ORDER III TELEODESMACEA 411 
cardinals and a pair of lateral laminae in each valve, the anterior laminae often absent, 
and the posterior frequently closely adjacent to the resiliwm, 
simulating cardinals. One Cretaceous, and a number of 
Tertiary and Recent species. 
Erycina (Lam.), Fischer (Fig. 750); Kellia, Turton ; 
Pythina, Hinds; Lasea, Leach; Lepton, Turton ; Erycinella, 
Conrad ; Spaniodon, Reuss; Fabella, Conrad., etc. Tertiary 
and Recent. 

Family 23. Galeommidae. Gray. 
Fia. 750. 
; ‘ : : 
ell w t rcept epidermis ; valves equal, free 
Shell without a perceptible epidermis ; valves equal, free, Lticictim pelhundes. Taw 
widely gaping ventrally, smooth, or variably sculptured ; Calcaire Grossier; Parnes. B, 
‘ ; peta hae ee vals mallinl Jim» Hinge of E. Foucardi, Desh. 
adductor scars distant, oval ; pallial line ae aoeneaness “Eiérouval: 
simple ; ligament usually obsolete, .resiliwm Cent enlarged (after De- 
: 5 shayes). 
internal, sub-umbonal, or oblique, attached os) 
to an excavated chondrophore in each valve; hinge plate hardly 
developed ; laterals obscure or absent ; one or two cardinal teeth in 
each valve or none. Tertiary and Recent. 

Scintilla, Desh. (Fig. 751); Galeomma, Turton; Passyia, 
Sportella, Desh.; Hindsiella, Stol.; Ephippodonta, Tate, ete. 
Tertiary and Recent. 
Fie. 751. 
Seintilla Parisiensis, 
Desh. Upper Eocene ; 
Auvers, near Paris. 2/3 j ‘ 
(after Deshayes). Family 24. Chlamydoconchidae. Dall. 
Shell cellulo-crystalline without an epidermis, comprising the prodissoconch with 
narrow, long laminar accretions, very small ; valves wholly internal, not connected, con- 
tained in laterodorsal separate capsules, without hinge or hinge plate, not attached to 
muscles or ligament ; ligament absent, resilium separately encapsuled between the obsolete 
valves, functionless. Recent ; California. 
The genus Chlamydoconcha, Dall, is evidently the last term in a series beginning 
with forms like Lepton, and continued by Galeomma and Ephippodonta, but the 
specialisation has been carried so far that it may well be regarded as the type of 
a distinct family. 
Family 25. Kelliellidae. Fischer. 
Shell with a periostracum ; valves equal, free, closed, smooth externally with plain 
margins ; pallial line simple; area obscure or none; ligament external, parivincular ; 
resilium external or slightly sunken; hinge plate narrow, entire, with one or two 
cardinals, and a single anterior lateral placed above the anterior cardinal tooth. Tertiary 
and Recent. 
Kelliella, Sars; Lutetia, Desh.; ? Allopagus, Stol.; Turtonia, Forbes. Eocene to 
Recent. 
C. CycLODONTA. 
Teeth arched, springing from below the hinge margin, with the hinge plate obscure or 
absent. 
Superfamily 9. CARDIACEA. Lamarck. 
Lobes of the mantle free behind the siphons, foot elongate, geniculate ; sculpture of 
the shell chiefly radial ; cardinal teeth conical, the lateral laminae short, distant from the 
cardinals. 
