Geology. 159 



Dr. Clark adds a chapter on the "Ithaca fauna of Central New 

 York," and lists L99 species collected by Mr. Luther from 80 

 stations. Of these forms, not less than 106 occur beneath the 

 top of the Tully, abundantly confirming the statement of the 

 author that "the fauna in point of number is prevailingly affil- 

 iated to that of the Hamilton." 



The leading Hamilton species commonly found at these stations 

 are the following : Phacops rana, Pleurotomaria sulcomarginata, 

 Actinopteria boydt, Glyptodesma erectum, 3fodiomorpha eoncen- 

 trica, 31. mytiloides, Grammysia bisulcata, Cimitaria recurva, 

 Microdon bellistriatus, Nuculites oblongatus, Nucula bellistriata, 

 Palmoneilo e?narginata, Paracyclas Virata, Phipidomella vanux- 

 emi, Spirifer mucronatus, Cyrtina hamiltonensis, Camarotoechia 

 congregata and Tropidoleptus earinatus. c. s. 



4. Contribution to the Paleontology of the Martinez group ; 

 by Charles E. Weaver. Univ. California Pub., Bull. Dept. 

 Geol., pp. 101-123, pis. 12, 13, date of printing not given. — This 

 Eocene fauna consists of 67 species. Of these 18 are new and 

 with 3 others are described and illustrated. 



"The Martinez represents a distinct division of time in the 

 geological history of California. It contains a fauna distinct 

 from both the Chico and the Tejon. On the average it is com- 

 posed of about two thousand feet of thick-bedded sandstones, 

 together with some shales, thin-bedded sandstones and conglom- 

 erates. . . . Its position in the geological scale seems to corre- 

 spond most closely to a portion or all of the lower quarter of the 

 Eocene." 



" There was probably no direct faunal connection between 

 India and the Western Coast of North America in Martinez 

 times. . . . The evidence seems also to point to the fact that 

 during this period the Martinez seas were isolated from the 

 regions of the southeastern United States." c. s. 



5. Faune cambrienne du Haut-Alemiejo {Portugal); par J. 

 F. Nery Delgado. Comm. Serv. G-eol. du Portugal, v, 1904, 

 pp. 307-374, pis. 1-6. — This work describes a very interesting 

 Lower Cambrian fauna. It is especially noteworthy because of 

 an abundance of bivalve shells of which 9 species are described, 

 whereas in North America the Olenellus fauna is known to have 

 but 2 species and but one of these is common. 



The author regards this fauna as probably Lower Cambrian; 

 from a survey of the genera adopted, however, his readers would 

 be perplexed to know to what age these beds should be referred, 

 were it not for the good photographic plates illustrating the 

 species. Paradoxides choffati is clearly an Olenellus. The several 

 species (9) of Hicksia are very suggestive of Lower Cambrian 

 Solenopleura and especially of a form found at York, Penn. Of 

 Microdiscus, the author describes 5, but M. caudatus, 3f. subcau- 

 datus, and M. wenceslasi must be placed under a new genus, 

 because they have dorsal eyes and a caudal spine. As M. souzai 

 and 31. woodwardi have eyes, they, too, should be referred to 



