468 abstracts: zoology 



The consolidated stratified rocks are intruded by batholiths and thick 

 sills of monzonite, by a complex system of dikes of widely varying rock 

 types, and by pegmatite and quartz veins. Some pegmatite dikes have 

 centers of pure vein quartz. The solid rocks are overlain locally by 

 loosely cemented Kenai (Eocene) beds, and widely by alluvial deposits. 

 The latter include flood plain deposits of the present streams, stream 

 terrace deposits and high lying silts and gravels. Some of the high 

 lying gravels are evidently beach deposits. 



Gold occurs in the metamorphic rocks at a number of places l)ut no 

 workable deposit has been discovered. Placer gold is mined in stream 

 terrace deposits and in the high lying beach gravels. Cassiterite occurs 

 in commercial quantities in some of the gold placers. H. M. E. 



ZOOLOGY. — Description of a collection of unstalked crinoids rnade by 

 Captain Suenson in Eastern Asia. Austin Hobart Clark. Pro- 

 ceedings of the Biological Society of Washington, 26: 177-182. 

 1913. 



The crinoids listed and described are the following: from near Hong 

 Kong, Comanthus japonica (J. Mliller), Zygomeira comata (A. H. Clark), 

 Catoptometra ruhroflava (A. H. Clark) and Dichrometra flagellata (J. 

 Miiller); of these only one, Zygometra comata, was previously known 

 from this locality; from the Philippine Islands, Oligometra serripinna 

 (P. H. Carpenter); from south of the Goto Islands, Parametra orion 

 (A, H. Clark); and from northeastern Korea, Thaumatometra tenuis 

 (A. H. Clark). 



The faunal relationships of the east Asiatic coasts are discussed, and 

 the thirty-six endemic species occurring between southern Japan and 

 Korea and Cochin China are found to fall into four distinct categories: 

 (1) East Indian species, occurring in the Phihppine Islands and on the 

 coast of Cochin China, and extending northward as far as Hong Kong, 

 one of them possibly to Fuchow; (2) southern Japanese species, ranging 

 from Tokyo Bay westward to the Korean Straits and thence southward 

 along the Riu Kiu Islands to Formosa (Taiwan) and Hong Kong, where 

 they occur together with East Indian forms; (3) Arctic species, inhabit- 

 ing the cold water which bathes the continental shores of the Sea of 

 Japan, and ranging southward as far at least as the Korean Straits, 

 possibly even to Shanghai; and (4) Antarctic species, inhabiting the 

 Pacific coast of Japan and reaching their southern limit at Tokyo and 

 Sagami Bays. A systematic list of all the species recorded from the 

 region is given, and the faunal division, to which each belongs, indicated. 



A. H. C. 



