286 RECORD OF SCIENCE FOR 1886. 



Williams, Henry S. — Coutinued. 



stage of tbe fauna is all that appears, and is there represented by a few 

 specimens in the very upper strata just before the final incursion of the 

 Catskill deposits. 



Williams, Henry S. Description of Prestwicbia eiieiisis. Geol. 

 Mag., September, 1885. (Amer. Xat., vol. xx, j). 157, February, 

 1886. Philadelphia.) 

 Notice of. 



Williams, Henry S. {See Dames; Davis, W. M. ; Kayser; Noet- 

 ling.) 



Williams, Herbert TJph am. IS^otes ou the Fossil Fishes of the Gene- 

 see and Porta?:e Black Shales. (Bull. Buffalo Soc. Nat. Sci., vol. v, 

 pp. 81-84, pi. ou p. 81. 1880. Buffalo. ) 



Gives a short account of the fossil remains of fishes found in the Genesee and 

 Portage black shales or their equivalents, with a few original observa- 

 tions, and describes two new species, Fa}a>oiuscus reticulatus and P. antiquus 



Williams, Herbert Upham. {See Mixer, Fred. K.) 



Williams, S. G. Westwar I Extension of Rocks in the Lower Hel- 



derberg period iu New York. Abstract. (Proc. A. A. A. S., vol. 



XXXIV, part ], pp. 235, 236. 1886. Salem.) 



Mentions the occurrence of Lower Helderberg beds and fossils on Cayuga Lake, 

 at the outlet of Skaueateles Lake and at Oriskany Falls. 



Williams, S. G The Westward Extension of Rocks of Lower Hel- 

 derberg Age in New York. (Amer. Jour. Sci., 3d ser., vol. xxxi, pp. 

 139-145, February, 1886. New Haven.) 



Mentions the occurrence of many fo.ssils. The author thinks it would not be 

 difficult to conceive why the Lower Helderberg should thin to the west- 

 ward where the Salina appears in greatest volume, nor why it should there 

 be represented by impure limestones, resembling the lowest portion of the 

 eastern series, while more nearly synchronous with its higher portions. It 

 would also be natural to expect, in this case, that the fauna of the western 

 strata would consist of forms migrating from the east, and on this account, 

 partaking largely of the life characters of the lower eastern deposits, since 

 such migrations are likely to take i)lace very slowly. 



Williams, S. G. The Westward Extension of Rocks of Lower Hel- 

 derberg Age iu New York. Amer. Jour. Sci., February. (Amer. 

 Nat., vol. XX, p. 372, April, 1886. Philadelphia.) 

 Brief abstract of. 



Williams, S. G. {See Davis, W. M.) 



WiNCHELL, N. H. Notice of Lingula and Paradoxides from the red 



quartzites of Minnesota. Abstract. (Proc. A. A. A. S., vol. xxxiv, 



part 1, pp. 214, 1886. Salem.) 



Merely calls attention to the discovery of tbe fossils mentioned. 



WiNCHELL, N. H. The Tacouic Controversy in a nutshell. (Science, 

 vol. vii. No. 153, p. 34, January, 1886. New York. 

 A plea in faypr of the qse of the term "Taconic." 



