CALIFORNIA STALK-EYED CRUSTACEA. 167 



Astacus oreganus Randall. 



Astacus oreganus RANDALL, Journ. Acad. Nat. Sci. Phila., Vol. VIII, 1839, 

 p. 138, PL VII. DEKAY, Zoology of New York, Part 6, Crustacea, 1844, 

 p. 23. ERICHSON, Wiegmann's Archiv. f. Naturg, (1), Bd. XII, 1846, 

 p. 375. STIMPSON, Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 495. 

 HAGEN, 111. Cat. Mus. Comp. Zool. Harvard Coll., No. 3, 1870, p. 95. 

 FAXON, Mem. Mus. Comp. Zool. Harvard Coll., Vol. X, No. 4, 1885, 

 p. 133. 



Randall's description of this species is as follows: 



"Body fuscous, granulated, carpus with a sharp spine at the anterior 

 angle; arm produced into a spine on each side anteriorly; thorax behind 

 the front with five spines placed three before and one on each side behind 

 the lateral ones; a large reddish spot on each side posteriorly; front little 

 reflected on the sides, terminating in a long, slender spine and having a 

 short, marginal spine on each side. Lon. 4". Testa granulata, bimacu- 

 lata, fronte valde producta." 



Columbia River. 



Randall's specimen of this species has, unfortunately, 

 been lost and nothing answering to his description has 

 since been found. If the species belongs to the genus 

 Astacus it differs from all the Astaci that are now known 

 in the possession of a median thoracic spine. The fig- 

 ure accompanying Randall's description is so obviously 

 inaccurate that it has no scientific value whatever. Dr. 

 Hagen suggests that oreganus may be the same as leni- 

 usculus, as both species come from the same locality. 

 Faxon considers the species indeterminate. 



The species described by Randall as Nephrops occi- 

 dentalis was doubtless wrongly reported, through an 

 exchange of labels, from Western America, instead of 

 the Sandwich Islands. Ortmann, who puts the species 

 in the genus Enoplometopus unites with it E. pictus 

 A. Milne-Edwards. 1 



1 See Kingsley, Bull. Essex Inst., Vol. XIV, 1883, p. 131, PI. II, fig. 1, and Ortmann, 

 Zool. Jahrb. Abth. f. Syst., Bd. X, 1897, p. 274. 



