PLATE 11 



Goiiyai(Jii.r tridcauilia Jiirg. 



All from specimens from Loriiig, Alaska, September 15, 1905. 



Fig. 11. Antapical view of hypotheca. X 1000. 



Fig. 12. Diagram of apical view of epitheea. X 1000. 



Fig. 13. Ventral view of theea, with plates and surface markings. 

 From an empty theca. X 1000. 



Fig. 14. Lateral view of same. X 1000. 



Fig. 15. Dorsal view of same, showing plates and thickness of wall. 

 Note solid antapical spines. X 1000. 



ABBREVIATIONS 



1-6 — girdle plates. 

 l'-4' — apical plates. 

 1"-S" — anterior dorsal intercalaries. 

 J "-6" — precingulars. 

 i"'-6"'— postcingulars. 

 IP — posterior intercalary. 

 1"" — antapical. 

 a. sp. — antapical spines. 

 ant. pi. — anterior plates of ventral 

 area. 



cJ. pJ. — closing platelet. 



f. — fin on margin of ventral area. 



ff. po. — flagellar pore. 



int. pi. — -intermediate plates of ven- 

 tral area. 



/. — list of ventral area. 



post. pi. — posterior plate of ventral 

 area. 



r. a. — ventral area. 



r. po. — ventral pore. 



Figures drawn by C. A. Kofoid, R. W. Harvey and Mrs. Josephine 

 Rigden Michener. 



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