512 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Remarks: The juvenile specimen of 141-D-3 is referred to this 

 species on the basis of the slender second articles of pereopods 3-5 

 on which the lower corners are quadrate (Schellenberg 1938a, figure 

 21g). Schellenberg adequately separated females and young of 

 M. quadrimana and M. pacifica, which in adult males have different 

 palmar sculpturing on the second gnathopods, by the narrow basal 

 articles of pereopods 3-5 in M. quadrimana and the broad ones in 

 M. pacifica. Dana's (1853) material had narrow basal articles; 

 Schellenberg found several specimens of this kind and I have found one ; 

 however, the Reish specimens of M. quadrimana cited above have 

 broad basal articles of those pereopods as figured herein; yet the 

 specimens are unconfuted M. quadrimana because of their gnathopodal 

 configurations. Schellenberg also found specimens of M. quadrimana 

 with shghtly broadened basal articles, suggesting that this species 

 has several phenotypes respective to this character. Maera pacifica 

 Schellenberg (1938a) may be simply another phenotype of M. quadri- 

 manxL based on second gnathopods rather than on pereopods 3-5. 



Distribution: Gilbert, Fiji, Hawaiian Islands; Ifaluk Atoll, Caroline 

 Islands, Eniwetok Atoll, Marshall Islands. 



Genus Parelasmopiis Stebbing 

 Parelasniopus albidus (Dana) 



Parelasmopus albidus (Dana). — Schellenberg, 193Sa, pp. 61-62, fig. 32. 



Material: Abbott station 141-D-3 (1 young). 



Distribution: Gilbert Islands; Samoa; Ifaluk Atoll, Caroline 

 Islands. 



Parelasmopus resacus, new species 



Figure 18 



Diagnosis of male: No segment dorsally dentate or carinate; 

 lateral lobes of head very broad, eyes large; accessory flagellum 

 composed of one long article tipped with a smaller one; apex of 

 maxillipedal palp article 3 tipped with a smaU granular bump; article 

 1 of mandibular palp scarcely longer than article 2, article 3 no longer 

 than 2; palm of gnathopod 2 oblique, bearing a small tooth near 

 hinge, a large medial process and a defining tooth, article 7 not 

 reaching end of palm; coxae 1 and 2 each with a ventral serration; 

 third pleonal epimeron with a tooth at lower hindcorner but not 

 serrate on either hind- or ventral edges; telson short. 



Female: Gnathopod 2 quite small. 



Holotype: USNM 106878 male, 4 mm. 



Type locaHty: Abbott station 145-C-3, Ifaluk Atoll, Oct. 21, 1953. 



Material: Abbott stations 81-B-4d (17), 102-B-2 (6), 145-C-3 

 (2), 152-D-3 (2). 



