which are important only in the aggregate, is 

 accomplished by means of the hidden fibrilJae which unite the condensed 

 with the (Mused system. On the contrary, some ways of direct com- 

 munication between the two systems have been established physiolop 

 cally for the special excitations before provoking a quick respond 

 necessary and fatal. The easy propagation of the sensations thusallows 

 the corresponding motor centers to readily respond." 



The Land Molluscan Fauna of British New Guinea.- 

 Last year Mr. C. Hedley had an opportunity of collecting and study- 

 ing the land shells of this little-known region and has embodied the 

 results in a paper published in the Proceeds. Linn. Soc. vol. vi. 

 The author states that for the convenience of students he gives in his 

 paper a summary of the knowledge of this fauna up to date. 



The land shells of this province exhibit four rather distinct geo- 

 graphical divisions: 



(a) The alpine fauna, whose sole known member is Rhytida globota. 



(b) The region lying between Port Moresby and the Fly Kiver. 

 The types in this region are //,„/,•„ brmvlb, ntn, Geotrochus taybriutii 



■ probably derived IV this fauna, by mi-ration 



across the dry bed of Torres Straits. 



(c) A province which includes the eastern extremity of New 

 Guinea with the outlying islands, of which the typical members are 

 Hadra rehseii, Nanina bumteinu, and C„ olr„rI,ut'l>ri»n> 



(d) The Louisiade, D'entreca'steaux, Trohriand. and Woodlark 

 Archipelagos. Characteristic forms are the Geotrochi allied to Ionia- 

 iadensis and the gigantic Pupinelhe allied to qrnndis. The author 

 thinks that the occurence of G. wehinxn* and /' Um-'n r« on Fergus- 

 son Is. would indicate that the fauna of these i-lands will prove to be 

 related to that of the distant L.uisiadc rather than to that of the 



The Pycnogonid Eye 



