104 REPORT— 1867. 



tion, appear that the nenoiis structures of liTiug animals are peculiarly sensitive 

 to the stimulating agencies present in the solar raj^s, iiTespective of the actual heat 

 of the latter ; and it is thus rendered probable that it is not the calorific element of 

 those raj's that produces the effects witnessed in my experiments. Whether or not 

 'their actinic or chemical part chiefly operates in these cases, or -whether another 

 active power nearly allied to electricity, or the nervous force itself, is really con- 

 tained in the sun's rays, must be left for further research." 



On the Presence of Quimne and other Allcaloids in the Animal Economtf. 

 Bij WENTWORTn L. Scott. 



Professor Allen Thomson exhibited microscopical preparations of the Cochlea, 

 of the Retina, and of Teeth of Fossil Fishes. 



A Contnlmtion to the Anatomy of the Pilot Whale (Globioccphalus svineval). 



By Prof. Turner. 



Two inncnninate arteries arose from the transverse part of the arch of the aorta; 

 the right bifurcated, and by one branch gave origin to the carotis cerebralis, carotis 

 facialis, and subclavian arteries, by the other to the cervico-occipitalis and the 

 art. thoracica posterior dextra. The left iimominate gave origin to a small thyroid 

 artery and then bifurcated : its anterior branch divided into carotis facialis and 

 subcla-N'ia sinistra ; its posterior branch into carotis cerebralis and cervico-occipi- 

 talis. The art. thoracica post, sinistra arose from the back of the arch close to its 

 junction with the ductus arteriosus. Tlie cerebral carotids diminished very much 

 in size before entering the .«kull, as Shai-pey and Yon Baer had already shown in 

 the porpoise. Q'he weight of the brain was 58 oz., and the amount of blood con- 

 vej-ed to it by these arteries was much less than in the adult human brain, so that 

 the functional activity is necessarily slower than in the brain of Man. 



The stomach was subdivided into five compartments : the 1st and 2nd communi- 

 cated with the bottom of the a?sophagus, and along with the .'hd cowesponded to 

 the first three subdivisions of the stomach of the poiiioise. Tlie 4th compartment 

 in the Pilot Whale is not difl'orentiated in the porpoise, but the .5th compartment 

 corresponds to the 4th or sigmoid stomach of the porpoise. Between it and the 

 cylindrical duodenum was a dilatation, which differed from the dilated commence- 

 ment of the duodenum in the porpoise in not having the hepatico-pancreatic duct 

 opening into it. 



These and other details are given much more fully in the ' Journal of Anatomy 

 and Physiology,' November 1867. 



Microscopic preparations in illustration of the ultimate arrangement of the bile- 

 passages and of the minute anatomy of the nervous sj-stem were exhibited by 

 Prof Turner. The preparations were made by Mr. A. B. Stirling, Assistant in 

 the Anatomical Museum, University of Edinburgh. Tlie sections of the liver, 

 from the rabbit, served to confirm the recent views of Ilering and others, that the 

 bile passes to the periphery of the lobules in channels, which lie between and have 

 their walls fonued by the liver-cells, and wliicli communicate with the interlo- 

 bular branches of the hepatic duct. 



GEOGEAPHT AND ETHNOLOGY. 



Address hy Sir SAJirrL Baeer, F.P.G.S., President of the Section. 



Two years have elapsed since, in the mouth of September ISG-S, jaded with the 

 anxiety and fatigue of nearly five years' exploration, I and the devoted companion 

 of my journey — my wife — returned to civilization from a land of savages, from the 



