■2:M 



Camahotcechia dotis. Hall. (Fig-. 141.) (I'al. N. Y., 

 Vol. IV., p. 344. PI. LIT.) 



Distinguishing Characters. — Snl)-trian*iiilarly f)vate out- 

 line; rounded or .semi-trnncate front: 

 shallow sinus and moderate fold ; plica- 

 tions rounded or sub-angular, about 

 eighteen in number (in full-grown speci- 

 mens ), those of the gibbous brachial 

 valve abru^Dtly curved down to the pedi- 

 cle valve: plications, commonly three or 

 four in the sinus and four or five on the 

 fold. 



Found in the Encrinal limestone, at Section 5 (rare) ; Nau- 

 tilus bed, in Avery's Creek and north shore sections (abun- 

 dant); Strophalosia bed (?), in Erie Cliff. 



Camarot(ECHIa coxGiJEriATA. (Courad.) (Fig. 141 A.) 

 (Pal. N. Y., Vol. IV., p. 841, PI. LIV.) 



Distinguishing Cliarncters. — R()bust character ; abrui)t 

 curvature of sides; modei"ite fold and sinus; conspicuous 



Fig. 141. Cuniurottechia 

 dotis. Dorsal view of a 

 eliaracteristie specimen, 

 from the Nautilus bed. x t>. 

 (Original. ) 



Fig. 141 a. Camarotcechia congregata. Profile, cardinal, front, dorsal, and ventral 

 views of an individual (from Hall.) 



character of sinus at the front: three or four plications in 

 sinus and four or five on mesial fold. 



Found in a Calcareous band in the Hamilton group, at 

 Alden, Erie Co. (Hall); and at Eighteen Mile Creek. (Coll. 

 Am. Mus. Nat. Hist. New York.) 



