872 ANATOMY AND DEVELOPMENT 



a large part of the beautiful drawings with which the mono- 

 graph is illustrated. Many of these had been executed by her 

 under Professor Balfour's personal supervision ; and the know- 

 ledge of his work which she then acquired has been of the 

 greatest assistance to us in preparing the MSS. and drawings for 

 publication. 



Since his death she has spared no pains in studying the 

 structure of Peripatus, so as to enable us to bring out the 

 first part of the monograph in as complete a state as possible. 

 It is due to her skill' that the first really serviceable and accurate 

 representation of the legs of any species of Peripatus available 

 for scientific purposes are issued with the present memoir 1 . 



We have purposely refrained from introducing comments on 

 the general bearing of the new and important results set forth in 

 this memoir, and have confined ourselves to what was strictly 

 necessary for the presentation of Mr Balfour's discoveries in a 

 form in which they could be fully comprehended. 



Mr Balfour had at his disposal numerous specimens of 

 Peripatus nova zealandia, collected for him by Professor Jeffrey 

 Parker, of Christchurch, New Zealand ; also specimens from 

 the Cape of Good Hope collected by Mr Lloyd Morgan, 

 and brought to England by Mr Roland Trimen in 1881 ; and 

 others given to him by Mr Wood Mason, together with all the 

 material collected by Mr Moseley during the "Challenger" 

 voyage. 



A preliminary account of the discoveries as to the em- 

 bryology of Peripatus has already been communicated to the 

 Royal Society 2 . It is intended that the present memoir shall 

 be followed by others, comprising a complete account of all the 

 species of the genus Peripatus. 



H. M. MOSELEY. 

 A. SEDGWICK. 



1 The drawings on PI. 47, figs. 9 and 10 on PI. 48, and the drawings of the 

 embryos (except fig. 37), have been made by Miss Balfour since Professor Balfour's 

 death. 



5 Proc. Royal Soc. 1883. 



