N. A. INVERTEBRATE PALiEONTOLOGY. 749 



later Inadunata ; throughout the Camarata they persisted through life. 

 B. The veutral perisome. 



(3) The relations of the Palceocrinoidea to the Neocrinoidea. Give a 

 definition of the two groups. 



(4) Classification. The following classification is adopted, viz : 



Phylum Echinodermata. 



Class Pelmatozoa. 



Subclass I. Anthodiata. Subclass II. Crinoidea (Brachiata). 



Order I. Cystidea, &c. Order III. Palaeocrinoidea. 



Order II. Blastoidea. Order IV. Neocrinoidea. 



Definitions of the class Pelmatozoa and subclass Crinoidea are given. 



(5) The subdivisions of the Palwocrinoidea. These have already been 

 mentioned. 



The suborder Camarata is divided into ten families, which are de 

 fined ; they are as follows : (A) Beteocrinidw, (B) Rhodocrinidce, (C) 

 Glyj)tasterkkVj (D) Melocrinidw, (E) Acthiocrinidw, (F) Platycrinidw, 

 (G) IIexacri)iidw, (H) Acrocrinidce, (I) Barrandeocrinidw, (J) Euca- 

 lyptocrinidai. Under the first family, Beteocrinidw, the new genus Can- 

 istroerinns* is described. Under the second family, Rhodocrinidce, the 

 new genus Bhaphanocritiusf is described. Under the third family, Glyp- 

 tasteridw, the new genus Ptychocrinus\\'& described. 



The work contains descriptions of the genera that were not consid- 

 ered in parts i and ii, and the results of the authors' further studies in 

 their bearing on the genera heretofore discussed. The figures have 

 been very well drawn by M. Orestes St. John. 



Walcott, Charles D. — Palaeontology of the Eureka District. Pop. 

 Sci. 3Ionthly, vol. xxvii, p. 134. November, 1885. New York. 



Notice and very brief abstract of Mr. Walcott's Monograph, U. S. 

 Geol. Survey, vol. viii. 



Walcott, Charles D. — Description of the [Deer Creek, Arizona] 

 Coal-field. (Letter from the Secretary of the Interior, transmitting, 

 in compliance with law, letter of the Commissioner of Indian Affairs, 

 with report upon the coal on the White Mountain Reservation in Ari 

 zona. Senate Ex. Doc, No. 20, Forty-eighth Congress, second session 

 Appendix i, pp. 5-7. 1885. Washington.) 



Gives a list of the fossils collected from the Carboniferous and De- 

 vonian limestones. Refers the coal-beds to the Cretaceous, and gives 

 the genera of plants found in them, as identified by Mr. L. F. Ward. 



* Kdvid rpov, a willow basket ; xpivov, a lily. 

 iPdq}avo?, a radish ; xpivov, a lily. 

 t IItv^, a fold ; xptvov, a lily. 



