144 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



Oil the point forming- the south side of Wrangell harbor, graptolites were 

 found that seem to fix the age of this Wrangell series.' The graptolites are 

 found both in slate and schist. The slate specimens are unrt cognizable unless 

 one knows they are graptolites to begin with. The specimens occurring in 

 the schist, though badly preserved, are easily recognizable as graptolites. and 

 the generic affinities of one individual may be determined with a fair degree 

 of certainty. 



The specimen of chief importance and interest is referred with little doubt 

 to Tetragraptus. It is very like a large species known in the early Ordovician 

 of Idaho Other specimens not so well preserved strongly suggest Phyllo- 

 graptiis. These fossils clearly point to the Beekmantown age of the sediments. 



On Long Island and on Dall Island, on the southwest coast of Prince of Wales 

 Island, are schistose sediments similar to those at Wrangell. They are even 

 more metamorphosed than the Wrangell series where I saw them, and it seems 

 doubtful if fossils would be preserved in them. They may well be of the same 

 age, however. These beds fall in Brooks Wales series. As defined, the Wales 

 series also probably included rocks of Silurian age. 



Aside from establishing the presence of Ordovician sediments in southeastern 

 Alaska, this find is of interest as throwing in doubt the generally accepted 

 views as to the age of the mainland belt of sediments west of the Coast Range 

 bntholith. It has generally been assumed that this belt was of Carboniferous 

 T.id Mes'jzoic age, with the Me^ozoie as the more important element. It wil^ 

 probably be found that, in addition to the Carboniferous and Mesozoic, which 

 are undoubtedly present at some points, all the Paleozoic elements elsewhere 

 known in southeastern Alaska are represented in this coastal belt. 



A brief summary of an extensive paper on the extinct Camelidae was 

 then presented by the author and was discussed by Messrs. Peterson and 

 the author. 



AFFIXITIES AXD PHYLOGEXT OF THE EXTIXCT CAMEL1DJE 

 BY W. D. MATTHEW^ 



(A'bs'fract) 



The author has in preparation a revision of the extinct Camelidae, prelimi- 

 nary results of which are presented. The relationship of the supposed Eocene 

 ancestors of the Camelid?e is discussed, but they are not included in the family. 

 The North American genera and species are revised and their relations are dis- 

 cussed. They afford exceptionally direct phyla from Oligocene to Pleistocene, 

 with two distinct side branches, the giraffe-camels and gazelle-camels, and 

 several minor twigs. The Old World camels belong to the genera Pliauchenia 

 and Camelus, the latter not found in America, and are of Pliocene to recent 

 age. The South American camels form a compact group of two closely related 

 genera, Palwolama and Anclienm, and are of Pleistocene and recent age. Their 

 nearest North American relatives are the smaller species of Camelops (Pleisto- 

 cene), and they are doubtless derived from Pliauchenia, but not from any 

 known species. 



