TUBICOLAR ANNELIDA. 19 



scribed, was subsequently proved to be a Cornulites, the name of the former species 

 was changed by its author to Clinton/. The Cornulites arcuatui of Conrad, from 

 the Niagara limestone, in Orleans county, hears a close resemblance to speci- 

 mens of C. Clintoni, and the type may represent a small individual which re- 

 tains the substance of the tube. Mr. Conrad's specimen is not accessible, but 

 in the event of the identity of the species being proved, the specific term arcuatus 



will take precedence. 



Cornulites, sp. ? 



PLATE CXVI, FIGS. 24, 25 



This specimen has the distant, regular annuli of C. distans, but the evidence 

 of vertical striation is very obscure and unsatisfactory. The specimen is in a 

 crystalline condition, and on this account the small portion of the test remain- 

 ing preserves only obscure indications of its original condition. When examined 

 by transmitted light, there is evidence of a distinct transverse line upon the 

 ambulations, above which the ring is darker, and below more translucent, appar- 

 ently indicating the line of articulation of the joints of the tube. The apparent 

 transverse strife on the figure are due to the texture of the surface, and are not 

 organic markings. 



Clinton group. Near Lockport, Niagara county. 



Cornulites arcuatus. 



PLATE CXVI A, FIG. 9. 



nulites arcuatus, ConkAd. Jour. Acad. Nat. Sri., vol, viii, p. 27'j. pi. xvii. fig. 8. 1842. 



Niagara group. Albion, Orleans county. 



Cornulites proprius. 



PLATE CXVI, FIGS. 1-21 



proprius, Hall. Twenty-eighth Rept. N. Y. State Mus. Nat. Hist., p. 182, pi. xxxi.figs. 1-13. 1ST:'. 



The species referred to Cornulites - (==C. bcllastriata) (Pal. N. Y., vol. ii, 



he. cit.), is allied to C. proprius in its surface characters, although manifesting a 

 tendency to greater regularity in the annuli, and having finer and less prominent 

 longitudinal striatums. It may, however, properly be regarded as the New York 

 representative of the Waldron species. The species C. contractus. Ringueberg 

 (Proc. Acad. Nat. Sci., p. 148, pi. iii, figs. G, 6a, 6b, 1884), from the Niagara group 



