

 nations of, at least, three kinds of Coenuri have led me to believe 

 that they represent three separate species of Tcenia. Proof 

 on this score can only be obtained by future breeding-experi- 

 ments. The study of Mr. Eose's paper further led me to look into 

 Numan's elaborate Dutch memoir ("Over den Veelkop-blaasworm 

 der Hersenen"), in which I find he has made frequent reference to 

 Mr. Eose's paper, as well as to the earlier writings of Owen, Grul- 

 liver, Busk, Goodsir, and other English authors. As regards the 

 Coenurus in question, he merely gives the facts recorded by Mr. 

 Eose ; but he notifies the interesting circumstance that a vete- 

 rinary surgeon of Burgau, Engelmeyer by name, has also found a 



