THE SARCODINA III 



Order 16. CYRTOIDIDA. Similar to the preceding, but without the sagittal fur- 

 row. The skeleton is helmet-shaped. Families : Tripocalpidae ; Phaenocalpidae ; 

 Cyrtocalpidae ; Tripocyrtidae ; Anthocyrtidas ; Sethocyrtidae ; Podocyrtidas ; 

 Phormocyrtidae ; Theocyrtidas ; Podocampidae ; Phormocampidae ; Lithocampidas. 



Legion 4. PHJEODARIA (or CANNOPYLEA). The central capsule has a double 

 membrane, with a spout-like main opening at one pole, and frequently with 

 accessory openings on each side of the main axis at the opposite pole. The 

 central capsule may be multiple in number. There is always a pigmented mass 

 on the outside of the central capsule (the phceodium) and covering the main 

 opening. The skeleton, which is rarely absent, is silicious and always outside 

 of the central capsule. 



Order 17. PH^OCYSTINIDA. Skeletal structures may or may not be present; 

 the central capsule is the centre of the spherical body. Families : Phaeodinidae ; 

 Cannoraphidae ; Aulacanthidae. 



Order 18. PH^OSPHERIDA. The skeleton is a simple or a double latticed cover- 

 ing; the central capsule is in the centre of the shell. Families: Orosphaeridse ; 

 Sagosphseridae ; Aulosphaeridae ; Cannosphaeridae. 



Order 19. PH-ffiOGROMIDA. Radiolaria provided with a simple latticed shell, 

 having a mouth opening at one (the main) pole. The central capsule is in the 

 aboral half of the shell. Families: Challengeridae ; Medusettidae ; Castanel- 

 lidae ; Cercoporidae : Tuscaroridae. 



Order 20. PELffiOCONCHIDA. The shell consists of two latticed valves, one dorsal, 

 the other ventral (right and left according to Butschli). Families: Con- 

 charidae ; Cselodendridae ; Caslographidse. 



SPECIAL BIBLIOGRAPHY III 



Brady, H. B. Report on the Foraminifera dredged by H..M. S. Challenger: Chal- 

 lenger Reports, Zool., IX., 1882-4. 



Brandt, K. Koloniebildenden Radiolarien (Sphaerozreen) des Golfes von Neapel : 

 Fauna and Flora, 1885. 



Butschli, 0. Protozoa; Sarcodina. In Bronn's Klassen und Ordnungen des 

 Thierreichs. Leipzig. 1883. 



Carpenter, W. B. Introduction to the Study of the Foraminifera: Ray Society, 

 London, 1862. 



Haeckel, E. The Radiolaria: Challenger Reports, Zool., XVII. and XVIII., 1888. 



Hertwig, R. Der Organismus der Radiolarien. Denkschrift. Jenaisch. Akad., II., 



1879- 

 Hertwig und Lesser. Ueber Rhizopoden und denselben nahe stehende Organismen : 



Arch. f. mik. Anat. Bd. X., Suppl., 1874. 



Leidy, Jos. Fresh-water Rhizopods of North America. Washington, 1879. 

 Pnard, Eug. FJudes sur les rhizopodes d'eau douce : Mem.phys. hist. nat. Geneve, 



XXXI., 1890. 



