. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 8-558 m (30 mfb)—1 specimen, 5 mm;st. 2757 (W), D, 490-455 m (2 mfb)—1 specimen, 5 mm. Bottom Sandy with mud at st. 2655 and sandy with stones at st. 2757. Remarks Specimens damaged, making accurate identification impossible; the species isprobably E. crosnieri. Eusiropsis Stebbing, 1899 Eusiropsis riisei Stebbing, 1897 Eusiropsis riisei Stebbing, 1897: 39. Material IKSAMT: st. 2576 (EM), D, PT 50-0 m—1 c\ mm; st. 2604 (MC), N, NBT 680 m—1 specimen, 9 mm; st. 2799 (SdM), N, NBT 300-200 m—1 ?, mm and 1 d1, 9
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum . 8-558 m (30 mfb)—1 specimen, 5 mm;st. 2757 (W), D, 490-455 m (2 mfb)—1 specimen, 5 mm. Bottom Sandy with mud at st. 2655 and sandy with stones at st. 2757. Remarks Specimens damaged, making accurate identification impossible; the species isprobably E. crosnieri. Eusiropsis Stebbing, 1899 Eusiropsis riisei Stebbing, 1897 Eusiropsis riisei Stebbing, 1897: 39. Material IKSAMT: st. 2576 (EM), D, PT 50-0 m—1 c\ mm; st. 2604 (MC), N, NBT 680 m—1 specimen, 9 mm; st. 2799 (SdM), N, NBT 300-200 m—1 ?, mm and 1 d1, 9 mm;st. 2805 (SdM), D, NBT 200 m—1 cf, 11 mm; st. 2827 (EM), N, PT 400 m—2 specimens,9 and 10 mm. Distribution Circumtropical, epipelagic. Eusirella Chevreux, 1908 Eusirella is a deep-sea genus. As a rule representatives are caught in depths exceeding800 m (Barnard & Karaman 1991), but in a few cases these amphipods have been reportedfrom subsurface waters, depths between 200-500 m (Birstein & Vinogradov 1970). 70 ANNALS OF THE SOUTH AFRICAN MUSEUM. =o R CI bo ^o ^ 1> i a ^ GAMMARIDEAN AMPHIPODS IN THE WESTERN INDIAN OCEAN 71 Eusirella 1 elegans Chevreux, 1908Fig. 6. Eusirella elegans Chevreux, 1908: 12; 1935: 103. Shoemaker, 1945: 198 (partim). Material TUA Sound: st. 2798 (SdM), N, 255-250 m (30 mfb)—2 juv., both 3 mm. Distribution North and South Atlantic and western Indian Ocean. Remarks The captured amphipods were first juvenile stages. Pereopods I and II had 6th articlesparticularly short and broad, which is typical of E. elegans. They probably belong to thisspecies. However, some differences were also noted: viz. mandibular palp apical articlecomparatively short and bearing one seta (not two). Maxilliped palp also has noticeablyfewer setae than shown by Chevreuxs figures. These are interpreted as being merelyage-related variability although the possibility that these animals belong to a new species(which is closely related to E. elegans) cannot be
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Keywords: ., bookcentury1800, bookdecade1890, booki, booksubjectnaturalhistory
