170 DR. T. S. COBBOLD ON CESTOID ENTOZOA. 



there are many, no doubt, who would have expected that at least 

 a iDortion of the Hyperiidse would be equally abundant. 



But what was really the case ? Why, scarcely any Hyperice at 

 all — that is, so far as I have observed. True, I have not been able, 

 from ill health, to look after the matter so much, nor give it the 

 attention, this summer, that I should have liked ; still I have been 

 out ; and had they been there, I do not think they could have 

 escaped my notice. 



It chanced that one day in July, and two in August, great 

 hordes of the Meditsce were cast in upon our beach; and out of many 

 himdreds of these, which I had the satisfaction of examining, and 

 that carefully too, I only got seven Hyferice — one L. Kinaliani, 

 and six S. galhce. The first was adult, but none of the others. 

 Two, on these occasions, were the most found in a single Medusa. 

 Thus these seven, and about thirty others which I obtained free, 

 are all my season's take — that is, of these two species — making in 

 all about two score. Yes, only two score, and that, too, when, 

 as I have already stated, the Medusae were in such prodigious 

 shoals that they were never known to be so numerous in this 

 part of the sea before. 



On the other hand, I have met with L. Kinaliani and H. galha 

 very plentiful whilst not a Medusa was to be seen and there was 

 perhaps not one in this part of the Pirth. 



Such, then, are a few and rather briefly told facts concerning 

 these curious and interesting creatures — a genus whose true 

 babits and economy seem, as yet, to be but little understood. 

 And if I have been able to add to their general character even but 

 one single fact not hitherto known, I shall consider myself well 

 rewarded for my time and labour — a labour which is to me at all 

 times a pleasant occupation. 



Experimental Investigations with Cestoid Entozoa. By T. S. 



CoBBOLD, M.D., E.R.S., P.L.S., Lecturer on Comparative 



Anatomy at the Middlesex Hospital. 



[Eead Nov. 1, 1866.] 

 Having from time to time in conjunction with Professor Simonds 

 carried on a series of experiments which (so far, at least, as 

 I was concerned) were originally promoted by a small grant 

 of money placed at my disposal by, the General Committee of 

 the British Association, the present record may, in some sense, 

 be regarded as a continuation of our joint Paper communi- 



