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Camarotoechia On[[?]]talis Mingan Islands Small, 3 ribs in deep sinus, strong L ribs, 4 ribs on flanks. L. 16, @ 16 figure 1041 F. 3 views Several specimens with 4 ribs in salens, & 5 on flanks. May be another species 1041a, b, d, R, 1041 Specimens with 4 ribs are wider than those with 3 & have a more convex dorsal valve. Select 1041b for type L 16, W 19 Flanks of 4 ribs sinus very flaring [[strikethrough]] slides [[/strikethrough]] spiral L obtuse, one with 3 ribs is acute. Beak of 3 ribs more acute. 4 views each, Hebertella borealis 1035c Type specimen, broken, dorsal side strongly convex, sinnate to margin, strong ribbed. 5 in 10 at front. Apsacline, narrow delthynium Cardinal extremities deflected strongly dorsally. Doyals lateral slopes very steep towards the cardinal extremities. Ventral valve flattened with very gentle lateral slopes. Type L 35, W 42. Ribs become very fine on flanks 28 ribs on ventral side of type A large specimen 1035a suggests H. imperator. It is L. 44, W 50