ON HEAT GENERATED IN THE BLOOD. 137 



pean Pcrmiau, is highly suggestive. The remaining form, lletriojjhT/Uum, 

 offers a great difficulty, for if the received classification be adopted, the genus 

 is very aberrant. Thus 3Iefr{o2)hi/Uum has not four principal septa, but the 

 septa are arranged in four groups, a gap or kind of septal fossula being be- 

 tween each gToup. The British Devonian species (M. Battershiji, Ed. & H.) 

 was founded upon a transverse section of a slab, and therefore the entire 

 nature of the septa could hardly he determined. The question arises at once, 

 what do those septal fossute mean? And another follows very naturally, are 

 they in relation with the primary septa ? 



I think that they denote a difference in the physiology of the polype, for 

 they would permit of a deeper development of the visceral cavity and an 

 enlarged condition of the ovarian apparatus. Moreover, these fossulaj may 

 have much to do with the growth of the coral in calibre and in septal num- 

 ber ; and, furthermore, Lindstrom's admirably suggestive paper on the oper- 

 culated structures, necessitates much attention being paid to them. Can 

 there be any genealogical classification which will connect in one family 

 such different forms as MetriojpliyUum and Pohjcxelia ? I think not. 



Eliminating, then, MetriophyUam from the Stauridaj, I propose to permit 

 the genus to remain per se for the present. 



2. Ctathoxonidje. — Genera: Cyathoxonia, Palaeozoic; HaplopliylUa^Som- 

 tales) and Guynia (Duncan), recent. 



This group has no endotheca, and resembles the TurbinolidoB amongst the 

 Neozoic corals, but it has the quaternary arrangement of the septa. 



All the forms are simple. Cyathoxonia preceded the others, and all are 

 closely allied. The foreshadowing of the Neozoic forms in the Palteozoic 

 Cyathoxonidse is evident enough. 



Re]}ort on the Heat generated in the Blood during the process of 

 Arterialization. By Arthur Gamgee^ M.D., F.R.S.E., Lecturer on 

 Physiology in the Extra-Academical Medical School of Edinburgh. 



In a Report which was submitted to the British Association in Liverpool 

 last year*, I very shortly alluded to the objects which I had in view in com- 

 mencing an investigation on the very obscure subject of the heat generated 

 during the arterialization of blood. 



I pointed out that two methods of research suggested themselves as likely 

 to elicit facts which would lead to a solutioii of the problem, and I stated 

 that both these methods had been employed by previous observers. 



The first method, which would at first sight appear likely to furnish us 

 with most important data, consists in ascertaining the temperature of the 

 blood in the right and left ventricles of the heart of living animals. If our 

 methods of experimenting were free from the great fallacies which are in- 

 troduced when we are compelled to interfere, in a serious manner, with the 

 central organ of the circulation, and if it resulted that the left side of the 

 heart contained blood warmer than that of the right side, we should be driven 

 to the conclusion either that during the process of absorption and combina- 

 tion of the oxygen of the air a very perceptible evolution of heat had oc- 



* Eeport of the Liyerpool Meeting, p. 228. 



