YAKUTAT FOSSILS 127 



er's identification of the Triassic Monotis salinaria 

 among fossils collected by Penart from the eastern point 

 of the peninsula at Cold Bay, Alaska. Also by the fossils 

 collected on the southern side of the peninsula of Katmai 

 and near the bay, reported on by Grewingk in I85O. 1 

 These fossils were from two horizons, one with Ammo- 

 nites -wosnessenskiiy A. biplex, and Belemnites paxil- 

 losus?, the other containing a Unio that was somewhat 

 doubtfully identified with U. liassinus. 



The fossils studied and described on the following pages 

 are referred to twelve genera and eighteen species. 

 Thirteen of the species and seven of the genera are re- 

 garded as new, and all of the species, save the tubicolous 

 worm and the pelecypod, are of that difficult and usually 

 very unsatisfactory class commonly called ' fucoids.' 

 Still, since both the worm tubes and the bivalves belong 

 to undescribed genera, we are obliged to rely chiefly upon 

 the evidence afforded by these supposed marine plants. 



We are well aware that paleontologists are of two 

 minds concerning the nature and origin of the majority 

 of the fucoids, but we have not the time, nor is this the 

 proper place, to discuss the questions. Still we may say 

 in passing that we believe many of them are really marine 

 plants, and that the most of the others are more than mere 

 trails or burrows or water marks. Some of them, again, 

 are almost certainly of the nature of sponges. It is to be 

 understood, however, that when we speak of them as 

 marine plants it is not because we believe they are, as a 

 whole, of that nature, but only to obviate the frequent 

 qualification of the words flora and plant by either a ques- 

 tion mark or the word ( supposed.' 



Following the Cambrian, in which the impressions 



1 Beitrag zur Kenntniss der orographischen und geognostischen Beschaffen- 

 heit der Nord-West-KUste Amerikas mit den anliegenden Inseln, von C. Gre- 

 wingk: Verhandl. Russ. k. mineral. Gesell. zu St. Petersburg, Jahrg. 1848-1849, 

 pp. 121, 344-347, published in 1850. 



