816 



CAMBRIAN BRACHIOPODA. 



Acroireta microscopica missounetisis, described 694 



general geographic and stratigrapliic distribution tab- 

 ulated 106 



type specimen figured PI. LXVII, fig. 4 



microscopica tetonensis, described 694 



compared with Acrotrda microscopica missourieims. . . 694 

 general geographic and stratigrapbie distribution 



tabulated 106 



type specimen figured PI. LXVII, fig. 3 



minima, described 695 



general geographic and stratigrapbie distribution 



tabulated 106 



type specimen figured PI. LXXVII, fig. 7 



misera, described 695 



compared with Acrotrcta curvata 673 



Acrotrcta Icutorgai 673 



A crotreta schmalcnseei 673 



general geographic and stratigrapbie distribution 



tabulated 106 



type specimen not figured. 



Tieboensis, described 695 



compared with A crotreta marjumensis 693 



general geographic and stratigrapbie distribution 



tabulated 106 



type specimen figured PI. LXXVII, fig. 9a 



nicholsoni, described 696 



cardinal area discussed 303 



general geographic and stratigrapbie distribution 



tabulated 106 



t5T)e specimen figured PI. LXXIII, fig. 1 



" cf. nicholsoni Matley," discussed 703 



TWT, described 696 



general geographic and stratigrapbie distribution 



tabulated 106 



type specimen figured PL LXXVII, fig. 10 



f£landica, described 697 



general geographic and stratigrapbie distribution 



tabulated 106 



t^-pe specimen not figured. 



ophirensis, described 697 



cardinal area discussed 305 



compared with Acrotrcta microscopica missouriertsis . . 694 



Acrotrcta cf. ophirensis 698 



Acrotrcta ophirensis dcsccndcns 698 



Acrotrcta ophirensis rugosa 699 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



muscle scars discussed 313 



type specimen figured PI. LXXW, fig. 1 



cf . ophirensis, described 698 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



ophirensis dcsccndcns, described 698 



cardinal area discussed 305 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



tj-pe specimen figured PI. LXXVIII, fig. 1 



opliircTisis rugosa, described 699 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



type specimen figured PI. LXXIV, fig. 2a 



ovalis, described 699 



discussed 685 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



t5T)e specimen figured PI. LXVI, figs. 2, 2a-b 



pacifica, described 699 



general geogi'aphic and stratigrapliic distribution tab- 

 ulated 106 



type specimen figured PI. LXIX, figs. 6 and 6a 



"papillata," compared with ''Acrothyra signata sera" 716 



reference to A croihyra sera discussed 716, 718 



"papillata lata," reference to Acrothyra sera discussed 716,718 



"papillata prima," reference to Acrothyra sera discussed.. 716,718 



parvula, described 699 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



type specimen not figured. 



Acrotrcta primseva, described 700 



compared with Acrotrcta claytoni 681 



Oholus (Wcstonia) ella 672,674 



general geographic and stratigrapliic distribution tab- 

 ulated 106 



one of largest species 674 



stratigrapbie position mentioned 318 



type specimen figured PI. LXI, fig. 1 



"proavia," type of Acrothyra 716 



pyxidicula, described 701 



general geographic and stratigrapbie distribution tab- 

 ulated 106 



stratigrapbie distribution mentioned 674 



type specimen figured PI. LXIX, fig. 2f 



'^Tccurva," type species of Volborthia 366 



rudis, described 702 



general geographic and stratigrapliic distribution tab- 

 ulated 106 



t3T)e specimen figured PI. LXV, fig. 3f 



described 702 



compared with A crotreta bisccta 679 



Oholus ( Westonia) ella 674 



general,geograpbic and stratigrapbie distribution tabu- 

 lated 106 



type specimen figured PI. LXXIII, fig. 5b 



malverncnsis," discussed 703 



saggittalis, described 704 



compared with Acrotrcta baileyi 677 



A crotreta hellatula 678 



Acrotrcta belli 678 



Acrotrcta convexa 682 



A crotreta curvata 673 



Acrotrcta inflata 691 



A crotreta kutorgai 673 



A crotreta pacifica 700 



Acrotrcta cf. sagiitalis 706 



Acrotrcta sagiitalis magna 706 



Acrotrcta sagiitalis taconica 707 



Acrotrcta sagittalis transversa 70S 



Acrotrcta schmalcnseei 673 



Schizopholis 609 



general geographic and stratigrapbie distribution tabu- 

 lated 106 



type specimen not figured. 



cf. sagittalis, described 706 



general geographic and stratigrapbie distribution tabu- 

 lated 106 



sagittalis magna, described 706 



compared with A crotreta baileyi 677 



A crotreta ef. socialis 712, 715 



A crotreta sp. undt 715 



discussed 687 



general geographic and strati graphic distribution tabu- 

 lated 106 



type specimen figured PI. LXVI, fig. 4b 



sagittalis taconica, described 707 



compared with A crothele subsidua 633 



Acrotrcta baileyi 677 



general geographic and stratigrapbie distribution tabu- 

 lated 106 



type specimen figured PI. LXXI, fig. le 



sagittalis transversa, described 70S 



compared with Acrotrcta baileyi 677 



Acrotrcta curvata 673 



Acrotrcta kutorgai 673 



Acrotrcta sagittalis magna 706 



A crotreta schmalcnseei 673 



general geographic and stratigrapbie distribution tabu- 

 lated 106 



type specimen not figured. 



schmalcnseei, described 709 



compared with A crotreta ovalis 699 



Acrotrcta sagittalis transversa 673 



Acrotrcta seebachi 710 



Acrotrcta socialis 712 



general geographic and stratigrapbie distribution tabu- 

 lated 106 



type specimen figured PI. LXX, fig. la 



