a specimen of the California Aturia, I worked out a very clear 

 outline of the septa and found the lobes to he wider than those 

 of any of the figures of the European A. ziczac, and I am there- 

 fore disposed to retain the name of A. angustata, which should 

 have been inserted in the Check List. 



640 = Nautilus Lamarckii, Deshayes, Coq. Foss. des env. de Paris II, 

 707, c, i. N. Burtini, Galeotti. 



648 := Clavella vicksburgensis, Conkad. 



051 = Nummulitea Mautelli, Moetok, Synopsis, 45, 5, 9. 



658 = Scutella crustuloides, Morton, lb. 77, 15, 10. 



660 =: Scutella pileus-sinensis, Ravenel, Proc. Acad. Nat. Sci. 



663 = Echinus infulatus, Morton, ib. 75, 10, 7. 



664 =: Scutella Jonesii, Forbes, Quart. Jour. Geol. I, 440. 



665 = Scutella Rogersi, Morton, Synopsis, 77, 13, 3. 



666 =: Mortonia tumida, Conrad, Proceed. Acad. Nat. Sci. 1865, 184. 



667 = Pyrgorhynchus Mortonis, Mich. Rev. et Mag. Zool. 1850, 2. 

 G70 = Catopygus patelliformis, Bouve, Proc. Bost. Soc. Nat. Hist. 



IV, 2. 

 674 = Cellepora tubulata, Lonsdale, Quart. Jour. Geol. Soc. I, 70. 

 690 = Terebratula lachryma, Morton, Synopsis, 72, 10, 11, and 16, 6. 

 696 = Plagiostoma dumosa, Morton, ib. 59, 16, 8. 

 738 = Umbrella planulata, Conrad, Wailes' Geol. of Miss. pi. 14, f. 1. 

 755 — Described from an imperfect specimen as n. g. Doliopsis. It is, 



however, generically and specifically allied to Galeodea Peter- 



soni, and therefore the genus is abandoned. 



Note. — Synonymes and references to my own species will be found in 

 the American Journal of Conchology, by George W. Tryon, Vol. I, p. 1. 



The shells of California which I have inserted in this Check List are 

 regarded as Cretaceous species by Mr. Gabb. They are only referred to the 

 Eocene provisionally in consequence of their association with the genera 

 Aturia and Venericardia, neither of which as properly restricted existed in 

 the Cretaceous period, and from the fact that Mr. Gabb does not name one 

 exclusively Cretaceous genus in Division B, except Anchura (Aporrhais), 

 which, as it was found "in a single stratum of greenish-gray limestone," 

 may not belong to Division B. 



It will be observed that as I have published a Check List of the older 

 Tertiary formation and its subdivisions and Mr. Meek a Check List of the 

 Miocene, these together constitute all the Tertiary Divisions of North 

 America ; and so far as our knowledge extends all the species are extinct. 

 The Oligocene has been found in St. Domingo, and is supposed to occur in 

 Australia, where Professor McCoy thinks he finds foiir of the species of 

 this formation," identical with recent shells — Limopsis Belcheri, L. aurita, 

 Pectuncuhis laticostatus, and Corbula sulcata. Not one of these species has 



Older Miocene, McCoy. 



