. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 438 DISCOVERY REPORTS The specimens from the east coast of Africa are not distinguishable from the Atlantic specimen. Although the oldest of these three specimens is more than twice the size of the smallest one, it diflFers very little in degree of development. The antenna shows a division into flagellum and peduncle, and the latter is rather stout, with a small outer pro- jection (Fig. 42 b). The maxilla is not expanded, and without setae, and max- illipede i is a small papilla. In the speci- m
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 438 DISCOVERY REPORTS The specimens from the east coast of Africa are not distinguishable from the Atlantic specimen. Although the oldest of these three specimens is more than twice the size of the smallest one, it diflFers very little in degree of development. The antenna shows a division into flagellum and peduncle, and the latter is rather stout, with a small outer pro- jection (Fig. 42 b). The maxilla is not expanded, and without setae, and max- illipede i is a small papilla. In the speci- men of 20 mm. this appendage is not traceable at all. The abdomen in the two smaller specimens is unsegmented, with- out trace of pleopods, and the uropods are represented in the larger specimen by small folds. In the specimen of 37 mm. the abdomen is still not much more de- veloped, but the pleopods are represented by small simple lobes and the uropods are small and bilobed. This form of Phyllosoma is very re- markable by reason of the large size reached without much progress in devel- opment of antennae, mouth parts and abdomen, while leg 5, which is usually late in developing, is fully formed and provided with an exopod in the smallest specimens known. Phyllosomas of precisely similar form have been described by Guerin, Richters and Spence Bate. Spence Bate's speci- men, of 30 mm., was taken in the West Indies and may well belong to the same species as the one from St. 691. Phyllo- soma guerini, de Haan, also has an exopod on leg 5, but is otherwise very different. A Phyllosoma from China described by Richters (1873, pi. 34, fig. i) seems to belong to the same genus as P. guerini, and there is reason to believe that this genus may be Ibactis (Balss, 1914, p. 81). Richters included the type under discussion in the "Phylicsomes brevicaudes" of Milne-Edwards, and refers them to the Scyllaridae. The general form of the body is so. 4mm Fig. 42. Parribacus a. Specime
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