46 RATHBUN 
PANDALUS HYPSINOTUS Brandt. 
Plate 1, fig. 5. 
Pandalus hypsinotus BRANDT, in Middendorft’s Reise in den dussersten Norden 
und Osten Sibiriens, 11, Zool., I, 125, 1851. Unalaska. 
Body stout. Rostrum a little (one sixth or one seventh) longer than 
the carapace, which is strongly arched dorsally. The median crest 
reaches nearly to the posterior margin; the superior median spines are 
movable, occupy the anterior three fifths of the carapace, and extend an 
equal distance on the rostrum, in all numbering 17 to 22. The distal 
portion is strongly ascending and unarmed, except at the tip, which is 
oblique and armed with three immovable spines; the lower margin is 
furnished with 7 to g fixed spines, the posterior ones very large and 
hooked; lateral carinz of moderate prominence. Antennal spine of 
moderate size, acuminate; pterygostomian spine small. 
Eyes pyriform, nearly as broad as long; cornea in alcohol bluish; 
ocellus darker. 
Antennular peduncle reaching not quite to the middle of the acicle; 
second joint a little longer than the third. Outer flagellum two thirds as 
long as carapace, the posterior five sixths thickened; inner flagellum 
about one fourth longer than outer; basal scale lobiform, not reaching 
end of eye. 
Antennal scale about four fifths as long as carapace, oblong, extremity 
obliquely subtruncate, spine very slightly longer. Peduncle reaching to 
end of second segment of antennular peduncle; flagellum nearly as long 
as the body. 
Maxillipeds in large specimens reaching a little in advance of the acicle; 
first pair of feet nearly to end of acicle. Right leg of second pair reach- 
ing about to the end of the rostrum, carpus with 19 or 20 segments, the 
first and last of which are about equal to the three adjoining segments; 
propodus as long as the last four segments of the carpus, fingers two 
thirds the length of palm. Left leg of second pair half again as long as 
right; carpus composed of about 60 segments, the first and last subequal 
to the three adjoining segments; propodus a little longer than the last 
three segments of the carpus; fingers nearly as long as palm. The merus 
and the ischium of the second pair are also more or less segmented. The 
third pair of legs extends beyond the acicle by the length of the dacty- 
lus and half or more of the propodus; the fifth pair reaches beyond the 
middle of the acicle. Dactyli of last three pairs, in the female, contained 
from two and one fourth to four times in their propodi. In the male the 
propodi of the third and fourth pairs are a little shorter, are recurved (in 
the third pair strongly so), and are narrowed at the extremity. 
