MARESTB GAMMARIDEAN AMPHIPODA 



479 



1 and 2 slender, subequal in size and weakly chelate ; mouthparts from 

 lateral view conically grouped, upper lip substyliform, entire, mandible 

 substyliform, cutting edge slightly toothed, molar well developed, 

 ?barrel-shaped or cup-shaped, unknown if triturative, 3-articulate 

 palp attached level with molar; lower lip with Trischizostoma appear- 

 ance; inner plate of maxilla 1 heavily setose medially, palp 2-articulate; 

 maxilla 2 and maxillipeds normal; uropod 3 lacking rami, composed of 

 a simple, ovate peduncle; telson broader than long, entire, apically 

 concave. 



With strong resemblance to Sebidae in gnathopods but article 2 of 

 antenna 1 peduncle not elongate, upper lip elongate, mandibular 

 molar and palp strong, uropod 3 lacking any rami, telson very short, 

 etc. Species: 1, S. Georgia Islands, littoral. 



Figure 173. — Incertae Sedis: a, Sphaerophthalnius grohbeni Spandl (1924). Didymocheila 

 spongicola K. H. Barnard (1932): b, lateral aspect; c, telson and third uropods; d,e, gnatho- 

 pods 1, 2;/, mandible; g, lower lip. 



