164 
MOLLUSCA. 
Hydrocena turhinataj sp. n., Gassies, Act. Soc. L. Bord. xxviii. p. 195, 
New Caledonia. 
Georissa liratida and hlanfordiana, spp. nn., Stoliczka, J. A. S. B. xl. 
pp. 167 & 168, pi. 6. figs, 6 & 6, Moulmein. 
Chondrella, g. n. No tentacles, eyes immersed in the head j shell globose- 
conic, aperture roundish, peristoma simple, not connected j columella with a. 
callosity. Types, C. {Cyclostoma) parvum (Pease) and minutissimum (Sow.), 
Pease, P. Z. S. 1871, p. 406. Ch. striata, sp. n., lioratonga, id. ibid. p. 477. 
SOLENOCONCHiE. 
Dentalium subtor quotum, sp. n., Fischer, J. de Conch, xix. p. 218, Suez. 
LAMELLIBHANCHIATA. 
Recluz (Act. Soc. L. Bord. xxvii. pp. 29-34) proposes the 
following classification : — 
Subclass DIMYARIA. 
Order Disiphoniphora. 
Suborder Seoliephora. 
Tribe Crateromonaria. 
Section. Ligament absent or external. Families : Aspergillidae, 
Pholadidae, Gastrochsenidae, Solenidae, Panopidae, Glyci- 
meridae. 
Section, Lig. internal. 
Subsection. Inequivalve. Families : Ceromydae, Myadae, 
Pandoridae, Anatinidae. 
Subsection. Equivalve. Families ; Mactradae, Amphides- 
midae. 
Tribe Craterodimaria. 
Section. Lig. int. Families: Lavignonidae, Mesodesmidae, Le- 
didae. 
Section. Lig. ext. Families : Malletiadae, Tellinidae, Psam- 
mobidae, Tapesidae, Veneridae, Cyrenidae, Iridinidae. 
Suborder Ascoliephora. 
Tribe Craterodimaria. Family Eucharidae. 
Tribe Crateromonaria. 
Section. Shell regular. 
Subsection. Lig. ext. Families : Cycladidae, Dreissenidae, 
Cardiadae, Tridacnidae, Lucinidae, Erycinidoe. 
Subsection. Lig. int. Families : Galeommidae, Solenomyidae. 
Section. Shell irregular. Families ; Chamidae, Rudistidae. 
Order Monosiphonophora, 
Tribe Craterodimaria. Family Venericardidae. 
Tribe Crateromonaria. 
Subsection. Lig. int. Families : Crassatellidae, Scacchiadae. 
Subsection. Lig. ext. Families : Carditadae, Ungulinidae, 
Mytilidae, Unionidae. 
Order Asipiionophora. 
Section. Shell reg. Families: Trigoniadao, Nuculidje, Arcadae. 
Section. Shell irreg. Family Etheridae. 
