240 



NEW YORK STATE MUSEUM 



apertural process which in its best development would seem to suggest that 

 it may have served still another function than that of projecting the aper- 

 tures and have been the bearer of some separate organ or specialized indi- 

 vidual. This process and the absence of the spreading of the theca near 

 the aperture, observed in the typical form, are the principal characters dis- 

 tinctive from the latter. The two have not been found in association, but 

 are bound to different localities and faunules. 



Corynoides curtus Lapworth 



Plate 13, figures 4, 17-21 



Corynoides curtus Lapworth. Cat. West. Scottish Foss. 1876. p. 7; pi. 4, fig. 92 

 Corynoides curtus Lapworth. Belfast Nat. Field Club. Rep't & Proc. v. 1, pt 4. 



Apx. 1877. pi. 7, fig. 19 

 Corynoides curtus Ruedemann. N. Y. State Mus. Bui. 42. 1901. p. 514ft. 



Description. Rhabdosome small (6-7 mm, in the great majority 6 mm), 

 narrow (.4-5 mm), curved, consisting of a sicula and three thecae. Sicula 

 inconspicuous (in the average 1 mm long) ; short and broad, without aper- 

 tural spines. Thecae long and extremely narrow ; of uniform width, not 



diverging from the sicula ; provided with one 

 apertural spine each, which is situated on the inner 

 or upper margin of the theca and projects 

 obliquely outward. Apertural margin straight, 

 normal to the axis of the theca. Nema thin and 

 flexuous. 



Position and localities. The writer has cited 

 this form in a former publication from the Utica 

 shale at the Rural cemetery in Albany, — where it 



is found beautifullv preserved in association with 

 141 143 144 - r 



Fig. 140-44 Corynoides curtus G 1 O S S O g r. (1 U a dr i 111 U C 1' O 11 i\ t 11 S Var. COT- 

 Lapworth. Fig. 140 Copy of original >-> 1 



figure. Fig. 141, 142 Young specimens. •— 1 • . • 1 1 /"■> /w 



Fig. 143 Mature specimen. Fig. Ml II U t 11 S, L 1 1 111 a C O g 1". 1) U t 1 1 I 11 S, G . if) 



Aperture of the longer theca of the 



same. Figures 141-44, x 7 c u c h a r i s and Utica shale brachiopods, — at the 



penitential')- in Albany, at Ward's lane, north of Albany, and the Normans- 

 kill near Albany. There are in the State Museum slabs of Utica shale from 



r^ 



