396 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



specimen taken on same date at nearby Albatross station 4804 (46*'42' 

 N, 151 "47' E) also in 229 fathoms. 



Metopa stelleri differs from M. cristata Gurjanova (1955), its closest 

 relative, by the lack of dorsal teeth on the segments anterior to 

 pereon 6. 



Metopa cristata Gurjanova 



Figure 3 

 Metopa cristata Gurjanova, 1955, pp. 176-178, figs. 7-8. 



Male. — Head not as long as first 2 body segments combined. Eye 

 medium sized, nearly round, light straw-colored m alcohol. Antenna 

 1 slightly shorter than antenna 2 ; first joint longer than second, which 

 is about 3 times as long as third ; fiagellum shorter than peduncle and 

 composed of about 13 joints. Antenna 2, third joint nearly ji length 

 of fourth, which is nearly as long as fifth ; flagellum about % length of 

 fifth peduncular joint, composed of 8-9 joints. Mandible normal, 

 second joint of palp long, third joint very small. Maxilla 1, inner 

 lobe very short, with 1 apical seta; outer lobe with 6 spine teeth; 

 palp 1-jointed, bearing row of apical spines and row of subapical setae. 

 Maxilliped normal; outer lobe not present. 



Gnathopod 1 rather slender; second joint not expanded, as long as 

 fourth and fifth joints combined; fifth joint about as long and slightly 

 wider than sixth: sixth joint expanding slightly distally, palm nearly 

 transverse, armed throughout with very fine teeth, a few short spinules, 

 and defined by several spines; seventh joint nearly as long as palm, 

 armed on inner margin with very fine teeth and several short spines. 

 Gnathopod 2 large, strong, second joint very slightly expanded distally, 

 not as long as sixth; fourth joint extending forward beside lobe of 

 fifth joint, and bearing row of spines on lower margin; fifth joint short, 

 produced below into narrow lobe between fourth and sixth joints; 

 sixth joint large, upper and lower margins slightly convex; palm 

 oblique, nearly straight, armed with low, uneven teeth, and defined 

 by sharp tooth; seventh joint stout and fitting palm. 



Pereopods 1 and 2 slender, much alike, but 1 slightly longer. 

 Pereopod 3, second joint scarcely expanded, but with hind margin 

 produced below into rounding lobe. Pereopods 3-5 nearly equal in 

 length; fourth joint produced downward behind to about middle of 

 fifth joint, which is not much shorter than sixth; seventh joint short, 

 rather strong; second joint of pereopods 4 and 5 broadly expanded. 



Uropod 1 projecting back slightly farther than 2, 2 slightly farther 

 than 3. All uropods with rather few short spinules. Uropod 3, 

 peduncle slightly longer than ramus and bearing row of very short 

 spinules on upper margin ; first joint of ramus with 3 marginal spinules. 

 Telson broadly oval, with 4 minute spinules on either lateral margin. 



