HUDSON RIVER BEDS NEAR ALBANY 523 



upper Trenton. Unfortunately, no fossils have been found yet in 

 this neighborhood between the middle Trenton Diplograptus 

 amplexicaulis beds {see stations 22-27) or the lower Dicellograptua 

 beds of Lansingburg and the Utica belt farther west. 



I 



Station 6. laveny's point, Waterford 



This locality is a small bluff on the west bank of the Hudson, 

 a little north of the bridge connecting Waterford and Lansing- 

 burg. Here are exposed steeply east dipping (50°, n 110° e) 

 intensely black, hard, indurated, argillaceous slates, overlain a 

 little farther north by gray arenaceous and micaceous shales, 

 which in turn underlie alternating sandstones and shales. The 

 black slate was found to contain: 



Climacograptus typicalis, EalV- 



Diplograptus putillus, Eall 



iD. spinulos'us sp. n. (a colony and numerous hydrorhabds) 



Endoceras proteiforme, Eall 



Climacograptus typicalis and Diplograp- 

 tus s p a n u 1 o s u s are restricted to the Utica shale, while 

 Diplograptus putillus finds its principal development 

 in that terrane. 



^Climacograptus typicalis is, according to the consensus of 

 all writers on the Utica and Normans kill faunas, restricted to the Utica 

 shale and does not occur in the latter fauna. The only exception is found 

 In Freeh's statement (54:612) that he has seen specimens of this form 

 from Normans kill in the Breslau museum. Freeh, however, also considers 

 CI. parvus a dwarf form of CI. typicalis, basing this opinion on 

 a specimen from Cincinnati in the same museum. As CI. parvus does 

 not occur at Cincinnati, but is restricted to the Normans kill beds, where 

 it is one of the most common forms, and as a comparison of these two 

 graptolites, which nowhere occur together, shows that they can not be 

 Identical, it is probable that he did not recognize the two forms, and his 

 CI. typicalis from Normans kill is only a somewhat larger specimen 

 of C 1. parvus. 



Freeh also proposes to change Hall's adjective, " typicalis " to " typicus " 

 on the ground that the former is an anglicism. While it is true that 

 typicalis is not a word of classic Latin origin, it was of common usage In 

 later Latin, and, as many very expressive words have been taken from the 

 post-classic Latin, it would not be practical to deprive the paleontologic 

 nomenclature of this source of words by too strict philology. 



