398 Scientific Intelligence. 



order, seven new families, twelve now genera and twenty new 

 species of annelids, the fossils revealing more or less of the entire 

 form of the animals. This is a most remarkable preservation, the 

 like of which is unknown in any other deposit. The animals vary 

 in length from 8/8 inch (lo 1 ""') up to more than 10 inches (26 cm ). 

 The class ChsetOgnatha is represented by A miskwia (I species); 



the Polych.Tta by Mishoia (1), Aysheaia (1), Canadia (s), Sel- 

 kirkia (3), Wiwaxia (1), Pottingeria (1), and Worthemlla (1); 

 the Gephyrea by Ottoia (3), Bunffia (1), Pikaia (1), and Oesia 

 (1). There is also an illustration of Hyolithes with parts of the 

 animal that suggest pteropod fins. v 



This discovery "opens up a new point of view on the develop- 

 ment of the Annulata. The fact that from one very limited 

 locality there have been collected eleven genera belonging to 

 widely separated families points clearly to the conclusion that the 

 fundamental characters of all the classes had been developed 

 prior to Middle Cambrian time. No examples of the Class Hiru- 

 dinea have been recognized, but the segmentation of the Chaeto- 

 poda is present in Ottoia and Banffia, annelids which otherwise 

 are true Gephyrea ns. To a certain extent these two genera 

 serve to link the Chsetopoda and Hirudiriea. 



"I should not be at all surprised to find representatives of the 

 Archi-Annelida in the Burgess shale." c. s. 



5. The extent of the Anderdon beds of Essex county, Ontario, 

 and their place in the geologic column; by Rev. Thomas Nattress. 

 Thirteenth Rept. of the Michigan Academy of Science, pp. 87-96, 

 1911. — This paper presents conclusive evidence that the Ander- 

 don and Amherstburg limestones are not Silurian in age and can- 

 not be included in the Monroe series, but "are of Devonian age." 

 The Anderdon limestone lies in a trough of Monroe strata, and is 

 to be grouped with the Onondaga formation of Middle Devonian 

 time. c. s. 



6. Connecticut Geological and Natural History Survey. 

 Volume III, Bulletins 13-15. — This third volume of the Con- 

 necticut State Survey contains Bulletbis 13, 14, and 15, all issued 

 previously in separate form and noticed in earlier numbers of 

 this Journal. Bulletin 13 is on the Lithology of Connecticut ; 

 Bulletin 14 gives a Catalogue of the Flowering Plants and Ferns 

 of Connecticut ; Bulletin 15 is a second report on the Hymeniales 

 of Connecticut. 



Bulletin 16, now published, is a Guide to the Insects of Con- 

 necticut, prepared under the direction of W. E. Britton. Pp. 169, 

 66 figures, 8 plates. Part I by Dr. Britton is given to a general 

 Introduction, and Part II by B. H. Walden gives a list of the 

 Euplexoptera and Orthoptera of Connecticut. 



1. The Production of Gems and Precious Stones in 1910 • 

 Douglas B. Steisrett. — This advance chapter from the Mineral 

 Resources of the United States in 19 JO has recently been issued. 

 A summary of the chief points of interest is contained in the fol- 



