. Fig- 54- Hoplopleon medusarum, a. Gnathopod 1, with spine further enlarged. b. Gnathopod 2. c. Pleon segments 3-6. Description. Very closely resembling australis, except in gnathopods 1 and 2 and peraeopods 4 and 5. Gnathopod 1, 5th joint with 6-7 strong spine-setae on lower margin and apex, 6th joint ovate, palm ill-defined, with 4 strong spine-setae, finger with spinules along inner margin and a denticle near apex. Gnathopod 2, 5th joint with 6 strong spine-setae on lower apex, 6th widening slightly to the transverse concave palm, defining angle rounded, with 4 strong spine-setae. Pe


. Fig- 54- Hoplopleon medusarum, a. Gnathopod 1, with spine further enlarged. b. Gnathopod 2. c. Pleon segments 3-6. Description. Very closely resembling australis, except in gnathopods 1 and 2 and peraeopods 4 and 5. Gnathopod 1, 5th joint with 6-7 strong spine-setae on lower margin and apex, 6th joint ovate, palm ill-defined, with 4 strong spine-setae, finger with spinules along inner margin and a denticle near apex. Gnathopod 2, 5th joint with 6 strong spine-setae on lower apex, 6th widening slightly to the transverse concave palm, defining angle rounded, with 4 strong spine-setae. Peraeopods 4 and 5, 2nd joint with hind margin convex, not straight or nearly so as in australis, the contrast most noticeable in peraeopod 4. Remarks. Whereas the specimens of australis were found amongst littoral Hydroids, Algae, etc., the present specimens were extracted from a jellyfish. Family LEUCOTHOIDAE Stebbing, 1906, p. 161. Schellenberg, 1928 (Jr. Zool. Soc. Loud., 1928, pt. 5), p. 635 (new genus). Genus Leucothoe Leach. Stebbing, 1906, pp. 163, 724. 14


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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti