224 SIXTH RErORT — 1836, 



ractcrs, which range in tlie same parallels of latitude, through 

 all the degrees of longitude, and that notwithstanding the har- 

 rier which a wide ocean may be supposed to interpose*. The 

 comprehensiveness of this law will evidently be modified by the 

 number of generic divisions admitted by naturalists, and it will 

 be scarcely tenable if the geographical groups of species be 

 raised to generic rank as has been of late frequently done. 



The report includes only the vertkbrata, but the fourth 

 volume of the Fauna Boreali-^mericana, by the Reverend 

 William Kirby, now in the press, will give a complete review of 

 the present state of North American Entomology. Almost 

 all that is known of the crustace.e, molluscs, and zoo- 

 PHYTA of that country, is owing to the labours of Messrs. Say 

 and Le Sueur, whose original papers are contained in the Journal 

 of the Academy of Sciences of Philadelphia, so often quoted. 

 Dr. S. G. Morton, in an able synopsis of the organic remains of 

 the cretaceous group of the United States, lateh^ republished 

 fromSilliman's Journal, gives the following list of recent shells 

 common to the European and American coasts of the Atlantic. 



Purpura lapillus. 

 Bucciinim undatum. 

 Natica carena. 

 Fiisus islandicus. 

 Cyjirina islandica. 

 Saxicava nigosa. 

 Lucina divaricata. 

 Pholas crispata. 

 " costata. 

 Solen ensis. 

 Mya ai'enaria. 

 Mvtilus edulis. 



Modiola papuaiia. 

 Mactra deaurata. 

 Spirorbis nautuloides. 

 Thracia convexa. 

 Soleciutiis fragilis. 

 Glycimcris siliqua. 

 Cardium gi-oenlandicum. 



" islandicuni. 

 Strigilla carnaria. 

 Tellina punicea. 

 Pecten islandicus. 

 Balanus ovularis. 



A list of the fresh-water shells of the fur countries occurs in 

 the third volume of the Fauna BoreaU-Americuiia. 



EMEND ANDA. 



In page 1G8, line 9, for 85, read 75. The same error occurs in Audubon's Ornitho- 

 logical Biography, vol. i. p. 381. 



Mr. Swainson's 2d vol. of the Natural History of Birds ha\-ing been published while 

 this paper was passing through the press, we followed it in making some changes in the 

 arrangements of the yrallatnres, in consequence of which the following alterations re- 

 quire to be made in the columns of numbers of the table in pnge 177. Tantalidic 5, 1, 

 1. Ardeul(ji,\\,\\, \. Scolojiacidie, ib, ^il, 2i. Hallidw, 7, 1,1. Charadriadte, 8, 

 11,3. 



We have followed the common practice in arranging the phalaropes with the sco- 

 lojmcidie ; but they are, asTemminck has remarked, decidedly natatorial in their habits ; 

 and we may add, resemble the ducks in their under plumage and bills : on the other 

 hand, the flamingo is, as Dr. Smith has observed, a true wader in its manners, and has 

 been classed as siicli bv all ornithologists except Mr. Swainson. Vide Swains. Birds, 

 ii. p. 190. 



• Munogr. Sic. 



