CALIFORNIA STALK-EYED CRUSTACEA. 175 



developed. Fifth abdominal segment evenly rounded above, having no 

 trace of a carina; sixth segment rounded above, neither grooved or cari- 

 nated, with the spines at the posterior end the same in number and posi- 

 tion as in nigricauda, and with no groove on the lower side. Telson 

 short, about equaling the length of the preceding segment and scarcely 

 more than one-half the length of the carapace, the iipper surface rounded 

 (not grooved), the tip somewhat obtuse. The uropods are similar to those 

 of nigricauda and extend considerably beyond the tip of the telson. Each 

 of the abdominal segments in the male bears a median spine on the ven- 

 tral side. 



Length, 55 mm.; length of carapace, 15 mm.; of antennal acicle, 10 mm. ; 

 of telson, 8 mm.; of sixth abdominal segment, 7.5 mm. 



Two specimens, male and female, dredged at Trini- 

 dad, Humboldt County, Calif., together with numerous 

 specimens of nigricauda. 



Easily distinguished from the other species on the 

 coast by the absence of a median thoracic spine, the 

 short telson, and the acute rostrum. Collection Uni- 

 versity of California. 



Crangon munitus (Dana). 



Crangon munitus DANA, Proc. Acad. Nat. Sci. Phila., 1852, p. 20; Crust. 



U. S. Expl. Expd., Part 1, 1852, p. 536, PI. XXXIII, fig. 5. STIMPSON, 



Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, p. 497. KINGSLEY, Bull. 



Essex Inst., Vol. X, 1878, p. 54; WALKER, Trans. Liverpool Biol. Soc., 



Vol. XII, 1898, p. 275. 

 Crangon (Sclerocrangon) munitus ORTMANN, Proc. Acad. Nat. Sci. Phila., 



1895, p. 179. 



Abdomen not sculptured. Carapace seven-carinate, the median carina 

 armed with two small spines. Lateral keels of the carapace smooth and, 

 excepting the second from the median carina, ending in front in spines. 

 Epimera of the abdominal segments without spinules. 



Puget Sound (Dana). 



I have examined the specimens from Magdalena Bay, 

 Lower California, which Lockington l has identified with 

 munitus, and cannot agree with him in referring them 

 to that species. 



1 Bull. Essex Inst., Vol. X, p. 159. 



