266 DR. MARTIN BARRY ON THE CORPUSCLES OF THE BLOOD. 



part circumscribed by a dotted line ; the latter part being continued 

 from the orifice (y y,) to the centre of the object y, and brought into 

 view by depressing the instrument. I. A larger object, being either an 

 advanced state of j3 and y, or else containing several objects such as these. 

 S Seemed to be composed of discs, among which were seen some with 

 caudal appendages, — probably spermatozoa. I Was circumscribed by 

 a membrane. (Acetic acid.) 



Fig. 162. Stone-chat. Objects from the testis; namely, a, altered corpuscles 

 having the same appearance as corpuscles of the blood, — and |3, y, ^, por- 

 tions of spermatozoa, forming out of such altered corpuscles. Red co- 

 louring matter visible in all. The corpuscles composed of discs. j8. Part 

 of two spermatozoa, in the course of formation out of discs, y. Discs 

 which appeared to have coalesced at their extremities and sides. At 

 the upper part, and on the left side, of this object, is seen a partially 

 formed spermatozoon. It would thus seem that the spermatozoa are 

 here formed by division of the discs ; and this mode of origin is no doubt 

 connected with their spiral form. I. Portion of a spermatozoon com- 

 pletely formed. 



Fig. 163. From the testis of the same Bird, after a night's maceration in water, 

 a. The large corkscrew-like extremity of a spermatozoon. |3. Outline 

 of two similar objects, the position of which, in relation to each other, 

 was such as to suggest the idea that the division of the discs, for the 

 formation of the spermatozoa, was either incomplete, or so recent that 

 the spermatozoa were still imperfect ; and that their position had not 

 changed. The objects in this figure were blood-red. 



In the figures of the ovum (figs. 164 to 173.) the letter c denotes the germinal 

 vesicle, g the discs of the ovisac, and h the membrane of the ovisac-}-. 



Fig. 164. Wryneck {Vunx Torquilla, Linn.). Corpuscle having the same appear- 

 ance as a blood-corpuscle, very much enlarged, and filled with young 

 corpuscles. Each of these young corpuscles is an ovum (including 

 the ovisac) in a rudimental form. These objects are for the most 

 part in outline ; but three of them are in a more finished state. 

 g. Discs, into which a portion of the young corpuscle has divided. In 

 some parts these discs were quite red ; in others pale. c. Germinal 

 vesicle, in the situation of the original depression existing in the young 

 corpuscle, when the latter was a disc. In the young corpuscle on the 

 right, c is still a mere disc, having a diameter of y^o"'- At a certain 

 part, the membrane of c presents an orifice, indicating the situation of 

 the future germinal spot. (Acetic acid.) 



Fig. 165. From the same ovary. Corpuscles having the same appearance as young 

 t The satne letters are here used, and they denote the same objects, as in my memoirs on Embryology, //. c. 



