1 882.J in the United States for the year 1SS1. 89 r 



Echinocaris and Palaeopalaemon. During the past year he has 

 published the six following articles : " Observations on the struc- 

 ture of Dictyophyton, and its affinities with certain sponges," 

 American Journal of Science, Vol. XXII, pp. 132. This is accom- 

 panied with a note by Dr. J. W. Dawson. " On the structure of a 

 specimen of Uphantaenia," pp. 132, 133; "A new genus [An- 

 thracopupa] and species of air-breathing mollusk from the Coal- 

 measures of Ohio, and observations on Dawsonella," American 

 Journal of Science, Vol. xxi, pp. 125-128, with six wood-cuts; 

 " Description of a new species of Crinoid from the Burlington 

 limestone, at Burlington, Iowa," Bulletin No. 1 of the American 

 Museum of Natural History, pp. 7-9, plates 1-2 ; " Remarks on 

 Dictyophyton and descriptions of new species of allied forms 

 from the Keokuk beds at Crawfordville, Indiana," Bulletin No. 1 

 American Museum of Natural History, pp. 10-20, plates 3 and 

 4- This article contains also a reprint of Dr. Dawson's observa- 

 tions on Uphantaenia already mentioned. Professor Whitfield is 

 the first to announce the opinion that these and kindred bodies 

 are closely related to the so-called glass-sponges. " Observations 

 on the purposes of the embryonic sheaths of Endoceras and 

 their bearing on the origin of the siphon in the Orthoce rata," 

 Bulletin No. 1 American Museum of Natural History, pp. 20-28, 

 and three wood-cuts. Besides his stated work at the American 

 Museum, he is engaged upon the palaeontology of New Jersey. 



Professor Henry S. Williams has published in the Annals of 

 the New York Academy of Natural Science, Vol. II, No. 6, his 

 complete paper on the " Life-history of Spirifcr lavis," of which 

 an abstract was formerly published in the American Journal of 



Professor A. S. Packard, Jr., has published, in the Bulletin of 

 Hayden's U. S. Geological Survey, 1 a description, with figures, of 

 a new species of fossil crayfish, under the name of Cambarus 

 primcBviis. The specimens were from the lower Tertiary fish beds 

 of Bear river, Wyoming Terr. 



In the American Journal of Science, Vol. xxii, pp. I34- T 3 6 » 

 Mr. W. W. Dodge has an article announcing the discovery of 

 Lower Silurian fossils in Penobscot county, Northern Maine. 



During the past year I have published the two following 

 works : " On certain Cretaceous fossils from Arkansas and Colo- 

 rado," Proceedings of the U. S. National Museum, Vol. iv, pp. 

 1 S6-139, and one plate; " Fossils of the Indiana rocks," Annual 

 report for 1880 of the Indiana Geological Survey, pp. 103-154, 

 and eleven plates. I have also several other works now in the 

 Printer's hand. 

 1 See Amer. Nat., Vol. xv, p. 832. 



