88 GINGLYMACONCHA. VENERIDZ. 
midi. Dentes cardinales duo, minimi in 
utraque valva ; dente posteriore in sinistra 
complicato ; duobus in dextra simplicibus ; 
lamellze laterales elongatze compressz lamel- 
HifOTMies os 35. Cycuas. 
Testze spheericee ; eee one ore 45. 
lulum ante testze medium locati. Dentes 
cardinales duo, simplices in utraque valva, 
lamellze laterales breves compressze lamelli- 
formes so) 2 36. EuG esa. 
Testze eee Eubieieneate Bode: 
obtuse ; umbones pone teste medium lo- 
cati. Dentes cardinales duo, sequales mi- 
nimi in utraque valva; posteriore in valva 
sinistra lobato. Lamellee laterales ae 
compressee lamelliformes...... . 37. PERA. 
Testze cordiformes; umbones pone Bore me- 
dium locati. Dentes cardinales simplices 
minimi in utraque valva. Lamellee latera- 
les lamelliformes subcompresse ........ 38. Corputa. 
Genus 34. AUTONGOE. 
The shells ovately globose ; the umbones central, prominent 
and obtuse, in each valve two simple cardinal teeth, with a 
compressed lamina before and behind them. 
The tracheal tubes are only joined at their base, equally long, 
the upper one narrowest, the foot broad and compressed. 
AUTONOE RUBRA. 
Shell purple red, smooth, transparent, internally deep shinmg 
purple. Length one-eighth of an inch. 
Cardium rubrum, Mont. Test. Brit.9; M. §& R. Trans. Linn. 
Soc. 66; Dill. Dese. Cat. 131. 
Tellina rubra, Flem. Edinb. Encycl. vu. 93; Turt. Conch. 
Dict. 168. 
