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BULLETIN 201, UNITED STATES NATIONAL MUSEUM 



as this joint. On the dorsal surface of the eyestalk there is a promi- 

 nent tubercle. The pigment is golden-brown. In M. robusta the eye 

 is very large, more than twice as wide as the basal joint of the an- 

 tennular peduncle and as long as the first two joints of the antennular 

 peduncle. There is no tubercle on the dorsal surface of the eyestalk. 

 (2) The antennal scale (fig. 36, b), while substantially of the same 

 shape in the two species, is more slender in M. microphthalmia, than in 



Figure 35. — Meterythrops robusta S. I. Smith: a, Antennal scale; b, telson; c, first pleopod 

 of male; d, second pleopod of male. (After G. O. Sars.) 



M. robusta. In the former species it is nearly four times as long as 

 broad, whereas in the latter species it is only three times as long as 

 broad. 



(3) The inner uropod is without spines on its inner margin. In 

 M. robusta there is a long series of spines, about 30 in number, extend- 

 ing from the statocyst almost to the apex. 



Type lot. — Two adult males, two adult females, U.S.N.M. No. 81259, 

 from Japan, Albatross station 4800. 



