106 CANADIAN MICRO-PAL. I-^ONTOLOGY. 



Shell, thin-walled, smooth, collar stricture not apparent. Cephalis 

 sub-spherical, hyaline, without pores. Thorax inflated sub-spherical, 

 with regular circular pores, about as wide as the bars, in twenty 

 oblique rows. Mouth constricted, only oue-third as wide as the thorax, 

 without peristome. 



Dimensions : — Cephalis, 0-053 mm. long. 





n 



0-045 



It 



broad. 





Thorax, 



0-151 



ii 



long. 





ti 



0-147 



ii 



bi-oad. 





Mouth, 



051 



II 



in diameter 



Occurience : 



frequent. 









6. DiCTYOCEPHALUS MACROSTOM4, n. sp. 



Plate XV., fig. 1. 



Shell thin-walled, smooth, without collar stricture. Cephalis subspheri- 

 cal, hyaline, without pores. Thorax, roundish urceolated with regulai- 

 circular pores about as wide as the bars, in fifteen to sixteen oblique 

 rows. • Mouth less constricted than in the former species ; two-thirds 

 as wide as the thorax, without peristome. 



Dimensions : — ^Cephalis, 0-051 mm. long. 





II 



0-042 



II 



l)r()ad. 





Thorax, 



0-153 



II 



long. 





II 



0-127 



II 



broad. 





Mouth, 



0-083 



II 



in diameter 



Occurrence : 



very frequent. 









Family : Theocyrtida. 

 Sub-family : Theocorida. 



Genus : Theocampe, Haeckel. 

 7. Theocampe sppl^rocephala, n. sp. 



Plate XV., fig. 2. 



Sliell wide bottle shaped, thin-walled, with two distinct strictures. 

 Cephalis spherical, hyaline, without pores. Thorax campanulate, with 

 three transverse rows of circular pores. Al)domen inflated with from 

 eight to nine obliquely descending rows of circular pores. Mouth 

 but little constricted, two-thirds as wide as the abdomen. Ratio of 

 the thi-ee joints to each other : length, 1:2:4; breadth, 1:3: 6. 



