42 



Monograph of (he gecus. 



Species. 



Platen. 



Tolume. 



Family. 



Pleiodon 2 



Psaminobia 59 



Psammotella 7 



Sanguinolaria 5 . 



Soletellina 21 



Tapes .^. 75 



Tellina * 345 



Thracia 22 



Trigonia 4 



Tugonia 6 



TJnio 525 



Venus 141 



1 

 1 



4 

 13 



58 

 3 

 1 

 1 



9fi 

 26 



Hippopus. 

 TriJacna 



Order XV. — Metarrhipt^. 



1 1 ... 



9 8... 



Order XVI. — Heteromyaria. 



Lithodomus 34 5 



Modiola 71 II 



Mytilus 61 11 



Order XVII.- 



Anomia 37 .. 



Avicula 75 .. 



Crenatula 8 .. 



Hemipecten 1 .. 



Hinnites 2 .. 



Blalleus 13 .. 



Pecten 176 .. 



Pedum 1 .. 



Perna 28 .. 



Pinna 66 .. 



Placunanomia 14 .. 



Spondylus 68 .. 



Vulsella 17 .. 



-MONOMYARIA. 



18 

 2 

 1 

 1 

 3 



35 

 1 

 6 



34 

 3 



18 

 2 



Order XVIII.— Rudista. 

 No genera monographed. 



Sub-Branch Molluscoidea. 



Class D.— TUNICATA. 



Order XIX. — Saccobranchia. 



Order XX. — Dactylobranchia. 



Order XXI. — T^niobranchia. 



Order XXII. — Larvalia. 



No genera monographed. 



Class E.— BRACHIOPODA. 

 Order XXIII. — Arthropomata. 

 Terebratula and Rhynchonella 61 11 



13 



299 



