Cerapus 



667 



9 unknown. — ö. Peraeon segment 2 not longer than anj of the 

 succeeding peraeon Segments. Head, rostrum acute, slightly depressed, 

 reaching beyond the slightly rounded lateral lobes. Side-plate 5 very broad, 

 front lobe rather deeper than ia the other side-plates. Eyes small, round. 

 Antenna 1 less than half as long as body; 1^* Joint shorter than 2*^ and 3^ 

 combined, distally widened; rounded process above produced over 2"i Joint, 

 process below acute ; 3*^ Joint shorter than 2^; flagellum rather longer than 1^* Joint 



ö"" Joint 



*"' Joint — 



2«' Joint 



2'' Joint 



4'h Joint - 



Fig. 112. 

 Gnathopod 2. 



Fig 113. 

 Peraeopod i. 



Fig. 112— lU. C. sismithi, cJ. 



Fig. 114. 

 Peraeopod 3. 



of peduncle, 5-jointed. Antenna 2 a little longer, ultimate and penultimate 

 joints of peduncle subequal; flagellum longer than ultimate Joint of peduncle, 

 4-jointed. Gnathopod 1, 5**^ Joint distally rather wider than 6*^, which is 

 widest near base; palm serrate, finely pectinate; finger occupying apex of 

 6*^ Joint, pectinate and with decurrent subapical tooth. Gnathopod 2 

 (Fig. 112). 2*1 Joint widest near base, subrectangular, 5**i rauch broader and 

 longer than 2*^, wide at base, much wider distally; front margin sinuous, bind 

 rather longer, ending in a tooth, a large convex denticulate process occupying 

 its palmar or distal margin between the tooth and base of strap-shaped, 

 much curved 6*^ Joint, which is nearly as long as ö*'^, 4—5 times as long 

 as broad, with tooth near base and adpressed teeth or spines near apex of 

 inner raargin; finger less than Ya as long as 6*^ Joint. Peraeopod 1 (Fig. 113), 

 the large 2*i Joint widest above, proximal front angle broadly rounded, 

 4*^ Joint much longer than broad. Peraeopod 2, 2*^ Joint broadly oval, 

 4**^ and h^^ joints longer than in peraeopod 1. Peraeopods 4 and 5, 2*^ Joint 

 well expanded, though successively rather uarrower and longer than 2^ Joint 

 of peraeopod 3. Peraeopod 3 see Fig. 114. Uropods 1—3 and telson as 

 in C. crassicornis. L. 3 mm. 



In cylindrical tubes of sand. 



Cumberland Bay [Kerguelen Island]. Depth 226 ra. 



3. C. tubularis Say 1817 C. t, Say in: J. Ac. Philad., t;. li p. 50, 96 t. 4 f. 7—11 | 

 1880 C. t, S. I. Smith in: Tr. Connect. Ac. v. 4 p. 277 t. 2a | 1888 C. t., T. Stebbing in: 

 Rep. Yoy. Challenger, v. 29 p. 101, 522 | 1893 Ct., A. DellaValle in: F. Fl. Neapel, 

 V. 20 p. 378 t. 55 f. 46—51 | 1894 C. t, G. 0. Sars, Crust. Nonvay, v. 1 p. 607. 



Body broad, depressed, shallow, in d tapering slightly and continu- 

 ously from head to telson, in o 4*'^ and 5^^ peraeon Segments each about 



