30 Moll 
VII. MOLLUSCA, 
(117). — Development of Haliotis ; Boutan (35). — Notes on embryology 
of Chiton ; Metcalf (241), the ova are fertilized after extrusion. — 
Structure and segmentation of the egg of Cyclas cornea , L. ; Stauf- 
facher (353, 354). — Embryology of Unio complanata ; Lillie (198). — 
Embryology of Ostrcea glomerata ; Kent (187). 
12. Phylogeny and Classification. 
Classification of Mollusca after Pelseneer ; Laiiille (197) ; Woodward 
(414). — Classification of Ammonites] Blake (24). — On the systematic value 
of the operculum ; Moellendorff (248). — The Streptoneura and Euthy- 
neura are connected by Actceon , which is streptoneurous ; Bouvier (36-38), 
Pelseneer (276). — Phylogeny of Oncidiidce ; Plate (296) [see also 
Zool. Bee. 1892, Moll. p. 35]. — Rhodope veranii is most nearly allied tp 
the Nudibranchiata in its anatomy, but to the Turbellaria in its develop- 
ment, and should form a new class ; Boehmig (26). — Phylogeny of 
Docoglossa ; Dall (95) replies to criticisms by Thiele. 
The Polyplacophora are finally classified by Pilsbry in Tryon (381), 
as under : — 
I. Superfam. EOPLACOPHORA. 
Fam. Lepidopleurid^e. 
Genus Lepidopleurus. 
Genus Hanley a. 
Genus Hemiarthrum. 
Genus Microplax. 
II. Superfam. MESOPLACOPHORA. 
Fam. ISClINOCHITONIDiE. 
Subfam. Ischnochitonince. 
Genus Tonicella. 
Genus Schizoplax. 
Genus Callochiton. 
Genus Trachydermon. 
Genus Chcetopleura. 
Genus Pallochiton. 
Genus Dinoplax. 
Genus Ischnochiton. 
Subfam. Callistoplacincc (nov,). 
Genus Callistochiton. 
*• Genus Nuttallina. 
Genus Craspedochiton. 
Genus Angasia. 
Genus Callistoplax. 
Genus Ceratozona. 
Fam. Mopaliid.® (nov.). 
Genus Mopalia. 
Genus Placiphorellti. 
Genus Plaxiphora. 
