124 RATHBUN 
segment has a deep median sulcus. The abdominal sulci are filled with 
a thin short pubescence easily rubbed off. The sixth segment is about 
one and a third times as long as the fifth. 
Dimensions.— Female (station 3441), length from tip of rostrum to 
tip of telson 64 mm., length of carapace 16 mm., length of antennal 
scale 10.5 mm. 
Harriman Expedition.—Juneau, 20 fathoms. 
Distribution.—From Bering Sea to San Diego, California (including 
Puget Sound and Strait of Fuca), 20-309 fathoms; taken at 142 
stations by the A/vatross, often in large numbers. Less abundant at 
southern localities. Off southeastern coast of Kamchatka, g6-100 
fathoms, at two A/satross stations. 
Two specimens were received from the Hopkins Laboratory at Pacific 
Grove; they were probably taken in deep water. 
One specimen was collected at Port Etches, Alaska, in 12-18 fathoms, 
by W. H. Dall. 
Variations.—The rostrum in normal individuals does not extend be- 
yond the eyes; in many cases, however, it is evident that the rostrum 
has been broken off or injured and later renewed, the new rostrum having 
a narrow, elongated, and ascending tip exceeding the eyes, but of variable 
length. In other respects these abnormal forms do not differ from the 
types. 
CRANGON RESIMA Rathbun. 
Crangon resima RATHBUN, Proc. U. S. Nat. Mus., xxIv, 889, 1902. 
Near C. communis. Carapace and rostrum a little more than one 
third the length of the abdomen; a median carina on the middle third 
of the carapace, armed with two spines, not 
Sel= far apart, the posterior larger and more ele- 
vated and in front of the middle. A sharp 
hepatic spine is in a transverse line with the 
anterior median spine and terminates a short 
but prominent carina. Rostrum long, narrow, 
pointed, advanced beyond the eyes, ascend- 
a ) ing at an angle of about forty-five degrees, 
Fic. 65. Crangon resima.  &- slightly curved, and prolonged downward in 
Station 2935. @. Dorsal view of a 
Side view of game (XC ap) 2). ba thin compressed plate which appears spatu- 
(X 38). d. Chela (X 4). late in a side view. The development of this 
plate is dependent on age; specimens 20 mm. long show no evidence of it. 
The second segment of the antennular peduncle is three times as long 
as the third; the scale on the outer side at the base is very thin and 

