ZOOLOGY 223 



is the characteristic speciaHsed part composed of myofibrillae. 

 The former alone is capable of giving rise to regenerative buds, 

 and it is to the loss of this part that the failure of muscles to 

 regenerate at a certain age is due. " II n'y a done pas de- 

 differenciation a proprement parler " ; and in this case there 

 is no parallelism between regeneration and ontogeny. 



R. K. S. Lim has carried out an investigation on the 

 histology of the gastric mucosa {Q.J. M.S., vol. Ixvi). In the 

 cat, gastric glands arise from non-mucoid red staining cells 

 which later become mucoid in character throughout the 

 stomach. The mucoid cells of the fundus vary slightly in 

 appearance in different animals. The mucoid type of cell 

 gives rise to the peptic cells in the cat, and this probably is 

 the case in other animals. The writer concludes that ** the 

 cells of the cardiac and pyloric glands may be regarded as cells 

 which have been prevented from attaining full development 

 by the conditions existing at the orifices of the stomach." 



The various gastric cells are classified from the functional 

 point of view as follows : 



(i) Lowest type — the mucoid cells of the fundus with 

 apparently no pepsin secretion. 



(ii) Cardiac and pyloric cells — which secrete a proteolytic 

 ferment, according to Klemensiewicz and Heidenhain, and 

 exhibit a certain degree of zymogen formation. 



(iii) Highest type — the peptic and oxyntic cells, the most 

 highly specialised. 



The terminations of the human bronchiole are described 

 by H. G. Willson in the Amer. Journ. of Anat., vol. xxx, No. 3. 

 He finds " there is greater complexity, irregularity, and a 

 greater degree of interlocking than is usually described." 



Other papers include : 



Clara, Max, " Kleine liistologische Mitteilungen," Anat. Am., 55 Bd., 



Nos. 16, 17. 

 LoTZiN, Richard. " Ueber die Bedeutung physikalischer Kjiorpeleigen- 



schaften fiir die Vitalfarbung des Knorpels," Anat. Anz., 55 Bd., Nos. 



16, 17. 

 Naccarati, Sante, " Contribution to the Morphologic Study of the Thyreoid 



Gland in Emys Europcea (Turtle)," Journ. of Morph., vol. xxxvi. No. 2. 

 SoNNTAG, C. F., and Duncan, F, M.. " Contributions to the Histology of the 



Three-toed Sloth {Bradypus tridactylus) , Journ. R.M.S., March 1922. 



General and Experimental Embryology. — In a paper " On 

 the Heat Production and Oxidation Processes of the Echino- 

 derm Egg during Fertilisation and Early Development " 

 [Proa. Roy. Soc, vol. xciii. No. B, 654), C. Shearer shows that 

 there is an increase in oxygen consumption and in output of 

 heat and carbon dioxide in the fertilised tgg, which points to 

 the fact that fertilisation leads to an increased liberation of 

 the chemical energy stored up in the egg. However, the 



