363 



In der Nähe der Ventralseite finden wir, gleich unter der Epidermis, 

 Zellen, welche in einer sehr innigen Verbindung mit den ihnen un- 

 mittelbar anliegenden Längsmuskelfibrillen stehen, ein unmittelbares 

 Ganzes bildend. Je weiter, der Dorsalseite näher, desto selbständiger 

 wird einerseits die Zelle und andererseits die Muskelfibrille. Endlich 

 bekommen wir diese zwei Bildungen getrennt und nur vermittels sehr 

 langer Zellenfortsätze vereinigt; jetzt haben wir es mit einer wahren 

 Nervenzelle und Muskelfibrille zu thun. 



Ein solches Verhältnis setzt uns in den Stand, in die histogene- 

 tischen Processe einzudringen und dem Nervennetzwerke , also dem 

 peripherischen Nervensysteme, eine mesodermatische Entwicklung zu- 

 zuschreiben. Was das Centralnerven system anbetrifft , so ist dessen 

 Ursprung für mich in völliges Dunkel gehüllt, obschon man es nach 

 einigen Merkmalen eher als eine ectodermatische Bildung anschauen 

 sollte; dasselbe gilt gewiss auch für die Sinneszellen. 



(Schluss folgt.) 



III. Mittheilungen aus Museen, Instituten etc. 



1. Zoological Society of London. 



20th June, 1882. The Secretary read a report on the additions that 

 had been made to the Society's Menagerie during the month of May, 1882, 

 and called special attention to the following recent acquisitions : — four 

 Pigmy Hogs [Porcula salvania] , a Mediterranean Seal [Monachus albiventer) , 

 two male Argus Pheasants [Argus giganteus) , a Koala [Phascolarctus cinereus) , 

 a Jackass Penguin [Spheniscus magellanicus)^ and a fine pair of Great Ant- 

 eaters [Myrmecophaga jiibatd] . — The Secretary exhibited a series of the 

 diurnal and nocturnal Lepidopterous insects bred in the Insect House in the 

 Gardens during the present season, and called attention to several specimens 

 of clear-winged Moths [Sesiidaé] , a group of insects which had not before 

 been exhibited in the Insect House. The cocoon of Cricula trifenestrata, to- 

 gether with the imago, was also exhibited. — Mr. W. A. Forbes made 

 remarks on the presence of a rudimentary hallux in certain birds — the 

 Albatrosses and two genera of Woodpeckers [Tiga and Picoules], commonly 

 described as being threetoed, and exhibited preparations showing its con- 

 dition in the birds in question. — Prof. Owen read the twenty-fifth of his 

 series of memoirs on the Dinornis. The present communication gave a de- 

 scription of the head and feet, with their dried integuments, of an individual 

 of a species ]3roposed to be called Dinornis dklina. These specimens had 

 been obtained by Mr. H. L. Squires at Queenstown , South Island of New 

 Zealand, and being parts of one individual tended to elucidate in an unlook- 

 ed for degree the external characters of the Moa. — A second communica- 

 tion from Prof. Owen contained some observations on Trichina spiralis — 

 Prof. E, Ray Lankester gave a description of the valves of the heart of 



