ORAPTOLITES OF NEW YORK. PART 1 737 



Dr Gurley noticed in the collection from the Beekmantown shales of 

 Point Levis, Canada, and the Upper Beekmantown of Summit in Nevada, 

 small, ^vinged bodies in great number, which he referred to this genus, 

 arranging them in three specific groups. One of these he considered identical 

 with the genotype, C. wrightii. Gurley holds now that Avhat hitherto 

 has been described as Caryocaris are only appendages, and that the complete 

 body [text fig.103] consists of "two symmetrically paired lateral appendages 

 attached to the distal end of a single median proximal 

 portion on which [he believed] thecae could perhaps be 

 traced.'' It is stated at the end of the generic description 

 that " it is needless to add (as Lapworth points out) that 

 it is not, as Salter supposed, a crustacean, but from its 

 resemblance to Dawsonia appears to be a graptolite."^^ 



Our Dee]i kill specimens of Caryocaris [pl.l7| fail 

 to show either the more complicated structure, observed Fig. 103 caryocaris 



, ^ - ,, . ,• ii T i wrightii Salter. From 



bv Gurlev, or anythiuff suffe'esting tnecae, hut appear the upper Beekmantown 



J J ' •' ~ ~o o ' i i ot Nevada. x2 (Copy 



as nothing but pyriform bodies truncate at one end and ^""omr.une.^) 

 bluntly acute at the other. One margin of one of the figured sj^ecimens [fig.l7J 

 has a distinctly raised I'im on one side "which gives the impression of being the 

 result of a fracture through a part of the test, folded on itself. Our largest 

 and best preserved specimen is 7 . 2 mm long and 2 . 8 mm wide. It has, hence, 



' We have not been able to find wliere Lapworth has expressed this view, but 

 noticed that in 1876 [Catalogue of "Western Scottish Fossils, p 7] Dawsonia is still 

 cited among the crastaceans by this eminent authority on graptolites. 



^ Jones and \yoodward have figured in their Monograph of the British Phyllopods 

 a specimen of C. wrightii [pt 2, 1892, p.91, fig.6] which they had received from 

 Prof. C. Malaise and which appears to retain a trifid tail partly extruded below the nar- 

 row extremity. They conclude on this evidence that, in this crustacean, style and stylets 

 were all three dagger-shaped. It is obvious that the views of the Uritish authors and of 

 Gurley are greatly at variance ; and our material consisting only of the podlike bodies 

 does not permit us to select between the conflicting opinions. We suspect, however, 

 that the supposed caudal appendage of Caryocaris and the trifid bodies here assigned to 

 Dawsonia monodon Gurley are identical. 



