DECAPODS 29 



The outer maxillipeds do not reach the end of the antennal scale ; the 

 first pair of feet reach to the middle of the scale ; the second pair extend 

 not quite so far, and are more slender ; the third pair reach nearly to or 

 beyond the end of the scale; the fifth pair to the end of the antennal 

 peduncle. The meral and propodal joints of the last three pairs are 

 furnished with fine setae. 



Abdomen devoid of a median carina or median spines ; the sixth seg- 

 ment is two and a half times as long as the fifth, and between three 

 fourths and four fifths as long as the telson. The telson is about as long 

 as the outer branch, longer than the inner branch of the swimmeret ; it 

 is armed with 7 to 9 spinules on either side and 4 long spines at the 

 end. Eggs few and very large, the greatest diameter equahng the length 

 of the fifth abdominal segment. 



Dmensions. — Male, length of carapace and rostrum 19 mm., of 

 rostrum 6.5 mm., of abdomen 32.5 mm. 



Distribution. — From Bering Sea to off Monterey Bay, California, and 

 Kamchatka; 322 to 1771 fathoms. 



Taken at the following stations of the Albatross : 

 North of Rat Islands, Aleutians, 850 fathoms, station 3784. 

 Southwest of Pribilof Islands, 1625, 1771 fathoms, stations 3308, 3603. 

 North of Islands of Four Mountains, 1033 fathoms, station 3307. 

 South of Pribilof Islands, 1401 fathoms, station 3604. 

 West of Unalaska (type locality), 322 fathoms, station 3327. 

 North of Unalaska, 399 fathoms, station 3329. 

 Southeast of Chirikof Island, 695 fathoms, station 3340. 

 East of Prince of Wales Island, 1569 fathoms, station 2859. 

 Off Queen Charlotte Islands, British Columbia, 1588 fathoms, station 



3342. 

 Off Destruction Island, Washington, 516 fathoms, station 3343. 

 Off Sea Lion Rock, Washington, 636-877 fathoms, stations 3070, 3071, 



3074, 3075- 

 Off Monterey Bay, California, 418 fathoms, station 3127. 

 Off Copper Island, Kamchatka, 1567 fathoms, station 3783. 



Relations. — The rostrum of this species approaches that of H. rostrata 

 Bate, but is considerably longer; the pleon is hke that of H. glacialis 

 (Buchholz), H. glauca Bate, and H. mollicutis Bate in being without median 

 carina and spines. 



Family FAL^MONIDyE. 

 Genus Palaemon Fabricius. 



PAL^MON RITTERI Holmes. 

 In this species either one or two of the seven or eight dorsal teeth are 

 situated behind the rostrum. Three ventral teeth. 



