I. Fortpflanzungslehre. 555 



over the muscle and inserting the substance with sterilised instrumenta. In 

 the case of gill-tissue with adhering bacteria, intense inflammation was pro- 

 duced. There is active migration of blood-corpuscles, whicb form a plasmo- 

 dial masa round the implanted tissue. This Layer is removed by phagocytes, 

 which also invade and remove the gill-tissue. Meanwhile rapid amitotic 

 ilivision of neighbonring fibroblasts occurs; these lose the typical spindle- 

 Bhape of the nnclei, and bocomc ronnded nuclej with very little cytoplasm. 

 Tbese cella migrate to the implanted tissue, arrange themselves in layers 

 round it. and linally typical „scar" fibrous tissue is formed, enclosing tbe 

 ehitinous skeletons of tbe gill-bars. 



In tbe case of implanted digestive gland, a protective layer of agglutinated 

 corpnscles is formed, but is coutinually dissolved by tbe digestive enzymes 

 of tbe cells of tbe digestive gland. In tbe same way no permanent fibrous 

 tissue is formed, for tbe migrated fibroblasts are dissolved by tbe digestive 

 enzymes. 



In tbe case of agar, no inflammation results, but after seven or eight 

 days tbere is slow and offen mitotic division of neigbbouring fibroblasts, which 

 form a thin layer of fibrous tissue round tbe agar. 



Although tbe tissues and blood, especially its manner of forming a clot, 

 differ markedly from tbose of vertebrates, yet tbe formation of fibrous tissue 

 is similar in the two groups. Doncaster (Cambridge). 



1164) Fink, It., Über die Entstehung traumatischer Epithelzysten. 

 31 S. 8°. Königsberg i. Pr. R Leupold. 1910. 



1165) Heiberg, K. A., Mikroskopiske Undersögelser over Bugspyt- 

 kirtlens normale og patologiske Anatomi, hvorunder Forboldene 

 ved en Del Tilfolde of Sukkersyge. Köbenhavn 1910. (VIII), 199 

 (-}- 3). — 5 Tavler. S. Larsen (Kopenhagen). 



4. Fortpflanzungslehre. 



(Siehe auch Nr. 1088, 1001, 1009, 1101, 1102, 1136, 1147, 1153, 1225, 1229, 1241, 1240, 

 1252, 1253, 1257, 12G3, 1205, 1270, 1279.) 



1166) OiTgoire, V. (Institut Carnoy Louvain), Les Cineses de matu- 

 ration dans les deux regnes. L'unite essentielle du processus 

 meiotique (second memoire). 



(La Cellule 26,2. p. 223—422. 1910.) 



Seconde et derniere partie du travail, dont la premiere a paru en 1905 

 (Les rcsultats acquis sur les cineses de maturation dans les deux regnes, La 

 Cellule, 22). L'auteur a entrepris la täche formidable de faire la critique de 

 toute la littt'ratuiv parue sur les ph6nomenes de maturation de< cellules 

 elles. II s'occupe tout d'abord de mettrr les donneea oonvelles (depnis 1905) en 

 accord avec ce qu'il a appeb'-le mode h6t6ro-homeotypique «los divisious de 

 maturation, et croil y reussir. Le pr6aen1 memoire esl eependant plus sp6ciale- 

 ment consacrö ä la critique des diverses opinions 6mises sur La facon dont. 

 s'opere la reduction num6rique des chromosomes. Bien que Gr6goire ne 

 r6fute ion fondamentale faite par Goldschmidt, Mevea et Fick 



;i la th§orie de la copulation parallele des chromosomes (pour lesquels le 

 dualisme des i; 1 im chromatiquea correspond > ane division longitudinale), 

 ne tienne paa compte des observations concordantes entre elles, mais en des- 

 accord avec 5a thöorie, de Duesberg et de Regaud sur le Rat, ni des diffi- 



