ABT. 9 NEW CAMBKIAN CKUSTACEA — KESSER 17 



Fase 



Fig. 3. A third somewhat larger right valve with the cast of the exterior 



of the left shown in the upper front corner. Note the large 



spines along the dorsal line. Paratype, Cat. No. 80485, U.S.N.M. 



Lower Cambrian, Eager formation; (loc. 67g) near Cran- 



brook, British Columbia. 



Tuzoia nodosa, new species 10 



4 (X 2). Small right valve. Note the very large dorsal spines and 

 those on the keel. Holotype, Cat. No. 80486, U.S.N.M. 



Lower Cambrian, Eager formation; (Loc. 67g) near Cran- 

 brook, British Columbia. 



Anomalocaris pennsylvanica, new species 12 



6 (X 2). Side view of animal. Specimen poorly differentiated from 

 rock hence the poor illustration. Holotype, Cat. No. 80487, 

 U.S.N.M. 



Lower Cambrian, Kinzers formation; (loc. 12x) near Rohrers- 

 town, Pennsylvania. 



Plate 6 



Protocaris marshi Walcott 12 



Fig. 1. Unretouched photograph of the single specimen. 



2. Retouched photo of same, to bring out certain features that may 



be seen only by turning the specimen at various angles to the 

 light. Holotype, Cat. No. 15400, U.S.N.M. 



Lower Cambrian; (Loc. 25) Georgia, Vermont. 

 Tuzoia praemorsa, new species 10 



3. Valves flattened into one plane. Distal portions beyond keel 



folded underneath. Note how the broad keel spines unite to 

 form a wide frill. Surface covered with fine pseudomorphic 

 needle crystals. Holotype, Cat. No. 80488, U.S.N.M. 



Middle Cambrian, Burgess shale; (loc. 35k) near Field, 

 British Columbia. 

 Tuzoia spinosa, new species 10 



4. Fragments of two valves. Keel spines on right-hand specimen 



preserved in unremoved matrix, overhanging outer portion of 

 shell. Rock bright red and hence difficult to photograph. 

 Holotype, Cat. No. 80489, U.S.N.M. 



Lower Cambrian, Eager formation; (loc, 67g) near Cran- 

 brook, British Columbia. 



Plate 7 



Tuzoia? dunbari, new species 11 



Fig. 1. Impression of exterior of valve. Note the extraordinary spines. 

 Reticulations faint and difficult to photograph because outlined 

 in bright yellow. Holotype, Peabody Museum, Yale Uni- 

 versity, No. 10046. 



Lower Cambrian, Kinzers formation; (loc. 12x) near Rohrers- 

 town. Pa. 



62996—29 2 



