ANATOMY, PHYSIOLOGY, ETC. 
Moll 35 
12. Phylogeny and Classification. 
Phylogenetic affinities of Mollusca ; Thiele (437). 
J hering (200) has modified his system of classification of the Mollusca , 
which he now summarizes as follows : — 
Mollusca, Cuvier. 
I. Phylum Arthromalakia, von Jher. 
1. Class Amphineura , von Jher. 
2. Class Acephala , Cuvier. 
3. Class Cephalopoda , Cuvier. 
4. Class Solenoconchce, Lacaze-Duth. 
5. Class Cochlidce , von Jher. 
1. Order Orthoneura , von Jher. 
2. Order Chiastoneura , von Jher. 
3. Order Heteropoda, Lamk. 
II. Phylum Platymalatua, von Jher. 
1. Class Ichnopoda, von Jher. 
1. Order Nudibranchia , Cuvier. 
1. Suborder Phanerobranchia , von Jher. 
2. Suborder Triaula , von Jher. 
2. Order Sacoglossa, von Jher. 
3. Order Pleurobranchia , von Jher. 
4. Ordor Tectibranchia , Cuvier. 
5. Order Branchiopneusta , von Jher. 
6. Order Ncphropneusta , von Jher. 
2. Class Pteropoda, Cuvier. 
This classification is yet more fully set forth in a phylogenetic tree. 
Phylogeny of Jurassic Belemnites ; Pavlow, (316) pp. 272-276. — 
Phylogenetic relationships of the species of Polymorphidce and of the 
Amaltheidce from the Inferior Oolite ; Buckman (51).— A scoceratidce and 
Litnitidce ; Lindstrom (232). — Tentative classification of Litnitidce ; 
Remel^ (362). — Proposed classification of slugs ; Cockerell (62). — 
Classification of American land snails ; Pilsbry (339). — Phylogeny and 
classification of the Nudibranchiata Cladohepatica ; Bergh (17). — Classi- 
fication of Cryptobranch iate Dorididce : Bergii (18). — Phylogenetic rela- 
tionships of the Tertiary species of Galeodoliidce , Doliidce, Ficulidce f 
Naticidcc, Scalariidce, Aclidce , Cassididce, Terebridce , and Pusionellidce, from 
Piedmont ; Sacco (376). 
Classification of Pleurotomidcc ; Hoernes & Auinger (190). — Classifi- 
cation of Rhipidoglossa and Docoglossa ; Tryon (442) : of Helicidce ; id. 
(443). 
Pelseneer, in 1889, published a preliminary account of his proposed 
phylogenetic classification of the Pelecypoda , taking the gill-structure 
