136 Ogueff, Prof. Gilson's ,,Cellules musculo-glandulaires. 



iu the ,,Zeitschrift f. wiss. Mikroskopie", Bd. XIV, p. 444. The fixa- 

 tive used was the iridium-chloride-acetic, described in the same volume, 

 pages 195196. 



Diagrams. 



1. Polymorphous spermatogoninm. The black granules are the 

 chromioles. The lighter granules are the liniu granules, in the dia- 

 gram represented as a thread. This cell is in a state of perfect rest, 

 only a few of the chromioles are figured. Chromoplasts, or net-knot. 

 Linino-plast or true uucleolus. 



2. First maturation cell. Two chromoplasts connected with 12 

 leaders or incipient chromosomes. Each leader is made up of incipient 

 chromomeres containing three chromioles each. 



The Chromioles are supported by liuiu. Lininoplasts. Chromo- 

 plasts. Nucleus. Leaders. 



3. The same cell as iu diagram 2 in a more advanced stage. 

 The two chromoplasts are connected with 6 leaders each. Each 

 leader is made up of 6 chromomeres containing 6 chromioles each. 

 Liuin and lininoplasts are not figured. Chromoplasts. Nucleus. Leaders. 



4. A chromoplast to which is attached a split chromosome, just 

 before separation of the two daughter chromosomes in the eqnatoreal 

 stage. The chromosome which originally consisted of a leader with 

 6 chromomeres has split lengthwise, the chromioles have doubled and 

 the two halves are now being pulled appart by the beaded contrac- 

 tile fibres of the spindle. Contractile beaded, spindle fibres. Chromo- 

 plast with refractive granules. Ohromomere with 6 chromioles. 



5. A daughter chromosome immediately after separation. The 

 chromoplast is attached to the apex of one of the limbs. The chromo- 

 some is V-shaped and consists of 6 chromomeres each one with (5 chro- 

 mioles. At the junction of the two limbs is seen attached the beaded 

 contractile fibre. Chromoplast. Chromomeres with (> chromioles each. 



28. Oct. 1898. [14] 



Prof. Gil son's Cellules musculo-glandulaires". 

 Von Dr. J. Ogneff in Moskau. 



In einem der letzten Hefte der bekannten Zeitschrift ,,la Cellule" 

 (Bd. XI VI. fasc.) giebt Prof. Gilson eiuesehr interessante Beschreibuug 

 des Baues der von ihm gesehenenZelleu, welche die Leibeshohle des 

 Wurmes Owenia fusiformis bedecken. Ini Gegensatz zu den gewohu- 

 lichen Befunden bei den Aunelidcn trifft Gilson in der Haut von 

 Owenia nach inueu von dern auBeren Epithel uicht zwei - - die niusku- 

 lose und peritonealen Schichten an, sondern nur eine, welche aus be- 



