Cerapus, Chevreuxius 669 



Body elongate. Head large, laterally subtriangular, doi*sally quadrate, 

 most dilated anteriorly, a minute rostrum projecting forwards; front in lateral 

 view almost vertical. Eyes a little prominent, small, round, black. Antenna 1 

 tapering, about % as long as body; 3 joints of peduncle subequal or 1^*^ 

 rather the shortest, 1^* in ligure with sub-basal widening; fiagellum 5-jointed. 

 Antenna 2, ultimate and penultimate joints of peduucle longer and stouter 

 than those in antenna 1; flagellum o-jointed. Anteunae 1 and 2, setae of 

 peduncle in double rows, longer towards apices of joints, joints of flagella 

 with spines. Gnathopod 1, 5*^^ Joint scarcely as long as 6*^ distally a 

 little widened and (in figure) produced to a shoit tooth, 6*'^ narrowly oblong, 

 at the apex transversely truncate but very narrow; the much curved finger, 

 though Short, reaching much beyond it. Gnathopod 2, 5**^ Joint extremely 

 large, subrectangular, hind margin produced to a strong tooth, a smaller 

 one adjacent. filliug up the space between it and base of the slightly curved 

 6^^ Joint, which is widest at base, has a concave smooth hind margin and 

 its apex occupied by the strong, much curved, but not very long finger. 

 Peraeopods 1 and 5 in harmony with genus, L. about 3 mm. 



Tube, nearly 5 mm loug, papyraceous, cylindrical, head of animal protrusible 

 alternately from either end. 



At Mauritius or on the way thither from England. 



6. C. calamicola (Giles) 1885 Cyrtophiuni c, G. M. Giles in: J. Asiat. Soc. 

 Bengal, r. 54 p. 54 t. 1 | 1888 Cerapus c, T. Stebbing in: Rep. Voy. Challenger, u 29 

 p. 563 I 1893 C. c, A. Della Valle in: F. Fl. Neapel, f. 20 p. 380. 



Body elongate, peraeon segments 4 — 6 the longest. Head subquadrate, 

 rather long, rostrum small. Side-plates 5 and 6 (in figure) much the largest. 

 Eyes (in figure) small, dark. Antenna 1 more than half as long as body; 

 3 joints of peduncle subequal, 1^* the stoutest, slightly widened near base; 

 flagellum 3— 6-jointed. Antenna 2 rather longer, ultimate Joint of peduncle 

 rather longer than penultimate; flagellum with 3 — 6 equal joints (in figure 1*** 

 much the longest). Gnathopod 1, 6**» Joint long, ovate; finger as long as 

 6*^^ Joint, inner margin very finely serrate. Gnathopod 2 very large, ö^^ Joint 

 triangulär, hind margin produced to a strong incurved tooth, separated by 

 a rather broad cavit>" from a smaller, biunter tooth, near base of the long, 

 ovate 6*'' Joint (in figure rather rectangular) ; finger as long as 6*^ Joint, 

 curved, acute, inner raargin with a peculiar serrature of Square, chisel-edged 

 teeth. Peraeopod 3, 2*^ Joint (in figm*e) much longer than broad; finger 

 having hind margin provided with two curious short finger-like processes. 

 Peraeopods 4 and 5, 2<^ Joint broadly oval, much more expanded than in 

 peraeopod 3 ; finger rounded and provided with a large tuft of hairs. Pleopod 3 

 the smallest. üropod 1, inner ramus 2-jointed (?l-jointed, tipped with a 

 spine). üropod 2, inner ramus rudimentary (wanting?). Colour golden 

 brown with deep chocolate blotches. L. 3 — 5 mm. 



Tube 5 — 10 mm long, brown banded with light yellow and black. 

 North- West of Bay of Bengal (Orissa coast). 



5. Gen. Chevreuxius Bonnier 



1896 Chevreuxius (Sp. un.r C. grandirnanus), J. Bonnier in: Ann. Univ. Lyon, 

 </.26 p.663. 



9 unknown. — ö. Body elongate, depressed. Side-plates very small, 

 not in contact. Eyes wanting. Antennae 1 and 2 with the peduncle long 



