g6 NEW YORK STATE MUSEUM 



Spathiocaris cushingi nov. 

 Plate 31, figures 3 and 4 



Two specimens of supposed Turrilepas (?) newberryi 

 (Whitfield) from the Cleveland (Olmstead) shale at Cahoon creek, 

 North Dover, Cuyahoga county, Ohio, sent to the State Museum 

 by Prof. H. P. Cushing, represent a new species of Spathiocaris of 

 peculiar character. 



In the smaller specimen the valve, which is folded upon itself 

 along the median line, is much broader than long, the width being 

 twice the length and the general outline approximately subcircular. 

 The basal margin is but little curved; the lateral margin is slightly 

 drawn in and the antero-lateral angles rounded. The anterior 

 margin is probably straight transversal or very obtusely angular. 

 Aside from the great relative width of the valve, which as in other 

 species of Spathiocaris may be only an early ontogenetic feature, 

 the strong concentric lines and a second set of lines that is con- 

 centric about the apexes of the antero-lateral angles are the main 

 characters of this species. The second set of lines extends about 

 one-third of the width of the valve on either side, ending abruptly 

 and giving the antero-lateral slope a cancellated sculpture. 



The larger specimen, while but little wider, is longer by one- 

 half. This discrepancy is in part due to the loss of the lateral 

 margins in the specimen, which therefore appears too harrow and 

 in outline resembles S. chagrinensis. The concentric lines 

 are as strong and regular as in the smaller specimen ; the second set 

 of lines, however, is but faintly shown as discontinuous nodes or 

 ridges in the depressions between the concentric striae. 



The types are in the geological museum of Western Reserve 

 University. The smaller measures 11 mm in length and about 15 

 mm in original width at the anterior end ; the larger, 16 mm in width 

 and 18 mm in length. 



Spathiocaris williamsi nov. 



Plate 31, figures 1 and 2 



Description. Valve large, broadly subrectangular, somewhat 

 asymmetric, not quite one-fourth wider than long. The apex 

 situated near the anterior margin, to the right of the median line. 

 The basal margin is nearly straight; judging from the concentric 

 growth-lines, it extended about three-fourths the width of the valve, 

 then bent abruptly upward to the gently curved lateral margins. 



