23 



748. Tudicla (Pyropsis) Bairdi, (.U. c<i- II.) Meek. Dak. 



749. Tudicla (Pyropsis) perlata, Conr. Miss. 

 75(1. Tudicla elevata, O'ahh. N_ j_ 

 7r)l. Tudicla? dakotensis, (J/. <j- 7/.) Meek. Dak. 

 I^^.. Perrissolax? brevissima, {D'O.) Gabb. Ala. 

 7ri:5. Perrissolax octolyrata, {Com:') Gabb. Ala.; Miss.; N.J. 

 7.")4. Perrissolax trivolva, (Jnhb. N. .1. 

 755. Perrissolax [?] Richardsoni, {Tuomcij) Gabb. Ala. 



Class CEPHALOPODA. 



Order TETRABRANCHIATA. 

 Aiuiuonitidae. 



750. Baculites anceps, Lamarck'? Ala.; Ten. ; Del. ; Tex., &c. 



757. Baculites annulatus, Conr. Tex. 



758. Baculites asper, Mirton. Ala. 



759. Baculites asperoides, Meek ^ Hayden. Id. 



760. Baculites bacculus, Meek ^- Hayden. Id. ; Dak. 

 7ul. Baculites carinatus, Morton. Ala. 

 7iJ2. Baculites chickoensis, Trask. Cal. 

 703. Baculites compressus, Say. Dak.; Id. 



764. Baculites gracilis, Shumard. Tex. 



765. Baculites grandis, Hall ^ Meek. Dak. 



766. Baculites labyrinthicus, Morton. Ala. 



767. Baculites occidentalis, Meek. Vane. I. 



768. Baculites ovatus, Say. Dak. ; Id. ; N. J. ; Ala. ; Miss., &c. 



769. Ptychoceras (Solenoceras) annulifer, Morton. N. J. ; Ala. 



770. Ptychoceras Leai, {Troost) Meek. Ten. 



771. Ptychoceras Mortoni, Meek ij- Hayden. Dak. 



772. Ptychoceras texana, Shumard. Tex. 



773. Ptychoceras Verneuilii, {Troost) Meek. Ten. 



774. Hamites [?] arculus, Morton. Ala. 



775. Haruites[?] columna, (^Morton) D'Orb. Ala. 



776. Hamites Fremonti, Marcou. Tex. 



777. Hamites larvatus, Conr. Tex. 



778. Hamites rotundatus, Conr. Tex. 



779. Hamites [?] torquatus, Morton. Ala. 



780. Hamites [?] vertebralis, Morton. Ala. 



781. Ancyloceras annulatus, Shumard. Tex. 



782. Ancyloceras ? approximans, Conr. Ark. 



783. Ancyloceras [?] Nicolleti, Hall Sr Meek. Dak. 



784. Ancyloceras uncus, Meek Sj- Hayden. Dak. 



785. Scaphites abyssinus, (.^fortoyi) Meek ^- Hayden. Dak. 



786. Scaphites cheyennensis, ( Owen) J/eeX; ^ ^aj/c?en. Dak. 



