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3. The Egg-Capsuie of Glomeris. 



By T. J. Evans, Lecturer in the University of Sheffield. 



eingeg. 9. Dezember 1910. 



In the issue of the Anzeiger for October the 11th Prof. K. Ver- 

 hoeff , in the course of the last of his many valuable contributions to 

 our knowledge of the Myriopoda, criticises the accounts given by 

 vom Rath and Hennings of the way in which the egg-capsule of Glo- 

 meris is made, and deduces the sequence of events in the process from 

 an examination of the completed capsule. His conclusion »daß zuerst 

 diese (Kapsel) angefertigt werden und erst hinterher das Ei eingescho- 

 ben sind«, even if capable of demonstration by indirect evidence, cannot 

 command the respect due to direct observation, and to this Verhoeff 

 lays no claim. 



Vom Rath, on the other hand, saw the conclusion of the process 

 but his account starts with a >begonnene Kapsel« and he does not state 

 how this was made or how the egg found its way into it. Indeed it is 

 doubtful whether the conditions of partial darkness Avhich he recom- 

 mends for the observation of these animals are conducive to exact re- 

 sults. Vom Rath also denies Humbert's statement that the building 

 material of the capsule comes out of the intestine on the slender ground 

 that he was able to prove that the material of the capsule was always 

 identical with the soil in which the particular female happened to be 

 living at the time of laying. As Ave shall see later, this observation may 

 be true but still admit of a different explanation. As Hennings adds 

 nothing new on this point, it follows that our knowledge of the egg- 

 laying of Glomeris is limited to vom Rath's account of the plastering 

 of a capsulated egg by the everted rectum. 



The present writer has already given a brief account of the pro- 

 cess in a general article on the breeding habits of the British Diplopods i, 



1 Bionomical observations on some British Millipedes. Annals and Magazine 

 of Natural History. Ser. 8. Vol. VI. Sept. 1910. 



