612 



der Membran dieses Eitheiles bei Reptilien beschrieben hat. Ich will 

 sie Mantelschicht nennen, da sie als eine von der Membran des 

 Keimbläschens bestimmt verschiedene Lage zu erkennen ist. Nur zeit- 

 weilig vorhanden , wie ich es bei Arten von Säugern, Amphibien, 

 Fischen, mehreren Arthropoden und Würmern gesehen, unterliegt 

 auch ihre Ausdehnung um das Keimbläschen herum mancherlei Ver- 

 schiedenheiten. Die Substanz dieser Mantelschicht betreffend, so be- 

 steht sie aus Körnern oder Krümeln, die vom Aussehen der Keimflecke 

 sind und dabei öfters so gruppirt, daß dadurch eine strahlige Streifung 

 zu Tage kommt. Ich werde Beobachtungen mitzutheilen haben, welche 

 in hohem Grade wahrscheinlich, um nicht zu sagen gewiß machen, daß 

 besagte Schicht um das Keimbläschen mit dem Austreten von Keim- 

 flecken im Zusammenhang steht. 



(Schluß folgt.) 



III. Mittheilungen aus Museen, Instituten etc. 



1. Linnean Society of New South Wales. 



28**" September, 1887. — 1) Descriptions of new Australian Fishes. By 

 E. P. Ramsay, LL.D., F.R.S.E., and J. Douglas- O g ilby. The fishes 

 described are (1) Opisthogtiathus inornatus from Derby, King's Sound, N. W. 

 Australia ; (2) Neopempheris pectoralis taken by Mr. Theodore Bevan in the 

 Aird River, New Guinea ; (3) Trichiurus Coxii from Broken Bay; and (4) Cos- 

 syphus bellis from Shoalhaven. — 2) and 3) Botanical. — 4) Notes on Austra- 

 lian Earthworms. Part IV. By J. J. Fletcher. A preliminary account is 

 here given of six new species of earthworms, of which four [Notoscolex Gipps- 

 landicus, N. ttiberculatus , Perichaeta Bakeri, and P. dorsalis) are from Gipps- 

 land , Victoria , one [Notoscolex Tasmanianvs) is from Tasmania , and one 

 [Cryptodrilus viediterreus) from the interior of New South Wales. The first- 

 named species comprises very large worms with about 500 body-segments ; 

 and as, among other points of difi"erence, a girdle of the ordinary character 

 is present, commencing with the posterior portion of segment XIII and in- 

 cluding XXI (the male pores being on XVIII), the species is perfectly distinct 

 from Megascolides australis from the same district, described by Prof. McCoy. 

 The Tasmanian Notoscolex though smaller is still a large worm, with about 

 200 body-segments. — 5) Observations on early Stages in the Development 

 of the Emu. By W. A. Haswell, M.A., D.Sc. Though much has been 

 written on the embryology of birds, no member of the Ratite or Struthionid 

 sub-class has hitherto been made the subject of investigation. The subjects 

 mainly dealt with in this Paper are the history of the primitive streak, the 

 mode of origin of the mesoblast and of the notochord, and the neurenteric 

 canals. — Mr. Made ay exhibited a specimen oî Erythrichihys nitidus of 

 Richardson, described in the , Voyage of the Erebus and Terror', from West 

 Australia. He had received the fish from Mr. Morton of the Hobart Museum. 

 It had been captured on the South Coast of Tasmania. 



Druck von Breitkopf & Hârtel in Leipzig. 



