92 PROCEEDINGS OF THE ACADEMY OP 



Synonymy of the American Mosasaurus, 



1. From the Eastekn portion of the Continent. 



Saurian, resembling the reptile of Maestricht. Mitchell : Obs. Geol. N. Am. 

 1818, 384, pi. viii. fig. 4. 



dfosasaurus. Dekay : Ann. Lye. Nat. Hist. N. Y. 1828 36, iii. 135. Morton: 

 Am. Jour. Sci. 1830, xviii. 246; Syn. Org. Rem. 1834, 27. Harlan: Trans. 

 Geol. Soc. 1835, 81; Med. Phys. Res. 1835, 285. Emmons: N. Car. Geol. 

 Surv. 1858, 217. 



Geosaurus Mitchelli. Dekay: Ann. Lye. Nat. Hist. 1828 36, iii. 138. Har- 

 lan : Trans. Geol. Soc. 1835, 82 ; Med. Phys. Res. 1835, 285 ; Edinb. Phil. Jour- 

 1834, xviii. 32. Pictet : Palaeont. 1853, i. 506. 



Geosaurus. Morton: Am. Jour. Sci. 1830, xviii. 246, Syn. Org. Rem. 1834, 

 23. 



Saurian reptile, or 3Iaestricht monitor. Harlan : Jonr. Acad. Nat. Sci. 1825, 

 235 ; Trans. Geol. Soc. 1835, 81 ; Med. Phys. Res. 285, 384. 



Mosasaurus Dekayi. Bronn : Leth. Geog. 1838, ii. 760. Gibbes : Smiths. 

 Contrib. 1858, 8. Pictet: Palaeont. 1853, i. 505. 



Mosasaurus occidentalis. Morton : Proc. Acad. Nat. Sci. 1844, 133. 



3Iosasaurus Camperi or M. Hofmani. In part of Pictet: Palaeont. 1845, 

 ii. 64. 



Atlanlochelys Mortoni. Agassiz : Proc. Acad. Nat. Sci. 1849, 169. 



Mosasaurus minor ; M. Couperi ; and M. carolinensis. Gibbes : Smiths. Con- 

 trib. 1850. 



Mosasaurus Maximiliani. Pictet, in part: Palaeont. 1853, i. 505. Emmons: 

 N. Car. Geol. Surv. 1858, 217. 



3Iosasaurus Mitchelli. The name which according to usage should be adopted. 

 if the eastern is a distinct species from the western one. 



2. From the Western portion of the Continent. 



Ichthyosaurus missouriensis. Harlan : Trans. Am. Phil. Soc. 1834, 405 ; Tr. 

 Geol. Soc. 1835, 80; Med. Phys. Res. 1835, 284, 344. 



Batrachiosaurus. Harlan: Lond. Edinb. Phil. Mag. 1839, xiv. 302. 

 Balrachotherium. Harlan : Bui. Soc. Geol. 1839, x. 90. 

 Batrachiosaurus missouriensis. Von Meyer : Jahrb. Min 1845,313. 



Mosasaurus Neovidii. Von Meyer: Jahrb. Min. 1845, 312. Pictet: Palaeont. 

 1853, i. 505. 



Mosasaurus Maximiliani. Goldfuss: Nov. Act. Acad. Leop. Nat. Cur. 1845, 

 xxi. 179 ; Jahrb. Min 1847, 122. In part of Pictet: Palaeont. 1853, i. 505. 



Mosasaurus missouriensis. Leidy : Proc. Acad. Nat. Sci. 1857, 90. This name, 

 according to usage, is the one to be adopted for the western species, if distinct 

 from the eastern one. 



Dr. Bridges announced the decease, at Charleston, S. C, on the 16th 

 inst., of Dr. Thos. D. Mutter, late a member of the Academy. Dr. 

 Mutter was elected in 1883, and at one time held the office of Record- 

 ing Secretary of the Academy. 



On leave granted, a vote of thanks was tendered to Mr. M. P. Rue, 

 of Pcrrinesville, N. Jersey, for the valuable donation of fossils pre- 

 sented by him this evening. 



[March, 



