148 



EXPEDITION TO POINT BARROW, ALASKA. 



Two anterior segments of pleon with infero-posterior angle acute; third segment with this aiiglo 

 acute and produced upwards. Second and third segments of pleon armed with a single tooth each 

 on posterior margin, fourth with three, fifth with four teeth, all very small. Hand of first gnatho- 

 pod oval and fringed witli long hairs on the posterior margin. Hand of second gnathopod in male 

 broadly oval, and armed on the edge with 3-4 blunt teeth and running out into a broad, blunt tooth; 

 claw large, curved, and acute, shutting on the inside of the palm. Inner ramus of the last pair of 

 saltatory feet ovate. Color purple with a lighter streak down the middle of the dorsal surface. 



Picked up on the beach near the station in considerable numbers, late in the summer of 1882. 



Museum numbers, 7893, 7894, 7895. 



34. MELITA LEONIS Murdoch. 

 (Plate II, figs. 2, 26.) 



This species is closely allied to M. dentata, but differs in the dentition of the segments of the 

 pleou, and in the length of the autennules. 



DESCRIPTION. Eyes small, oval, black. Auteunules reaching to the first segment of the 

 pleou. with the first joint of the peduncle a little shorter than the second. Third segment of the 

 pleon with the infero-posterior angle acute and produced upwards. First and second segments of 

 the pleon with one large median tooth on the posterior edge and eight fine deuticulations, the lat- 

 ter larger on the second segment; third with nine teeth, of which the median one is the largest; 

 fourth with five; fifth with six, lacking the median tooth; sixth with two small, blunt teeth. Hand 

 of first guathopod with infero-posterior angle of third joint not produced into a tooth; hand 

 elongate-oval, edge not toothed. Color purple, with two lighter streaks along the dorsal surface. 



I have named this species from the schooner Leo of Sail Francisco, from -which vessel the 

 specimens were obtained, by dredging in about five fathoms of water at the head of Norton Sound, 

 September 12, 1883. 



Museum numbers, 7896, 7897. 







35. GAMMAHACANTHUS LORICATUS (Sab.) Sp. Bate. 



A few were taken at Pergniak (in Elson Bay) among seaweed dragged up by the seine, Au- 

 gust 11, 1883, and some were also picked up on the beach late iu the summer of isxi*. 



It has been observed at Prince Regent's Inlet, Arctic America, abundant (Sir J. 0. Ross) iu 

 the "Arctic Seas" (Sir Edward Parry and Sir Edward Belcher) and Greenland (Kro'yer, quoted by 

 Spence Bate). Bo3ck (loc. cit.) gives as its habitat "Grccnlamlia, Spitsbergia, in Incubus Finlandiu'. 

 et Svccite et Norveghr." 



The Vega expedition obtained it at various points along the Arctic coast of Siberia from Nova 

 Zembla nearly to Bering Strait. 



