Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . body strongly spinose. The present material agrees with Vanhoffens description of Echinomunnahorrida in the spinose body, the position of the eyes, the construction of theantennule with one long flagellar segment plus several short segments, in thestructure of the maxilliped and the first pereiopod. The main differences betweenE. horrida and E. uroventralis lie in the number of dorsal pereional spines,and especially in the pleonal structure with the ventrally inserted uropods.The Antarctic species possesses five proximal

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Annals of the South African MuseumAnnale van die Suid-Afrikaanse Museum . body strongly spinose. The present material agrees with Vanhoffens description of Echinomunnahorrida in the spinose body, the position of the eyes, the construction of theantennule with one long flagellar segment plus several short segments, in thestructure of the maxilliped and the first pereiopod. The main differences betweenE. horrida and E. uroventralis lie in the number of dorsal pereional spines, and especially in the pleonal structure with the ventrally inserted uropods.The Antarctic species possesses five proximal spines, while the uropods areinserted laterally, and the pleon is distally rounded-truncate. In E. uroventralisthere are two strong lateral spines, plus two submedian distal spines with theuropods inserted beneath them. The present species is thus placed in the genus Echinomunna with somereservations, and with the necessity to enlarge the definition of the genus toinclude uropods which are inserted either laterally or ventrally. 316 ANNALS OF THE SOUTH AFRICAN MUSEUM. Fig. 26. Echinomunna uroventralis sp. nov.A—Pereiopod I; B—Pereiopod VII; C —Right mandible; D—Left mandible. ISOPODAN AND TANAIDACEAN CRUSTACEA FROM SOUTHERN INDIAN OCEAN 317 Munna (Uromunna) nana Nordenstam Munna nana Nordenstam, 1933: 222, figs. 56-57.Munna nana forma a Menzies, 1962: 42 fig 5. Previous records Chile, Falkland Islands. Material AMS a4CI2841a4864a9496103142b173 Remarks 1 (J 3 c?c5 ?*. * 2??2?? 1?1 ?1 ? 1 ovig. ?4 ovig. ?? 2 ovig. ??1 ovig. ? 2 ovig ??1 ovig. ? St Paul B19D366c 7a 8c 19 22a 22c 23a 30a 30b 77a 77b 90 1 6 2<J<J 3<J<J 1 (J 2<y<? 1 $ 1 ovig. ?1 ovig. $ 2 ovig. ?? 1 ovig. ? 2 ovig. ?? 3 ovig. ??1 ovig. ?1 ovig. ?1 ovig. ? 1 ovig. $5 c?c? 10 ?? 2 ovig. ?? Id 2?? 1 ?3?? 1 ?1 $ Slight differences between the present material and Menziess forma aas well as the forma typica are apparent. The last segment of the antennalpeduncle is not twice the length of the pen