GEOLOGY. DIBRANCHIATA. 21 



Upper Amazon : — N. spp. of Buliimis, Dyris (n. gen.), Ebora (n. gen.), 

 Hemisinus, Iscea (n. gen.), Liris (n. gen.), Neritina, and Pachyodon; 

 Conrad (73) : Corhula {Anisothyris ?) ledceformis, n. sj). ; Dall (95). 



Peru : — -Fossils from Payta, with n. spp. of Awipullina, Area, Cardmm, 

 Cerithium, Fusus, Littorina, Raeta, Tritonium, Turritclla, and Vohitilithes ; 

 Gabb (112). 



3. Secondary. 



Cretaceous: — Notes on some N. American species described by Gabb, 

 said to be really Tertiary; Conrad (42): reply by Gabb (100): rejoinder 

 by Conrad (46). — Notes on some United States species; Conrad (54). 

 — N. spp. of Diploschiza, n. gen., and Terebratulina from Alabama ; 

 Conrad (44). — Note on black limestone fossils from Dakota; Conrad 

 (53). — Astarte{1) staminea, n. sp., Mississippi; Conrad (72). — N. spp. of 

 ^nona (n. gen.), u3Sora (n. gen.), Cardium, Solyma (n. gen.), Tenea 

 (n. gen.), and Venilia from New Jersey; Conrad (72). — N. spp. of 

 Crassatella [described as Eocene, but really Cretaceous ; iii, p. 270] ; 

 Conrad (48). — N. spp. of Camptonectes, Cancellaria, Cardium, Donax, 

 EuliTna, Gadus, Gemma (?), Liroscapha (n. gen.), Nemoarca, Ferissonota 

 (n. gen.), and Trigonoarca from New Jersey; Conrad (70). — N. spp. of 

 Gouldia, and Scambida (n. gen.) from New Jersey ; Conrad (69). — N. spp. 

 of AxiiKea, Crassatella, Cyprimeria, Dentalium, Goniosoma, Inoceramus, 

 Nucularia, and Trigonoarca from New Jersey ; Conrad (68). — Cyprimeria 

 peruviana, n. sp., Peru ; Conrad (48). 



Jurassic: — Notes on fossils from Plumas Co., Cal., with n. spp. of 

 Ammonites, Astarte, Cardium, Goniomya, Pholadomya, Plicatula, and 

 Turbo {1), from Nevada; Gabb (109). 



Trias: — N. spp. of Astarte from New Jersey; Conrad (65). — Solemya 

 triasina, n. sp., Pennsylvania; Conrad (70). — N. spp. of Cardinia (?), 

 Cassianella, Monotis, Posidonomya, and Spirifer, Nevada; Gabb (109). 



4. Primary. 



Palaeozoic: — -N. spp. of Mar testa (l), Texas, and Sanguinolites from 

 Missouri and Ohio ; Meek (136). 



Carboniferous : — Prisconaia ventricosa, n. gen. and sp., Kansas ; Conrad 

 (54). — Prothyris elegans, n. sp., Nebraska and Illinois; Meek (136). 



Silurian : — N. sj)p. of Trimerella from Canada ; Dall (94). 



III. SYSTEMATIC! 



MOLLUSC A IN GENERAL. 



Classification of the MoUusca; Morch (138). 



I. CEPHALOPODA. 

 DIBRANCHIATA. 



Argonaitta argo, notes on; Ford, iv, p. 276: A. pacifica, note on; Dall, 

 vii, p. 95. 



+ This sign is prefixed to fossil forms. 



