X BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



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Figure 8 — White ants' nest of earth in Matto Grosso, on the plains of 



the Upper Paraguay 484 



" 9 — Mound of white ants in the laterite region of Africa 486 



" 10 — Nests of white ants in Africa 490 



" 11 — White ants' nest in a tree, Sahtre Valley, State of Bahia — 492 

 Weller : 



Figure 1 — Cross-sections of the rostral portion of Camarophoria schlotheimi 



(von Buch) 499 



" 2— Cross-sections of the rostral portion of the pedicle valve, and 

 a like series of the brachial valve, of Camarojyhoria ham- 

 hurgensis n. sp 601 



** 3 — Cross-sections of the rostral portion of Camarophoria expla- 



nata (McChes. ) , 502 



" 4 — Cross-sections of the rostral portion of Tetracamera subcuneata 



(Hall) 503 



" 5 — Cross-sections of the rostral portion of Tetracamera subtrigona 



(M. & W. ) 505 



" 6— Cross-sections of the rostral portion of Rhynclwtetra caput- 



testudinis (White ) 507 



'* 7 — Cross-sections of the rostral portion of Fugnax pugnus (Mar- 

 tin) 508 



" 8— Cross-sections of the rostral portion of Allorhynchus lieteropsis 



(Winchell) 509 



" 9 — Cross-sections of the rostral portion of Allorhynchus macra 



( Hall) 509 



'' 10— Cross-sections of the rostal portion of Camarotwchia chouteau- 



ensis n. sp 510 



" 11 — Cross-sections of the rostral portion of Wilsonia grosvenori 



(Hall) 511 



" 12 — Cross-sections of the rostral portion of Leiorhynchus greene- 



a.num (Ulrich ) 511 



" 13 — Cross-sections of the rostral portion of Pugnoides ottumwa 



(White) 512 



" 14 — Cross-sections of the rostral portion of Shumardella missouri- 



ensls (Shum ) 513 



" 15 — Cross-sections of the rostral portion of Shurnardella obsolescens 



(Hall). 5J3 



" 16 — Cross-sections of the rostral portion of Rhynchopora jyustulosa 



(White) '. 514 



" 17 — Five cross-sections of the rostral portion of the pedicle valve 

 and six of the brachial valve of Rhynchopora hamburg- 

 ensis n. sp 515 



" 18— Cross-sections of the rostral portion of Rhynchopora ? cooper- 



ensis (Shumard) 516 



Blackwelder : 



Figure 1 — General map of northeastern Utah 521 



" 2 — Diagram showing the relations of the Cambrian and Algon- 

 quin quartzites 522 



" 3— Sections of mid-Carboniferous strata in the upper valley of 



Ogden River 532 



" 4 — Generalized section of the Wasatch range at Willard, Utah. . 534 



" 5— Geologic sketch map of the vicinity of Ogden, showing over- 

 thrusts and normal faults 535 



