XII LIST OF ILLUSTRATIONS. 



Page. 

 Gnomonic projection of the forms on Creedite 423 



Acanthaegilips brasiliensis Aehmead. Dorsal view of thorax, side view 434 



Zamischus brasiliensis Ashmead. Dorsal and side view of body and antenna. .. 438 

 Dieucoila subopaca Ashmead. Wing, antenna and face at same magnification. . 440 



Details of Odonteucoila chapadae Ashmead 441 



Details of Trissodontaspis rufipes Ashmead 443 



Details of Zaeucoila unicarinata Ashmead 445 



Details of Promiomera filicornis Ashmead 446 



Tropideucoila rufipes Ashmead 448 



Details of Acantheucoela armata (Cresson) 450 



Leptotrichus pitlieri, new species. A, second antenna; H, head; T, telson; 

 U, uropod; X, tip of telson enlarged, showing ornamentation characteristic 



of entire body 460 



Aegathoa lazzari, new species. M 1 , first maxilla; M 2 , second maxilla; Mp, 



maxilliped; T, telson; U, uropod 461 



Original form of the Troup meteorite (in part restored). Absent parts are 



shown in dotted lines 472 



Outlines of sections of grains of iron and of pyrrhotite from the Troup meteorite 

 as seen on a polished surface of the stone. The closely shaded areas represent 



pyrrhotite, while the light shaded areas represent metallic iron 474 



Stereographic projection showing the common forms occurring on datolite, 

 plotted in the Dana orientation. The symmetry is expressed by the falling 



of the forms in vertical zones 480 



Stereographic projection showing the same forms as Fig. 1 but plotted in the 

 Goldschmidt orientation. The poorer expression of the symmetry is appar- 

 ent 481 



Orthographic and clinographic projections showing a crystal of type 1, this 

 being the development of most frequent occurrence at Westfield. Ortho- 

 graphic and clinographic projections of crystal 2, prismatic by elongation 



on the a axis 482 



Orthographic and clinographic projections of symmetrically developed dato- 

 lite crystal of the acute habit designated type 2 by Kraus and Cook. A 

 commonly occurring habit at Westfield. Orthographic and clinographic 

 projections of a symmetrically developed crystal of the prismatic type with 

 large development of a, designated type 3 by Kraus and Cook. Shows 



unusual form 483 



Clinographic projection of a datolite crystal of type 4 habit showing the char- 

 acteristic positive and negative orthodome zone 484 



Orthographic and clinographic projections of crystal 28. An unusual habit 

 with the steep pyramidal form of type 2 but with an orthodome series in- 

 cluding (205) as in crystal of type 4. Orthographic and clinographic pro- 

 jections of crystal B9 showing unusual pyramidal form 485 



Portion of crystal B7. Clinographic projection showing new forms 486 



Orthographic and clinographic projections of crystal B5, showing unsymmet- 



rical development 493 



Orthographic and clinographic projections of crystal 10 showing form and 

 development; also the forms (167) (205) and the vicinal form. Orthographic 



and clinographic projections of crystal 51 showing the new forms 494 



Clinographic detail of crystal 41 showing the new forms. Clinographic 

 detail of crystal 10 showing rare and new forms. Clinographic detail of 

 portion of crystal 44 showing new form. Clinographic projection of crystal 

 43 showing unusual form 495 



