668 Cerapus 



twice as long as P* or 7*^^ Head with slight dorsal carina in front, rostnim 

 small. Side-plate 5 the largest. Eyes sraall, black. Antennae 1 and 2 

 subequal, shorter in Q than in ö. Antenna 1 in (5 rather more than half 

 as long as body; 1^* Joint stout, laterally compressed, lower margin with 

 carina prominent near base, 2^ and 3^ subequal, each rather longer than 

 1*^* and subequal to 3-jointed flagellum; 1^* Joint of flagellum rather longer than 

 2^ and S'^ combined. Antenna 2 slightly shorter, scarcely stouter; ultimate 

 Joint of peduncle a little longer than penultimate, flagellum scarcely as long 

 as ultimate, 3-jointed, 1^* Joint considerably longer than 2*^ and 3*^ combined. 

 Gnathopod 1 about as in C. sismithi (p. 666). Gnathopod 2 in d in general 

 shape as in C. sismithi, but front margin of 5*^ Joint convex, tooth of bind 

 margin more produced, its palmar margin shorter, occupied by a cavity and 

 a small tooth near the base of the 6*^^ Joint, which is only about twice as 

 long as broad, bind margin irregulär, minutely denticulate, finger stout, 

 serrulate, rather shorter than 6*^ Joint. Peraeopod 1 in d, the large glandulär 

 2*^ Joint rectangular, widest proximally, the projecting front angle narrowly 

 rounded; 4*^ Joint broader than long, 5*^ a little shorter, nearly Square. 

 Peraeopod 2 in d, 2*^ Joint broader in the middle, other joints as in peraeo- 

 pod 1. Peraeopod 1 in Q, 2*^ Joint proportionally broader than in d, and 

 angle different. Peraeopod 2 in q , 2^ Joint broader and more oval in outline 

 than in d. Peraeopod 3, 4*^^ Joint with long, narrow, spatulate process 

 behind, tipped with 1 short and 3 long plumose setae; the process overlapping 

 the 5^^ Joint, which is shaped like it and is apically squamose, carrying 1 seta. 

 Peraeopod 4, 2^ Joint about as long as 4*\ longer than broad. Peraeopod 5 

 a little more sleuder. Rest like C. crassicornis (p. 666). Colour almost black 

 from crowded specks of dark purplish pigment, extremities of appendages 

 colourless, semi-translucent. L. 4 — 5 mm. 



Tube free, reaching 7 mm, black, cylindrical, slightly enlarged at one or 

 both ends. 



North-Atlantic (Egg Harbor [New Jersey]; Vineyard Sound, depth 15 — 19 m; 

 Noank Harbor [Connecticutj). 



4. C. flindersi Stebb. 1888 C. f., T. Stebbing in: Rep. Voy. Challenger, v.29 

 p. 1163 1. 125 ; 1893 C. f., A. Della Valle in: F. Fl. Neapel, u. 20 p. 380 | 1894 C. f., G. 

 O. Sars, Crust. Norway, v. 1 p. 607. 



9 . Nearly allied to C.tubularis (p.667). Antenna 1, 2^ Joint much shorter 

 than 1^* or 3*^ Joint; flagellum as long as 3'^ Joint, 4-jointed, Antenna 2^ 

 penultimate Joint of peduncle proximally wider than antepenultimate, consider- 

 ably shorter than ultimate; flagellum rather longer than ultimate Joint of 

 peduncle, with 4 joints, 1^*^ the longest. Maxiila 1, outer plate with 10 spines 

 on apex, as compared with 9 in C. sismithi (p. 666). Peraeopod 1 as in 

 C. tubularis with 4*^^ Joint broader than long; but peraeopod 2 with 4**^ Joint 

 much longer than broad, fully as long as 5*^ and 6*^^ combined. Peraeopod 3 

 with the lobe-like 5*^^ Joint less produced than in C. tubularis; probably to 

 peraeopod 3 belong the broad marsupial plates, as in C. crassicornis (p. 666). 

 L. 5 — 6 mm. 



Flinders Passage [Nortli-Australia]. 



5. C. abditus R. Tempi. 1836 C. a., R. Templeton in: Tr. ent. Soc. London,^ 

 V. 1 p. 188 t. 20 f. 5a-k I 1888 C. a., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. 168 [ 

 1893 C. a., A. Della Valle in: F. Fl. Neapel, v. 20 p. 379 | 1840 Cerapodina abdita, H. 

 Milne Edwards, Hist. nat. Crust., v.3 p. 62. 



