226 bulletin: museum of comparative zoology. 



differs in the form of the distal tongue of the anterior median plate 

 of the male gonopods, this having the sides evenly convex instead of 

 angulate and the distal end broadly rounded so as a whole to appear 

 broadly spatulate instead of diamond shaped. Telopodite of anterior 

 gonopods differing obviously in having the distomesal process larger, 

 extending well distad of end of outer part instead of being exceeded 

 by the latter and distally more strongly bent ectad. 



In P. pcrtinens (male) the second tergite extends rather more below 

 level of coUum than in the present form where it extends but slightly 

 below it. In the present species the repugnatorial pores are situated 

 notably farther dorsad; the suture is laterally more clearly impressed 

 and runs closer to the pore which it touches, often curving a little 

 about its upper portion so as to bring the dorsal part of suture in line 

 with it whereas in the other species the pore is well removed. The 

 striae of the lower and lateral region up to and a little above pore are 

 similarly dense but they are finer, more lightly impressed, and in 

 posterior region in particular may appear obscure toward and above 

 the pore. 



Coxal processes of anterior legs of male larger. 



Number of segments, fifty-six. 



Width (male type), 3.2 mm., being more robust than P. pertinens. 



644. Phagostrophus wainonensis, sp. nov. 



Type.— M. C. Z. 4,918. Paratypes.— M. C. Z. 4,949, 4,924. 

 Solomons: Wainoni Bay, Pamua (W. M. Mann). 



With color-pattern as in the preceding species. It is more robust 

 than P. pertinens, agreeing rather with umaimis in this regard. The 

 pores, as with P. pertinens, are lower on the side than in waiainus. In 

 P. pertinens also the suture does not curve at all about the pore, being 

 essentially straight; but it is closer to the pore than in pertinens, or- 

 dinarily coming in contact with its edge and often bending a little to- 

 ward it. Striations of somites essentially as in the genotype. 



Most readily recognized by structure of the gonopods. The tongue 

 of the anterior median plate is broader than in the genotype; it is 

 similarly obtusely angulate on each side but is less narrowed distad, 

 being somewhat intermediate in form between those of the two pre- 

 ceding species. The mesodistal process of telopodite of anterior 

 gonopod longer than in P. pertinens, rising a little above level of 

 outer part, and notably stouter, broader especially distally where it 



