FLABELLIFERA • SPHAEROMATIDAE 



203 



Figure 89. Serolis mgrayi: A, 6; B, pereopod 1; C, pereopod 2, S . 



REMARKS Right into the 1980s this family was routinely divided into three 

 groups, based on the structure of the two posterior pairs of pleopods: 

 Platybranchiatae — pleopods 4 and 5 with both rami membranous and lack- 

 ing branchial pleats; Hemibranchiatae — pleopods 4 and 5 with branchial 

 pleats on endopods only; Eubranchiatae — pleopods 4 and 5 with branchial 

 pleats on both rami. These three "groups" were recognized formally as sub- 

 families by Hurley and Jansen (1977) but the names were not based on con- 



