304 
PALAEONTOLOGY OF NEW YORK. 
Surface marked by fine, concentric striae, which become fascicled and form 
strong undulations on the anterior end of the shell. The striae are acutely 
recurved on passing the umbonal ridge. Interior unknown. 
Three specimens measure respectively, 75, 63 and 55 mm. in length, and 
28, 25 and 22 mm. in height. 
Compared with G. carinata the anterior end is proportionally shorter, the 
sinus more oblique, the posterior end narrower, and the recurving of the striae 
over the umbonal ridge is much more abrupt. 
The specimen fig. 18 of plate xliv is the typical specimen figured by Yanuxem 
loc. cit. 
Formation and localities. In the Chemung group, near Owego, Binghamton 
and Chemung Narrows, N. Y. 
Goniophora subrecta, n. sp. 
PLATE XLII, FIGS. 14, 15; ANI) PLATE XLIV, FIGS. 19, 21. 
GoniopJiom Chemungensis (Vanuxem), Hall (in error). Pal. N. Y., vol. v, pt. 1. Plates and Explanations : 
PI. 44, figs. 19, 21. 1883. 
Shell large, trapezoidal; length more than twice the height; basal margin 
gently curving, with a slight sinuosity anterior to the middle; posterior 
margin obliquely truncate, very gently curving; cardinal line straight, par¬ 
allel to the base, having a length of less than two-thirds the entire length of 
the shell; anterior end gradually declining from the beak, abruptly rounded 
below, and limited by an obscure sinus, which reaches the base at about the 
anterior third. 
Valves moderately convex below the umbonal ridge, scarcely gibbous in 
the umbonal region ; cardinal slope broad and essentially flat. 
Beaks sub-anterior, small and closely incurved. Umbo prominent; umbo¬ 
nal ridge angular, slightly curving downward and extending to the post- 
basal extremity. 
Test concentrically striated. The striae above the ridge are simple and 
continuous, and below they are aggregated into fascicles. Interior unknown. 
