168 QUARTERLY CHRONICLE. 



according to Hensen's experience, the striped muscles alf^o 

 belong ; and that the nerves do not grow out into a tissue, 

 but, through the separation of particular cellsand tissues from 

 one another, become differentiated. He quotes, in addition 

 to his own observations, the ending of nerves in the salivary- 

 gland-cells, in the epithelial cells of the cornea, the rods and 

 cones of the retina, which are simply the epithelium of pri- 

 mary optic vesicle, and therefore continuous with the body- 

 surface originally ; also, lastly, the ending of nerves in teeth. 

 Kowalevsky, in his researches on the development oi Amphi- 

 oxus lanceolatus, recently pointed out the termination of 

 nerves in the epidermic cells of the skin of this fish. 



Courvoisier's paper is principally controversial, and 

 intended to establish his claims in the matter of the spiral 

 and straight fibres of bipolar ganglion-cells. It is illustrated 

 by a plate. The views of Beale, KoUiker, Arnold, Sanders, 

 and Krause, are fully discussed. 



Franz Builds paper is one of gi-eat interest, and, like his 

 paper on the structure of the tooth-pulp and its nerves, 

 which we recently noticed, is a most creditable example of 

 the work which Professor Schvdtze enables his pupils at 

 Bonn to accomplish. The author's observations are similar 

 to those of Pflueger on the salivary glands. He points out 

 the existence of a network of multijiolar nerve-cells in the 

 tissue of the gland, and traces the termination of some of the 

 nerve -fibres in the gland-cells. These matters are illustrated 

 in a clear and well-drawn plate. 



Dr SchAvalbe's paper is a very extensive treatise on the 

 minute structure of the papilla; of the tongue, the peculiar 

 " schmeckbechers," and their relation to the nerves. He 

 points out the existence of certain very remarkable nervous 

 structures. The paper is illustrated with two plates, and, 

 taken in connection with that of Dr. Christian Loven, 

 published in a previous number of the ' Archiv.,' furnishes a 

 very noteworthy addition to the knowledge of the structure 

 of special-sense-organs. 



The invaginated cells observed by Dr. Steudener occur in 

 carcinomatous lymph-glands and in carcinomatous livers. 

 The appearance presented is such that the structure might 

 be taken for mother-cells, with enclosed daughter-cells ; but 

 by a series of transitional forms figured in his plate, the 

 author shows that one cell may be gradually squeezed into, 

 or closed in by, another. 



In the beak of the snipe {Scolopax rusticola) are certain 

 large corpuscles in connection with the fibres of the nerve, 

 and surrounded bv a denselv vascular tissue. These are 



