CALIFORNIA STALK-EYED CRUSTACEA. 155 



General color yellowish white; the antennas are blue and the anterior 

 portion of the carapace has more or less of the same coloration; a peculiar 

 reddish coloration occurs on different parts of the body, notably on either 

 side of the cardiac area of the carapace. 



Length four inches; large cheliped three-eights of an inch longer than 

 the smaller one. 



One large male specimen and several small ones 

 dredged in about 25 fathoms off San Diego, Calif. Col- 

 lection University of California. 



Family PARAPAGURID^. 



Similar to the Paguridse but having trichobranchiefi, 

 instead of phyllobranchise. Deep sea forms. 



Genus Parapagurus Smith. 



Resembles Pagurus. Third maxillipeds widely separated at the base. 

 X^helipeds very unequal. Sternum between the first and second pereopods 

 narrow. Eleven pairs of branchiae, two at the base of the maxillipeds and 

 each of the first three pereopods, and three at the base of the fourth. 

 Well developed and symmetrical pairs of appendages on the first and sec- 

 ond abdominal segments in the male. 



Type. P. pilosimanus SMITH. 



Parapagurus Mertensii (Brandt}. 



Pagurus Mertensii BRANDT, Middendorffs Siberische Reise, Bd. II, Th. 1, 



1851, p. 112. 

 Eupagurus Mertensii STIMPSON, Journ. Bost. Soc. Nat. Hist., Vol. VI, 1857, 



p. 483; Proc. Acad. Nat. Sci. Phila., 1858, p. 237. BENEDICT, Proc. 



U. S. Nat. Mus., Vol. XV, 1892, p. 2. 



Anterior portion of the carapace sparsely hairy and about as wide as 

 long. Median frontal tooth prominent, acute, the lateral teeth small. 

 Ocular scales ovate, acute, concave above. Eye-stalks short, about one- 

 half the length of the anterior portion of the carapace. Acicle slender, 

 rounded, sparsely ciliated, curved downwards, much exceeding the eye- 

 stalks, but not reaching the tip of the antennal peduncle. Chelipeds 

 pubescent, spiny, very unequal; right cheliped very large; merus armed 

 with a row of short spines on the inner and outer margins of the lower 



