Kejoinder io Brauern: Thatsüchliche Berichtigumj. 379 



„mich an Weismanirs und meine Untersuchungen." Ti'ans- 

 hition: „Tlic fact thatMiall has not found any brain in thc larva-licad 

 o{ Chironomus, still requires confirmation. I rely on Weismann's 

 researches as well as on my own." Here Brauer distinctly 

 asserts that he has examined the larva of at least one genus tliat 

 of Chironomus, and that his result agrees with Weismann's. 



The i)assage in Professor Miall's letter to me speaKs for itsclf: 

 „Br-iuer cannot claim Weismann as supporter of his Statement 

 „about the brain of Chironomus. Weis mann says (about thc growth 

 „of the larva): ,Das letzte Ganglion rückt um ein ganzes Segment 

 „weiter nach vorn, die Schlund-Ganglien aber treten aus dem Kopf 

 „nach rückwärts und liegen jetzt zur Hälfte im ersten Leibessegmenl, 

 „um einige Tage später vollständig in dasselbe hinüberzutreten' (Ent- 

 „wickl. d. Dipteren, p. 43, 1864). It was on account of this clear 

 „Statement that I treated the matter so briefly in our paper about 

 „Chironomus. The position of thc brain in a Chironomus can bc 

 „dctcrmined without dissection. Living larvac can always be pro- 

 „cured. If one is placed alivc under a low power of the microscope 

 „it is casy to see who is right in the question under dispute." — 

 Sapienti sat! 



Heidelberg, Dec. 11, 1893. C. R. Osten Sacken. 



