LAMELLIBRANCIIIATA 119 



ORDER SIPHONIDA. 



No. 309. Teredo amphistaena, Goldf. 



Type genus of the family Teredidae. From the Upper Chalk of Kent, 

 England. 



No. 310. Panopaea Jurassi, d'Orb. 



This genus belongs to family Saxicavidoe, and dates from the Jurassic, with 

 140 fossil species. Oolite, Bayeux, France. 



No. 311. Pholodomya Aequalis, Sow. 



Calcareous Grit (Middle Oolite). Weymouth, England. 



No. 313. Tellina (Arcopagia) Texana. 



The type genus of the family Tellinidae, and widely distributed since the 

 Jurassic. 170 species fossil, 300 living. Cretaceous, Comanche Hills, Texas. 



No. 313. Venus laevigata, Nyst. 



The family Veneridse, to which this genus, the common clam, belongs, is 

 the most typical of the class; 200 species are found fossil since the Jurassic. 

 Miocene, Grignon, France. 



No. 314. Cytherea nitida. 

 Eocene, Paris Basin, France. 



No. 315. Artemis (Dosinia) exoleta, Linn. 

 Quaternary, Ficcarizzi, near Palermo, Sicily. 



No. 316. Cardium echinatum, Linn. Var. Dcshayesi, Payr. 



This type genus of the family Cardiidse supplies 330 extinct species since 

 the Silurian. Quaternary, Ficarizzi, near Palermo, Sicily. 



No. 317. Cardium multistriatum., 

 Cretaceous, Lampasas Hills, Bell Co., Texas. 



No. 318. Chama calcarata, Lam. 



This genus, the type of the famdy Chamidse, began in the Cretaceous, and 

 is represented by 40 fossil species. Eocene, Grignon, France. 



No. 319. [662, Cast]. Caprina adversa, d'Orb. 



This specimen of this most singular genus has both valves present, one of 

 them very large, elongate and sinistrally coiled, the other so short and stunted 

 as to resemble more the overgrown operculum of some Gasteropod shell. 

 From the Lower Chalk of Clarente, France. Size, 9x7. 



