208 THE GENUS PEEIPATUS 



their escape ; and that they are able to make their way through 

 astonishingly small apertures. 



Lastly, I venture to express a hope that we may not have to 

 wait so long for an account of the development of the Austra- 

 lian Peripatus as we have for that of the New Zealand species. 

 In the light of what we know of the development of the other 

 species of this genus, it cannot fail to be a most interesting 

 study in morphology, and one which would well repay investi- 

 gation. For this purpose the eggs should be taken out of the 

 uterus of the fresh animal, and if they are heavily yolked, as 

 I believe they are, should be preserved in a saturated solution 

 of corrosive sublimate for a few minutes ; or, better still, in a 

 mixture of l-4th per cent, solution of chromic acid and acetic 

 acid, as recommended by Miss Sheldon in her forthcoming 

 second paper on the development of the New Zealand species. 



Postscript B. 



Dr. Paul Mayer has kindly pointed out to me that I have over- 

 looked a paper by Grube (No. 48) on Peripatus peruanus. 

 The specimen is stated to come from Jelski, in Peru. Grube 

 describes it as being 30*3 mm. in length, and 4*5 mm. in 

 breadth in the middle ; as having twenty-nine pairs of feet, of 

 which twenty-eight are provided with claws. Colour dark 

 brown, with black furrow along the middle of the back, which 

 is covered with white warts ; on the ventral surface there is a 

 longitudinal row of whitish spots ; the genital opening is 

 between the feet of the penultimate pair. 



