CHECK LIST OF NORTH AMERICAN BIRDS. 121 



774. Larus occidentalis And. b 6G2. c 5476. R 664. 



Western Herring Gull. 



775. Larus cachinnans Pall, b — . c — . r 667. 



Pallas's Gull. 



776. Larns affinis Reinh. b — . c — . R 665. (G.) 



Reinhardt's Gull. 



777. Larus californicus Lawr. B 663. c 548a. R 668. 



Californian Gull. 



778. Larus dela-warensis Ord. b 664. c 548. R 669. 



Ring-billed Gull. 



779. Larus canus L. b — . c — . R 671. (! e.) 



Mew Gull. 



780. Larus brachyrhynchus Rich, b 665, 673. c 549. R 670. 



American Mew Gull. 



781. Larus heermanni Cass, b 666. cssi. R 672. 



White-headed Gull. 



782. Rissa tridactyla (L.) Bp. b 672. c 552. R 658. 



Kittiwake Gull. 



774. L. oc-cld-en-ta'-lis. See Dendracn, No. 113. 



775. L. ca-chin'-nans. Lat. cachinnans, laughing immoderately; cacA^nno, I roar witli laughter; 



Gr. KaxdCi" or Kayxd(cD, of same meaning. Well expressing the outcry of the gull. 



Not in the orig. ed. ; since determined to occur in Alaska. This is L. borealis of 

 Baird, Trans. Chicago Acad., i, 1869, p. 305. 



776. L. af-fl'-nis. Lat. q/^n/s, allied ; ac? and _/?/»'s. See Campi/Iorhi/nchi!S,'No. 6i. 



Not in the orig. ed. ; since determined to be a good species ; North American only 

 as accidentally Greenlandic. See Reinh., Vid. Medd. Nat. For. Kj(|)b., 1853, p. 78. 



777. L. cal-i-for'-ni-cus. To California. 



778. L. del-a-war-en'-sTs. To the State of Delaware ; named for Lord De La Ware. 



779. L. ca'-nus. Lat. canus, ashy, hoary-gray. Mediately derived from Kalw, to burn, con- 



sume, the root here seen giving rise to many words, as cinereus, kinetic, &c. 



Not in the orig. ed. Since ascertained to iniiabit Labrador. See Saunders, P. Z. S., 

 1878, p. 178, and Brewer, Bull. Nutt. Club, iii, 1878, p. 50. 



780. L. brach-y-rhynch'-us. Gr. ^paxvs, short, and ^vyxos, beak. 



Note. — We give all these Lari, excepting one, as good species, in deference to recent 

 investigation ; but much doubt that the method of treating them in the orig. ed. is not 

 more natural after all. 



78 1 . L. heer'-man-m. To Dr. Adolphus L. Heermann, of Philadelphia, who collected exten- 



sively in the south-west. 



This stands in the orig. ed., very erroneously, as L. helcheri. 



782. Ris'-sa trl-dac'-ty-la. Bissa or Ritm is the Icelandic vernacular name. — Lat. tris, thrice, 



and ducti/lus, digit, whether finger or toe : Gr.. 5a/cTi/Aos. This bird has the hind toe 

 rudimentary, leaving only three perfect digits. — Kitliwake is an old Scotch name of 

 this species ; perhaps from its cry. 



