Maera 439 



marus elongatus, (H. Frey &) R. Leuckart, Wirbell. Th., p. 160 | 1859 G. laevis, R. M. 

 ßruzelius in: Svenska Ak. Handl.. n. ser. «. 3 nr. 1 p. 60 t. 2 f. 10 \ 1862 Megamoera 

 longimana -f- M. othonis, Bäte & Westwood, Brit. sess. Crust., v. 1 p. 403 f. ; p. 405 f. | 

 1896 Maera brooki, T. Scott in: P. phys. Soc. Edinb., v. 13 p. 173 t. 5 f. 1—6. 



Body moderately coiripressed, back smooth. Head, lateral lobes angulaiiy 

 produced. Side-plate 1 produced in front, obtusely acuminate, 2"^ deeper, 

 4^^ quadrate, smaller than 3^. Pleon segment 3, postero-lateral corners 

 acutely produced and serrate above and below. Eyes oval reniform, dark. 

 Antenna 1 slender, more than -/., length. of body, 2'^ Joint longer and narrower 

 than 1®*, 3'^ short, flagellum longer than peduncle, 24 — 48-jointed, accessory 

 flagellum 6- or 7-jointed. Antenna 2 about half as long, ultiraate and 

 penultimate joints of peduncle subequal, flagellum short, 12— 24-jointed. 

 Upper lip, apical margin faintly concave. Mandibular palp slender, 3^ Joint 

 as long as or longer than 2^. Maxiila 1, inner plate uarrow, with 3 setae 

 at apex. Gnathopod 1 slender, setose. 6*^ Joint about as long as 5*^ oblong 

 oval, palm very oblique, ill-defiued, finger small. Gnathopod 2 in 9 rather 

 sti'onger than gnathopod 1, 5*^ Joint distally widened and quadrate, 6*^ rather 

 longer, narrowly oblong, palm oblique, not strongly defiued. Gnathopod 2 

 in ö much stronger, 5*'^ Joint short, broadly cup-shaped, 6*^^ elongate, oblong 

 oval, palm minutely serrate and imperfectly defined or non-existent; tinger 

 half as long as 6*'^ Joint or longer than it. Peraeopods 1 and 2 slender 

 and shoi-t. Peraeopods 3 — 5, 2*^ Joint well expanded, oval, forming a free 

 bind Corner, bind margin serrate. Uropod 3 reaching much beyond the 

 others, rami narrowly lanceolate, subequal. Telsou rather longer than peduncle 

 of uropod 3, lobes naiTOwly conical, acute, divergent, with spinule in uotch a 

 little way up inner margin. Colour whitish, blotched with rose. L. 11 — 35 mm. 



North -Atlantic, North-Sea and Skagerrak (ßohuslän; Norway; Heligoland; 

 British Isles; West-France); Mediterranean (Älarseilles). 



12. M. mastersii (Hasw.) 1879 Megamoera m., Haswell in: P. Linn. Soc. 

 N.S.Wales, vA p.265 t. 11 f. 1 | 1899 Afaera »t., T. Stebbing in: Tr. Linn. Soc. London, 

 ser. 2 u7 p. 426 | 1884 Megamoera thomsoni. Miers in: Rep. Voy. Alert, p. 318 t.34 f. B j 

 1893 Ceradocus rubromaculatus (part.), A.DellaValle in: F. Fl. Neapel, i:20 p. 721. 



Body slender, back smooth. Head, lateral lobes rather narrowly produced. 

 Side-plates 1 — 4 rotundo-quadrate, not very deep but much deeper than the 

 3 following. Pleon segment 3, postero-lateral corners quadrate with their 

 bind margin denticulate. Eyes narrowly reniform. Antenna 1, 2^ Joint of 

 peduncle little longer than 1^*, 3*^ short, flagellum as long or nearly as long 

 as peduncle, accessoiT flagellum 4-jointed. Antenna 2, peduncle as long as 

 that of antenna 1 or a little longer, flagellum subequal to ultimate Joint of 

 peduncle. Gnathopod 1, 5*^ and 6^^ joints slender, equal; palm straight, 

 smooth, oblique, bind margin strongly convex, with-4 small teeth. Gnatho- 

 pod 2 much larger, 4*^ Joint produced into a small acute tooth, 6*^ oval, 

 palm oblique, irregularly denticulate, defined by a small tooth. Peraeopods 3 — 5, 

 2^ Joint well expanded, oval, with free corner, bind margin serrate, peraeo- 

 pod 5 scarcely so long as 4*^. Uropod 3 reaching much beyond the others, 

 peduncle short and broad, rami equal, broadly lanceolate. Telson cleft to 

 base, lobes bluntly conical, a little divergent, with 3 small teeth at the 

 extremity and a notch armed with a single seta near the distal end of the 

 inner border (Haswell), or with a row of spinules aloug the inner maugin 

 to the apex (Miers). Colour (in spirit) light yellowish brown. L. 11 mm. 



Port Jackson [East-Australia]; Torres Strait (Albany Island, Pi-ince of W^ales' 

 Channel and Thursday Island). Deptli 7 — 17 ra. 



