614 NEW YORK STATE MUSEUM 



given, we have been altogether unable to acquire positive indi- 

 cation of crustacean structure in any of them. 



In this connection I take opportunity of referring to a body 

 from the upper Devonic, which has the aspect common to all 

 these genera, the tenuous shield concentrically striated, but 

 a size which greatly surpasses them. On an accompanying plate 

 is figured such a specimen taken from the upper layers of the 

 Portage group in the Tannery gully at Naples, a horizon which 

 has produced a number of singular objects, Paropsonema 

 cryptophya, some undescribed gephyrean worms and other 

 unrecorded occurrences. This object is one half of a singly cleft 

 shield resembling a circular Spathiocaris or Cardiocaris. 



In the collections of the state museum there has been for 

 many years a plaster cast, and among the archives a pencil 

 sketch, of a large discinoid body taken from the Ithaca beds 

 of the upper Devonic (Portage stage) at Truxton, Cortland co., 

 both cast and drawing sent to the late Prof. Hall by the late 

 Rev. H. A. Riley of Montrose Pa., a well known collector and 

 student of fossil organisms. It will be observed from the 

 accompanying figure of this body that the furrow which crosses 

 the surface of the body is accidental, not natural, as it not only 

 divides the body into unequal parts but is crossed by the concen- 

 tric rings of growth. The body was originally depressed conical, 

 as shown by the irregular wrinkling of the surface under com- 

 pression, the beak being well forward of the center and the con- 

 centric lines conspicuous but not relatively so to the size. The 

 dimensions of this object are specially noteworthy; fore and aft 

 it was not less than 5 inches long and transversely through the 

 center nearly 6 inches. The Naples shield has just about the 

 same dimensions. Either of these bodies by itself fails to 

 explain its true nature; taken together, I am disposed to believe 

 that all the evidence indicates that the one is probably the cor- 

 relate of the other, one a pedicle valve, the other a brachial 

 valve of a great inarticulate brachiopod like Eunoa. We should 

 probably go astray in identifying this great shield generically 

 with Eunoa from the Melrose graptolite beds; and in view of 



