184 QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE. 



in that part of the middle germinal layer which has received 

 in the area pellucida the name of the intestinal fibrous 

 lamina of Remak. 



Finally, statements are made respecting the differences per- 

 ceptible even in the embryo between arterial and venous 

 vessels ; the former possessing even on their first appearance 

 beside an endothelium, a wall closely attached to this, com- 

 posed of branched cells. 



VI. Nervous System — Stieda (Schultze's 'Archiv,* viii, p. 

 274), on the supposed terminal corpuscles in the hairs of 

 some mammalia, calls in question the function assigned by 

 Schobl in his description of the bat's wing and the mouse's 

 ear, to certain structures which he calls terminal nervous cor- 

 puscles or end organs. Stieda recognises the existence of 

 these bodies, only believes them to be not nervous at all, but 

 hair-germs or the first indication of new hair. He has seen 

 them on various parts of the body of mammalia, but very 

 variable in number, according as the individual animal was 

 or was not going through a cliange of hair. 



VII. Organs of Sense. — 1. Gottstein contributes to (Schultze's 

 ' Archiv,' (viii, 145) a paper on the minute structure and 

 development of the auditory labyrinth, &c., in man and 

 mammalia. He describes more particularly the human organ, 

 and compares it with that of other animals. 



2. Nuel has a paper on the same subject in the same 

 journal (p.i^OO). He discusses specially the striation of the 

 membrana basilaris, and the course of nerve-fibres in the 

 canalis cochlearis. Both memoirs are very beautifully illus- 

 trated. 



X. Digestive Organs and Glands. — 1. Heidenhain,in a short 

 note (Schultze's ' Archiv,' viii, p. 279) states that changes 

 dependent on functional activity have been observed in 

 Briinuer's glands, similar to those observed in the glands of 

 the stomach and pylorus. 



2. Schwalbe (Schultze's ' Archiv,' viii, 269) discusses the 

 question whether milk-globules have a membrane, and arrives 

 at the conclusion that they consist of, beside fat, an albumi- 

 nous substance placed externally after the manner of a mem- 

 brane. 



3. Friedinger (' Sitzungsberichte der Wiener Akad.,' Bd. 

 Ixiv, 2 Abth., Octolier, 1871) has studied the different forms 

 of cells distinguished in the gastric glands by Heidenhain and 

 RoUet, in relation to the question which class of cells contain 

 pepsin. In general he confirms the results obtained by the 

 two observers just named in the case of mammaha, and also 

 found, as they did, that in frogs and tritons one class of cells 



