CHRONOLOGICAL CATALOGUE. 3 



7. 



1846. B[aird], S[pencek] F. Tlio sea-serpeut iu Norway. < Lit. Eec. and Journ. 

 Linncean Assoc. Pennsylvania College, ii, No. 5, Mar., 1846, pp. 106-107. 

 Notice of information obtained by Dr. H. Boie, while on a tour throagh Norway in 1817. 



8. 



1846. Baird, Spencer F. Hints | for Preserving | Objects of Natural History | pre- 



pared I by Prof. S. F. Baird, | for | Dickinson College, | Carlisle, Pa. | Carlisle: 

 I Printed by Gitt & Hinckley, | 1846. 8vo. pp. 12. 



Reptiles anrl Fish, pp. 7, 8. 



A supplementary schedule without title-page was published in 1848. 



a 



1847. Baird, Spexcer F. Dr. Leidy read a letter from Prof. Spencer F. Baird, of 



Carlisle, Pa., describing a Hybrid between the Canvass back Duck and the 

 Common Duck. < Proc. Acad. Nat. Soc. Phila., iii, 1846 and 1847, p. 209 (May 



4, 1847). 

 Nothing additional to the above ever published. 



10. 



1849. Baird, Spexcer F. Revision of the North American Tailed-Batrachia, with 

 descriptions of new genera and Species. '^ Journ. Acad. Nat. Sci. Phila., 2d 

 ser., i, pp. 281-294, Oct., 1849. 

 Issued also as excerpt, without title or repagination. 



"The following notes, introductory to a more detailed memoir on the same subject, will, it 

 is hoped, throw some light upon this obscure portion of American zoology. To this we would 

 refer for the descriptions of species, with their anatomical and physiological characters, giving 

 only in this place brief outlines of the genera and the synonomy of the species." 



The various genera are defined, and a synonymic list of species is given, with notes upon 

 habitats. 



Desmognathus (Baird), n. g. (on S. niger and 8. fuscus, auct.) 282 



The foUowiug new combinations are made: — 



Amhy stoma punctata (Linn.) Baird. E 283 



Ainhystoma opaca (Gravenhast) Baird. K. 



Amhystoma jeffersoniana (Green) Baird. E. 



Ainbystovia macrodactyla, Baird, n. s. (name given only, species described below). 



Amhystoma tigrina (Green) Baird. R 284 



Ambystoma lurida (Sager) Baird. E. 



Amhystoma mavortia, Baird, n. s. (name only, described below). 



Amhystotna episcopus, Baird, n. s. (name only, described below). 



Notophthalmus viridescens (Eafm) Baird. E. 



Notophthalmus torosus (Eschscholtz) Baird. E. 



Plethodus erythro7iota (Green) Baird. R 285 



Desmognathus niger (Green) Baird. E. 



Desmognathus fiiscus (Rafin.) Baird. R. 



Desmognathus aurieulatus (Holbrook) Baird. R. 



Pseudotriton montanus, Baird, n. s. (name only, described below) 287 



Pseudotriton salmoneus (Stover) Baird. R. 



Spelerpes longicauda (Green) Baird. R. 



Spelerpes guttolineata (Holbrook) Baird. E. 



Spelerpes hilineata (Greeu) Baird. E. 



Spelerpes cirrigera (Green) Baird. E. 



Batrachoseps quadridigitata (Holbrook) Baird. E. 



Kecturus lateralis (Say) Baird. R 290 



Necturus maculatus (Barnes) Baird. R. 



Siredon maculatus (Owen) Baird. R 293 



11. 



1849. Baird, Spencer F. Descriptions of four new species of North American Sala- 

 manders, and one new species of Soiuk. <^Journ. Acad. Nat. Sci. Phila,, 2d 

 ser., i, Oct., 1849, pp. 292-294. 



Ambystoma macrodactyla, Baird. n. s 293 



Astoria, Oreg. J K. Townsend, M. D. 



