Pacific Coast of North America. 325 



69. lanthe erostrata, sp. n. 



Head two and a half times broader tlian long, with promi- 

 nent antero-lateral angulations. Lateral margins produced, 

 entire. In place of the rostrum, which marks all the other 

 known species of this genus, there is a small median point. 

 Tlie eyes are dorsally situated a short distance from the lateral 

 edges. Tlie first pair of anteimge are short, not equal to 

 the width of the head. The second pair are broken in the 

 specimen examined. 



Fig. 30. 



lanthe erostrata. x 13^. 



The first thoracic segment is produced laterally in two 

 angulations. The second, third, and fourth segments are each 

 produced in two angulations, with a small epimeral lobe in 

 between. The fifth, sixth, and seventh segments have each 

 a large anterior lobe and a small posterior epimeral lobe. 



The terminal segment has two bluntly triangular angula- 

 tions, one on either side of a bluntly triangular central portion. 

 The uropoda are about as long as the caudal segment, are 

 styliform, with branches nearly equal. The first pair of legs 

 are prehensile. The others are simple, biunguiculate. One 

 specimen was collected at Chichagof Harbour, Attu (Aleutian 

 Islands), by Mr. W. H. Dall. 



Type. No. 22610, U.S. N. M. 



