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layer, which surrounds the organ on all sides, except its posterior 

 attachment, and in the middle line of its inferior surface. 



The cortex consists of a complicated network of fibres, derived from 

 the hyoglossi, styloglossi, lingualis, chondroglossi, and a pair of new 

 muscles, named by the author Notoglossi. The minute details of the 

 arrangement of these muscles have now been ascertained by the 

 author, and their actions in producing the peculiar volubihty of the 

 organ. 



The cavity of the cortex is occupied by a medulla of transverse and 

 perpendicular muscles, some of which are limited to the cavity itself ; 

 others pass into it from without. 



The transverse system consists of transversales proprii, with the 

 palatoglossi and glossopharyngei, the perpendicular of external or 

 proper, perpendicular muscles, and internal or geneoglossi. 



The transverse and perpendicular muscles are arranged in the 

 medulla, in transversely parallel laminae, which consist alternately of 

 perpendicular and transverse systems, which pass through the muscles 

 of the cortex to the mucous membrane. 



It was also stated, that the human tongue and the ruminant form 

 two types, the latter presenting root, body, and tip, the former want- 

 ing the tip. These two types, also, differ in the former possessing, 

 and the latter wanting, a mesial fibro-cartilaginous septum. 



2. On the Volcanic Formations of the Alban Hills, near 

 Rome. By Professor J. D. Forbes. 



The author thus sums up the general results of his memoir : — 

 " In the first place, it appears that the Alban volcano (for it is 

 essentially one) has acted throughout a great period of time ; for 

 not only has it evidently repeatedly changed its form and materials of 

 eruption, but it is surrounded by knolls of basaltic formations which 

 seem to indicate very ancient and very repeated ejections, without 

 taking the regular form of craters. Such are probably Monte 

 Algido, Civita Lavinia, Monte Giove (Corioli), the Capuccini of 

 Albano, Rocca Priore, Colonna, and perhaps even Capo di Bove, and 

 several open craters, such as one a little below Albano, the Lago 

 Cornufelle near Frascati, the Lake of Gabii, and one near Colonna, 



