1921 J Schmitt: The Marine Decapod Crustacea of California 133 



Type Locality. — Norton Sound, Alaska, 12 fathoms. 



Distribution. — Arctic Ocean southward through Bering Strait to Kamchatka 

 and California, 3 to 240 fathoms (Eathbun). The single California record for 

 this species is from 240 fathoms, off Santa Cruz. 



Remarks. — Balss (1913, p. 63) considers Pagurus cap Hiatus (Benedict) identical 

 with P. trigonocheirus (Stimpson) (1907, p. 221), basing his remarks upon a speci- 

 men of the former received from the U. S. National Museum. However, with his 

 conclusion I am unable to agree, having the type of P. capillatus before me. The 

 differences between the two are unmistakable: in P. capillatus the antennal scale 

 does not exceed the eye, in P. trigonocheirus it does and usually considerably; the 

 eye-stalks of the former are the more slender, the length to breadth being about 

 as 5:1, while in the latter the relation is about 4:1, Balss giving 3.9:1 as an aver- 

 age of five specimens. Moreover the triangular outer face of the smaller hand of 

 P. trigonocheirus has its proximal upper and lower margins much bowed out (as is 

 well shown in Stimpson 's figure (Op. cit., pi. xxvi, fig. 2), making that face so 

 broadly triangular that its greatest width is contained in its length only twice; 

 in P. capillatus the width of the same face of the smaller hand is contained in 

 its length three times. The shape of this triangular outer face of the small hand 

 which in fig. 85, b is foreshortened and therefore does not show its proper propor- 

 tions, is very similar to that of P. setosus (p. 136, fig. 88), but relatively not so 

 long as compared to its width; in P. setosus the outer face of the smaller hand 

 is about four times as long as wide, in P. capillatus, as stated above, three times 

 as long as wide. Further the large hand is more hairy in fresh specimens of 

 P. capillatus, and not quite so narrow triangularly as in P. trigonocheirus. 



Pagurus tanneri (Benedict) 



Eupagurus tanneri Benedict, Proc. U. S. Nat. Mus., 15, 10, 1892. 

 Pagurus tanneri Holmes, Occas. Papers Calif. Acad. Sci., 7, 140, 1900; 

 Eathbun, H. A. E., 10, 158, pi. 4, fig. 7, 1904. 



Characters. — Large hand with a prominent ridge beginning at the articulation 

 of the carpus near the inner angle of the palm, running diagonally across it 

 and along the inner portion of the immovable finger; this ridge is joined a little 

 behind the gape of the fingers by another, running across the palm from near 

 its outer proximal angle; these ridges enclose a subtriangular area, either side 

 of which the palm is deeply excavated; subtriangular area armed with five or six 

 short spines ; outer depression of hand with a few spiny granules ; inner depression 

 unarmed. Outer face of small hand subtriangular and deeply concave; upper 

 margin armed with a single row of spines, a short row of spines from the carpal 

 margin unites with this row, making it appear double for a part of its length in 

 small specimens. Anterior portion of carapace as wide as or wider than long; 

 median projection of front triangular, much longer, and projecting much farther 

 forward than the subacute, broadly triangular lateral teeth, the ends of which 

 are furnished with a terminal spine. Eye-stalks about two-thirds as long as 

 anterior portion of carapace. Acicle exceeding eye-stalk by nearly half its length. 

 Dactyls of ambulatory legs about as long as entire carapace. 



Dimensions. — Type, male: length of carapace 31 mm., of anterior portion of 

 carapace 18 mm., width of anterior portion 19 mm., length of larger cheliped 

 102 mm., of hand 40 mm. Many of the specimens from off California are but half 

 the size of the type. 



