THE MALAYAN SPECIES OF ONYCHOPHORA. "77 



structures as the ova of Eoperipatus aud Peripatoides, 

 cells which are full of food-yolk, and coDsequeutly most 

 difficult to preserve in a good condition. How difficult food 

 material of any kind is to preserve is too well known to need 

 any further explanation in the present paper. For these 

 reasons it seems that we are fully justified in questioning the 

 accuracy of Dr. Willey^s conclusion. It is much more likely 

 that the older embryos that he took out of the uterus of P. 

 novEe-britanniae were not well preserved, than that there is 

 a periodic histolysis of the endoderinal cells. Dr. Willey^s 

 " strands of protoplasm, beset with eosinophile globules of 

 varying sizes/' seem to be nothing but the broken cell walls 

 of badly preserved specimens. 



Conclusion. 



In addition to those whom I mentioned at the close of the 

 first part of my account of the Malayan species of Onycho- 

 phora, my thanks are due to Mr. P. J. Bayzand, the able 

 artist in the Department of Comparative Anatomy at Oxford, 

 for the trouble he has taken with the drawings on PI. 5, 

 and especially to Professor Poulton for reading over the 

 proof-sheets. 



This Department of Comparative Anaiomy, 

 The Museum, OxroRo; 



March 19tii, lUOl. 



List of References. 



1. Balfour, ¥. M.— "The Anatomy and Development of P. capeusis." 



Posthumous memoir, edited by H. N. Moseley and A. Sedgwick. 

 'Quart. Journ. Micr. Sci.,' vol. xxiv, pp. 213—259, Plates 13—20. 



2. Evans, R. — "On Two New Species of Onycliophora from tlie Malay 



Peninsula," 'Quart. Journ. Micr. Sci.,' vol. xliv, pp. 473—538, Plates 

 32—37. 



3. Gaffron, Ed. — "Beitrage zur Anatomie und Histologic von Peripata," 



Parts I and II in Schinder's ' Zoologische Beitrage,' vol. i, 1885, pp. 

 33 and ]45, Taf. vii — xii und xxi — xxiii. 



