Cephalapoda. 20 Ancyloceras. 



Hillsii, Sow. Sp. (Scaphites), d'Orb. P. F. p. 494. E. G. 



Humboldtianus, Lea, Sp. (Orthocera), Forbes, Q. J. G. S. vol. 



i, 174. N. Gren. N. 



intermedius, Phil. Sp. (Hamites), d'Orb. P. F. 494. E. G. 



Matheronianus, d'Orb. P. F. 497, 122. Fr., Strait of Magellan. G. 

 Moreausianus, d'Orb. Prod. 147. Fr. U. G. 



? Mortonij Hall & Meek (HELICOCERAS), Mem. Boston Acad. 



vol. v, 396, 4, 3. 

 ? Nicolleti (ii), H. & M. Mem. Boston Acad. 2d s. vol. v, 397, 



4, 4. Nebraska. C. 

 ? Nebrascensis, Meek & Hayden (HELICOCERAS), 1856, Proc. 



Acad. p. 71. 



Orbignyanus, Math. 1843, Cat. 265, 41, 1-2. Fr. L. G. 



ornatus, d'Orb. Prod. 101. Fr. N. 



Perezianus, d'Orb. Prod. 101. Fr. N. 



pulcherrimus, d'Orb. not Querist. P. F. 495, 121, 3, 7. Fr., G. N. 

 pulcherrimuSj Quenstedt (Puzosianus), pi. 21, f. 1. 



pulchellus, d'Orb. P. F. 511. Fr. .2V. 



Puzosianus, d'Orb. P. F. 506, 127, 1-4. Fr. N. 

 Renauxianus, d'Orb. (gigas), P. F. 499, 123. 



Safedensis, Con. Lynch's Exped. 227, 23, f. 117-118. Syria. C. 



Saussureanus, Pictet, Sp. (Hamites), d'Orb. Prod. 125. Fr. G. 



sexnodosus, Roem. Sp. (Hamites), d'Orb. Prod. 65. G. N. 



simplex, d'Orb. P. F. 503, 125, 5-8. Fr. JV. 

 spinatus, Hebert, not Beauy. & Sauz6, 1843 (Heberti), M. G. 



5. F. 370, 29, 6. 



Spiniger, Sow. Sp. (Hamites), d'Orb. Prod. 125. E. G. 



tenuisulcatus, Forbes, Sp. (Hamites), d'Orb. Prod. 214. India. C. 



Funcus, M. & H. 1858, Proc. Acad. Phil. p. 56. Nebraska. C. 

 sj d'Orb. (Matheronianus), P. F. 504, 126. 



Aptychus, Yon Meyer, 1831 (TRIG ONELL1TES,* Park. 1811). 



Cheyennensis, Meek & Hayden (TRIGONELLITES), Proc. Acad. 



1860, 421. 

 /rassws, Hebert (TRIGONELLITES), M. G. S. Fr. 368, 28, 8. 



=* The generic name, given by Parkinson in "Organic Remains," vol. iii, p. 

 184, must take precedence of the name Aptychus ordinarily used. The type is T. 

 lata, and is well figured, although the author did not know where to place it in 

 the classification. There has been considerable doubt in regard to the nature of 

 ' ' Aptychus." D'Orbigny considered it a pedunculated cirrhipede ; but it is now 

 generally believed to be the operculum of Ammonites. 



