of a South- Sea Voyage. 267 



curious analogy with that of our Peripatus, although the 

 nutritive conditions in the present case have been altered in a 

 somewhat different direction, and the ectoderm is required to 

 be absorptive, and not merely retaining as in the earthworms. 

 Indeed, it seems scarcely extravagant to hope that renewed 

 investigation may reveal traces of some structure comparable 

 to the trochosphere head-kidney. Further details will in any 

 case be awaited with interest. 



So much for the resemblance of the new Peripatus embryo 

 to the trochosphere. It must at the same time be confessed 

 that the presence of a primitive streak points to the proba- 

 bility that the original free larva of Peripatus, postulated by 

 Kennel and Willey, was not in all respects a typical trocho- 

 sphere. But it seems not unlikely that this very feature may 

 lead to the most valuable results when the whole question is 

 fully discussed. 



The other articles in Part I. are : — one by Dr. Paul 

 Mayer on a new Caprellid, to which he has given the name 

 of Metaprotella sandalensis, and which is interesting on 

 account of its habitat, Caprellids being rare in the tropics ; 

 one by Mr. G. A. Boulenger on the rare sea-snake A ipysurus 

 annulatus (Krefft) ; two by Mr. R. I. Pocock on the Arach- 

 nids and Myriapods respectively ; and one by Dr. David 

 Sharp on the Phasmidae, with notes on the eggs. The intro- 

 duction to the latter article contains some very interesting 

 remarks on the eggs of Phasmidse and other subjects relating 

 to the same family. 



With the exception of a valuable little paper by Mr. J. 

 Stanley Gardiner on the postembryonic development of the 

 Fungid coral Cycloseris, which he finds to closely resemble 

 that of Fungia, the whole of the second part is given up to 

 systematic accounts of the collections of various groups of 

 animals. It includes a paper on the Milleporiche by Pro- 

 fessor Hickson, containing some interesting remarks on 

 retractile nematocysts in that group ; and reports on the 

 Holothurians by Mr. F. P. Bedford, on the other Echino- 

 derms by Prof. Jeffrey Bell, on Sipunculids by Mr. A. E. 

 Shipley, on Solitary Corals by Mr. J. Stanley Gardiner, on 

 Earthworms by Mr. F. E. Beddard, and on Gorgonacea by 

 Miss I. L. Hiles. 



For the rest, the style in which this publication is produced 

 is above praise. The type is large and clear, and set in fair 

 wide margins ; the plates are excellent, and accompanied, 

 where this is needed, by full and clear explanations. A good 

 setting for good work. 



