REVIEWS 391 



part to the smallness of the body of water and to an overcrowding." It 

 is also noted that the increased number of poral pieces connected with the 

 hydrospires, which are regarded as the respiratory organs of Pentremites, 

 "would indicate an effort of the animal to adapt itself to a depletion of 

 oxygen in this ancient sea." 



The descriptions of the Bryozoa and Gastropoda including Crustacea 

 are by Dr. Cumings. The Bryozoa come from the top of the formation in 

 an exceedingly soft, loose-grained, and greatly decomposed limestone, in 

 which they are beautifully preserved. It is stated that, "Very few Bryozoa 

 have ever been described from the famous oolitic limestones of Indiana," 

 and that, "No better preserved fossils have ever been studied by the writer 

 than these exquisite Fenestellids and other Bryozoa from the Dark Hollow 

 quarries of Bedford." The descriptions of the Vertebrates, which consist 

 of fish remains, were prepared by Professor Branson, of Oberlin College. 

 This portion of the monograph is illustrated by forty-two plates which in 

 their reproduction leave something to be desired, as is frequently the case 

 in the illustrations of the fossils contained in the reports of state geological 

 surveys similar to that of Indiana. 



C. S. P. 



Evidences of a Coblenzian Invasion in the Devonic of Eastern America. 



By John M. Clarke. Festschrift zum siebzigsten Geburtstage 



von Adolf V. Koenen, pp. 359-68. 

 Dr. Clarke has devoted a portion of each of several recent summers to 

 the field examination and collection of fossils of the Devonian formations of 

 eastern Canada. In connection with this investigation he has critically 

 studied the Devonian faunas of Gaspe in eastern Quebec, Dalhousie in 

 northern New Brunswick, and those of the eastern and central portions of 

 Maine, and this paper contains a preliminary statement of the results which 

 have been obtained. It will be remembered that the Lower Devonian of 

 central Europe has generally been divided into two terranes, of which the 

 Gedinnian is the older and the Coblenzian the younger. 



It is stated that in Gaspe the Lower Devonian faunas are singularly 

 profuse and are contained in a series of limestones reaching an approximate 

 thickness of 1,500 feet. These limestones rest unconformably on Cambrian 

 slates and have been divided into three terranes. The lowest one has been 

 called the St. Alban beds by Dr. Clarke and its fauna "is an almost pure 

 strain of the Helderbergian (especially Coeymans limestone and New 

 Scotland beds) of New York." The middle division is the Cape Bon Ami 

 beds with a sparse fauna which, however, has a similar relationship to that 



