1921] Schmitt: The Marine Decapod Crustacea of California 43 
Dimensions.—Type, female: length 104 mm.; length of carapace and rostrum 
48.5 mm.; of rostrum 30.2 mm. The largest specimen on the Pacific Coast was 
taken off Point Arena, California, in 239 fathoms (‘‘ Albatross’’ station 3349). 
It measures 110 mm. long, carapace and rostrum 53 mm., rostrum 34 mm. (Rath- 
bun). 
Type Locality.—Off North Head, Akutan Island, Alaska, 72 fathoms (‘‘ Alba- 
tross’’ station 2842). 
Distribution—From Bering Sea to off San Nicolas Island, California, 3 to 
1084 fathoms. 
Remarks.—Miss Rathbun says: 
I have separated this form from P. montagui Leach of the North Atlantic on 
account of its somewhat longer rostrum, which varies from one and a half to one 
and two-thirds times the carapace, the dorsal spines terminating behind the middle 
of the rostrum, while in typical P. montagui the rostrum is from one and two-fifths 
to one and a half times the carapace, and its dorsal spines reach to or in front of 
its middle. In P. montagui the tip is bifid; in the subspecies usually trifid. 
Pandalus platyceros Brandt 
Plate 14, figure 3 
Pandalus platyceros Brandt in Middendorff, Reise in den dussersten Norden 
und Osten Sibiriens, Bd. II, Zool., Th. I, p. 123, 1851; Holmes, Oceas. 
Papers Calif. Acad. Sci., 7, 210, 1900; Rathbun, H. A. E., 10, 44, 1904. 
Characters——Body stout. Carapace covered with a dense, short pubescence. 
Rostrum one and one-half to one and two-thirds times as long as carapace, pro- 
vided with a broad, entire laminar crest on each side. Median erest arising 
halfway back on the carapace, armed with fourteen to seventeen spines extending 
to middle of rostrum, the anterior one to five spines fixed, the rest movable; usually 
a solitary spine not far behind the acute tip. Lower limb armed with seven or 
eight fixed spines, diminishing gradually in size; the basal tooth very large. 
Posterior part of rostrum deflexed, anterior half or two-thirds ascending, tip above 
level of carapace. Antennal scale four-fifths to seven-eighths as long as carapace, 
oblong, extremity of blade subtruncate, slightly exceeded by the spine. Right leg 
of second pair reaching to end of maxillipeds, carpus eight- to nine-jointed; left 
leg of second pair two-fifths again as long as right; carpus divided into twenty- 
seven or twenty-eight joints. Sixth segment of abdomen short and stout, one and 
one-half times as long as wide. 
Dimensions.—Type: length of carapace 34.9 mm., of rostrum 38.1 mm., of 
abdomen 46.6 mm., of caudal appendages 19.1 mm.; total length 138.7 mm. Of 
an ovigerous female, length 214 mm., length of carapace and rostrum 113 mm., 
of rostrum 68 mm. (Rathbun). 
Type Locality.—Unalaska. 
Distribution.—Unalaska to off San Diego, California, 25 to 266 fathoms. 
Japan (Balss). The 25-fathom record here cited was made off Portuguese Bend, 
near San Pedro, California, by the Venice Marine Biological Station. 
