Ceradocus 431 



Challenger, f. 29 p. 1008 t. 95, 96 | 1893 Ceradocus rühr omaculatus, A. Della Valle in: 

 F. Fl. Neapel, v. 20 p. 720 | 1899 Cr., T. Stebbing in: Tr. Linn. Soc. London, ser. 2 

 V. 7 p. 426 j 1862 Megamoera serrata, Bäte, Cat. Amphip. Brit. 3Ius., p. 22H t. 39 f . 5 | 

 1879 Melita? ramsayi -\- Moera riibro-maculata -\- M. spinosa -\- M. ramsayi, Haswell 

 in: P. Linn. Soc. N. S. Wales, r. 4 p.246 t. 10 f. 1; p. 267 t. 10 f. 4; p. 268 t. 10 f. 5,- 

 p. 334 I 1885 Moera festiva, Chilton in: P. Linn. Soc. N. S. Wales, v.9 p.l037 t. 46 f. 2. 



Pleon Segments 1 — 6 dorsally serrate, witb setules in the serrations. 

 Segment 1 with 15 teeth, 2^ with 17, 3^ with 15, 4^^ with 9, 5"' with 7, 6^^ with 3, 

 central most prominent, especially in segments 3 and 4, but tliis ornamentation 

 is very variable. Head, lateral lobes nasiform, post-antennal corners 

 acute. Side-plates 1 — 4 shallow, not deeper than 5*^', 1^* a little outdrawn, 

 acute, 2^ — 4*^^ subquadrate with rounded angles. Pleon segments 1 — 3, 

 postero-lateral corners acute, in segments 1 and 2 and sometimes in 3 lower 

 margin a little serrate, and in segraent 3 bind margin of the corner serrate» 

 Eyes dark, oval, close to margin of lateral lobes of head. Anteuna 1 half as 

 long as body, 2<^ Joint more slender than 1^*, but as long or a little longer, 

 3*^ about ^L as long as 2^, flagellum shorter than peduncle, 10— 33-jointed, 

 accessory flagellum also variable, 4 — 12-jointed. Antenna 2, giand-cone nearly 

 reaching end of long antepenultimate Joint of peduncle. this and ultimate Joint 

 much shorter than penultiraate, flagellum short, with 18 joints (to match 33 

 in flagellum of anteuna 1). Upper lip with almost semicircular margin, 

 Lower lip, principal lobes dehiscent, with little quadrate corner at top ot 

 inner margin. Mandible, 3^ Joint of palp much shorter than 2^\ with long apical 

 spines. Gnathopod 1 , ö'^^'joiut longer than 6^^ both spinöse, 6*^ rather broadly o vate, 

 palm oblique, slightly convex, finely denticulate, finger fitting palm. Gnathopod 2 

 in d, 5''^ Joint short, cup-shapcd, much naiTower than the massive 6^^, which 

 is distally widened, bind margin nearly straight, front very convex. palm 

 defined by a strong tooth between palmar spines, very oblique, with 1 or 2 

 gaps, or with variable denticulation ; finger strong, much or little curved. 

 Peraeopods 1 and 2 slender, 1^* rather longer than 2'^. Peraeopods 3 — 5 

 rather stout, 3"^ much shorter than the following, 4*** rather longer than 5*^^, 

 2^ Joint narrowly oblong in peraeopod 3, broader in the others. üropods 1 

 and 2 not or scarcely reaching beyond peduncle of uropod 3. üropod 3, 

 rami subequal, broad and long, strongly serrate and spined on both margins, 

 apices narrow, not acute. Telson short, broader than long, cleft nearly to 

 base, almost the füll width between the acute apices, inner margins of the 

 lobes siuuous. Colour, spotted with crimson above, white below. L. reaching 

 23 mm. 



Australian and Tasmanian waters, and off Cape Agulhas. Depth 9 — 282 m. and 

 in sea-weed on sandy beach. 



2. C. semiserratus (Bäte) 1862 Megamoera semiserrata, Bäte (& Westwood), 

 Brit. sess. Crust., v. 1 p. 401 f. j 1862 M. S-, Megamaera semmisefrata, Bäte, Cat. Amphip. 

 Brit. Mus., p.226; t.39 f. 6 | 1869 Maera semiserrata, (A. M. Norman in:) G. S. Brady & 

 D. Robertson in: Ann. nat. Hist., ser. 4 «. 3 p. 359 | 1889 M. s., A. M. Norman 

 in: Ann. nat. Hist., ser. 6 v.i p. 127 ; 1899 Ceradocus semiserratus, T. Stebbing in: Tr. 

 Linn. Soc. London, ser. 2 v.7 p. 426 1 1S9'6 C. fasciatus (part), A. Della Valle in: F.Fl. 

 Neapel, v. 20 p. 721. 



Body slender, smooth. Side-plates 1 — 4 each with a tooth at the 

 lower bind corner. Pleon segment 3. postero-lateral corners rather produced, 

 smooth below, but with the bind margin regularly serrate. p]yes narrowly 

 reniform. Antenna 1 about half as long as body, 2*^ Joint rather longer 

 than l^S 3*^ less than half as long as l'^S flagellum rather longer than peduncle 



