4O RATHBUN 
PANDALUS JORDANI Rathbun. 
Plate 1, fig. (3: 
Pandalus jordani RATHBUN, Proc. U. S. Nat. Mus., XXIV, 900, 1902. 
Surface smooth and shining. Rostrum about one and three fourths 
times as long as carapace, slightly arched above the eyes, terminal two 
thirds ascending; slender, armed with 14 to 17 spines above, includ- 
ing 4 on the carapace; distal three immovable, others movable; closer to- 
gether above the eye; 7 to 10 immovable spines below, extending nearer 
to tip than superior spines; tip acuminate; the posterior of the dorsal 
spines lies between the middle and the anterior third of the carapace. 
Antennal spine strong; pterygostomian small, slender. Eyes large, 
pyriform. 
Peduncle of antennule reaching to middle of antennal scale; second 
and third joints subequal; flagella subequal, one and a half times as long 
as carapace, thickened portion of outer flagellum extending half its length 
beyond the antennal scale. Scale three fourths to four fifths as long as 
carapace, extremity of blade broadly rounded, and equally produced with 
the spine; antennal peduncle reaching to end of second segment of an- 
tennular peduncle; flagellum one fourth longer than body. 
Outer maxillipeds slender, not reaching end of acicle. First pair of 
feet a little shorter; of the second pair, the right foot extends about to 
end of scale, the left may be half again as long; the nght carpus has 19g 
to 22 segments, the left 58 to 63 segments. The last three pairs of feet 
diminish a little in length successively, the third pair exceeding the scale 
slightly; their dactyli are elongate, and are contained from two and a 
half to two and four fifths times in their propodi. 
The third segment of the abdomen is compressed and its posterior 
half carinated, the carina interrupted by a slight lobe at the posterior third 
of the segment; this lobe is of varying size, at no time strong, and hav- 
ing a tendency to disappear in large specimens, where it may occur only 
as a slight unevenness in the curve seen in profile; posterior margin well 
produced backward, rounded, unarmed; fourth segment with posterior 
margin truncate, entire; sixth about twice as long as fifth and three 
fourths as long as seventh, which has ro to 13 lateral aculei on each 
side. 
Females bearing eggs taken in January and February off southern 
California. 
Dimensions.—Ovigerous female, length 124.5 mm., length of cara- 
pace and rostrum 59.5 mm., of rostrum 38 mm. 
