136 A REVISION OF THE ASTACID^. 



Another large mule specimen, five inches long, in tlie U. S. National 

 Museum, from T. G. Scupham, California (No. 2267), is labelled '■'Astitcus 

 Orcgoncnm Nutt.," and by this name it is recorded by W. 11. Dall in his 

 " CataloECue of Illustrations of the Economical Invertebrates of the Ameri- 

 can Coasts," Bull. U. S. Nat. Mus , No. 14, p. 260, 1879. Randall's A. Ore- 

 ganvs was collected by Nuttall in the Columbia, but was certainly not 

 A. m'grcsccns. (See p. 133.) 



Types of A. nigrescens were sent to Dr. Ilagen by Stimpson. These were 

 probably afterwards destroyed in the great fire at Chicago. 



It is said by Stimpson to be common in the vicinity of San Francisco, and 

 to be sold in the market of that city. 



" Color, blackisli." Stimpson. 



The first abdominal appendages of the male A. nigrescens are incorrectly 

 figured by Huxley in " The Crayfish," p. 245, fig. 62, C, and by Brocchi in 

 Ann. Sci. Nat., 6^ Ser., Zool. et Paleont., Tom. II., PI. XIII. figs. 10, 11. 



5. Astacus Gambelii. 



Camharm Gambelii, Giraud, Proc. Acad. Nat. Sci. Phila.,VI. 90,1852, 380, 1S53. 



Astacus Gambelii, Agassiz, Proc. Acad. Nat. Sci. Pbila., "VI. 375, 1S53. 



Astacus Gambelii, Stimpson, Jouru. Bost. Soc. Nat. Hist., VI. 492,1857. 



Astaeus Gambelii, Hagen, 111. Cat. Mus. Comp. Zo5l., No. III. p. 90, PI. I. iigs. 97, 98, PI. III. fig. 170, 



PI. XI. 1870. 

 Astacus Gambelii, Paxon, Proc. Aiiier. Acad. Arts and Sci., XX. 152, 18S4. 



Known Localities. — Utah: Ogden River, Ogden. Idaho: Fort Hall (Coll. 

 U. S. Nat. Mus.) ; west side of Teton Basin (Coll. U. S. Nat. Mus.). Montana : 

 mouth of Yellowstone River. Wyoming: Willow Creek (?). California: Santa 

 Barbara (?). 



Girard's types are in the Museum of the Academy of Natural Sciences 

 of Philadelphia. One of them has been figured by Hagen. 



The female, as well as the male, has the peculiar beard on tlic chela. 

 The lower side of the peduncles of the antenna3 is also barbate in both sexes. 

 In some specimens the telson is notched in the middle of the hind border, 

 in other specimens it is entire. 



Two dozen fine specimens of this species were collected by Mr. J. A. 

 Allen at Ogden, Utah, in September, 1871. Tiie largest of these measure 

 95 mm. in length. Ogden City is on Ogden River, which flows into Great 

 Salt Lake. In the U. S. National Museum are specimens from a warm .spring 

 at Fort Hall, and from the west side of Teton Basin. Both of the.se locali- 



