380 



Plate VI b. 



Vifi. 1 a. ThalanioporeUd liozieri (Xud.^, vav. proininens 

 n An irrc'milarly jointed colony. X 12. 

 The same form. X 40. 



Zoa-cia and an avicularium of the same 

 form, lateral view. X 40. 

 An operculum of the .same form. X 75. 

 The .same form from tlie basal surface. X 40. 

 Spieula of the same form. X 200. 

 Thalanioporellii liozieri iAud\ var. cali- 

 fornica n. X 40. 



Ofccia of the same form, of which tlie dis- 

 tal only appears as a rudiment. The distal 

 gonozotrcium is furnished with an oper- 

 culum. X 40. 



Chitinous thickenings on the gonozooecial 

 operculum. X 100. 



The same form from the basal surface. 

 X 40. 

 — 3 a. Thalamoporella liozieri lAud.), var. sparsi- 

 piinctala n. X 40. 



1 1). 

 1 c. 



Id. 

 1 ' 



1 f. 

 2: 



2 b. 



2e. 



2d. 



1-ig 3 



— 4 



— 5 



— 5 



— 5 



1). The .same form from the basal .surface. 



X 40. 

 a. ThalamoporcUn lioticha (Ortm i. A row of 



zoiveia, from the ba.sal surface. X 2;{. 



a. Thalaiiii>i>i>rclla I'.rixmsii n sp. X 17. 



b. Opereuluni of the same species. X 40. 



c. The same species from the basal surface. 



X 17. 



d. An avicularian mandible of the same spe- 

 cies. X 40. 



e. Spieula of the same species. X 200. 



a. Thalamoi>orclla falcifera (Hiuck.s). X 40. 



b. The same species from the basal surface. 

 X 40. 



c. An avicularian chamber of the .same spe- 

 cies. X 55. 



d. An avicularian niaudible of the same spe- 

 cies. X 75. 



c. Spieula of the same species. X 200. 



