390 G. II. Girty — Fauna found in the Devonian 



L. spatulata. Such can scarcely be the case, and I have found 

 both species associated in the Styliola layer of the Genesee. 

 As mentioned in another place, Prof. J. M. Clarke informs me 

 that in New York an elongate and slender spatulate Lingula 

 occurs in the higher layers of the black shale which appear 

 after the introduction of the normal Portage fauna, and that 

 these black shales, especially in the western part of the State, 

 are often confounded with the true Genesee. Some of the 

 punctate Lingulas from New York which I have examined 

 may possibly come from these beds, which would give the 

 species a range through the Genesee and Portage horizons. 



In Kentucky, L. Williamsana is considerably larger than 

 L. spatulata, but the individuals which I have examined from 

 New York are small. They can, however be distinguished by 

 their punctate shell and difference in shape, being more square 

 before and behind than L. spatulata, which, though subject to 

 some variation in this regard, generally tapers more in both 

 directions. The punctate shell structure, however, serves to 

 distinguish them at a glance, especially in exfoliated specimens 

 where in L. Williamsana the punctse are a striking character, 

 while the surface of L. spatulata is very smooth and shiny. 



In point of shape, L. Williamsana closely resembles L. 

 punctata Hall, but it is a much smaller shell, without the sur- 

 face ornamentation of L. punctata, which in turn has not the 

 punctate shell of L. Williamsana. It is also comparable in 

 point of shape to L. compta Hall and Clarke of the Hamilton 

 group, but that species also appears to be impunctate. 



I take pleasure in naming this interesting species after Prof. 

 H. S. Williams of Yale University , whose name is so honorably 

 connected with the study of our Devonian faunas. 



Associated with the above in large numbers is a minute 

 Lingula whose specific relations have not been made out. They 

 may be referable to L. spatulata or on the other hand be the 

 young of L. Williamsana. 



Meristella cf. Haskinsi Hall. 



Meristella Haskinsi Hall, 1860. Thirteenth Kep. New 

 York State Cab. Nat. Hist., p. 84:. 



Meristella Haski?isi RslW, 1867. Pal. New York, vol. iv, p. 

 303, pi. 50, figs. 1-12. 



In the collection are found two imperfect specimens of Mer- 

 istella, characterized by being probably subcircular in outline, 

 rather strongly arched, and lacking both fold and sinus, or at 

 least having them very faintly expressed. The size indicated 

 by the specimens is from 18 mm to 23 mm in length. These charac- 

 ters are suggestive of M. Haskinsi of the Hamilton group of 

 New York. 



