ßiancolina, Jassidae 647 



1. B. cuniculus (Stebb.) 1874 Ämphithoe c, T. Stebbing in: Ann. uat. Hist., 

 ser. 4 t). 14 p. 112 t. 11 f. 1, la— e | 1893 A. c. -\- Biancolina algicola (? juv.), A. Della 

 Valle in: F. El. Neapel, t;. 20 p. 460 t. 57 f. 38; p. 562 t. 3 f. 11, t. 32 f. 38-53 | 1899 

 B. c, T. Stebbing in: Ann. nat. Hist., ser. 7 u3 p. 350. 



lutegument brittle. Head with bulging cheeks, rabbit-like in profile, 

 attachment of antennae prominent. Side-plates not deep, but shaped as in 

 Ampithoe (p. 631). Pleon segment 3, postero-lateral corners rounded. Eyes 

 small, round, red. Antenna 1, 1^* Joint a little longer than 2*^', which is 

 twice as long as 3^; flagellum sometimes twice as long as peduncle, with 18 

 nnequal joints, some with sensory filaments. Antenna 2, ultimate Joint of 

 peduncle rather shorter than penultimate, flagellum shorter than peduncle, 

 5-jointed. Gnathopod 1, 2"^ Joint expanded distally, 3*^ and 4*'^ equal, 5*^ 

 widening a little distally, scarcely longer than 6*^^ which has a small slightly 

 produced palm, much overlapped by the small and stout but acute finger. 

 Gnathopod 2 massive (at least in d); 2'^ Joint expanded, 5*^^ short, cup- 

 like, ^^^ very large, broad and long; palm excavate, defined by a tooth; 

 finger large, arcuate, obliquely truncate, leaving cavity between its apex 

 and its minute nail. Peraeopods 1 and 2, 2^ Joint expanded, oval, 4**^ short 

 and Wide, 6*^ longer than 5*^ Peraeopod 3 short, 2*^ Joint rounded, expanded 

 proximally, 3^ — 5*^ short. Peraeopods 4 and 5 rather long, 2*^ Joint somewhat 

 expanded, narrowed distally, 4*^ and 5**1 moderately long, 6*^^ longer. üropod 1, 

 peduncle long, setose, with an oval process at apex, the slightly unequal 

 rami rather shorter than peduncle. üropod 2 shorter; some setae on 

 peduncle, which is as long as the rami. üropod 3, peduncle short, much longer 

 than the small broad rami, inner with 4 slight spinules. Colour bright 

 yellow. L. 4*5 mm. 



Bay of Naples, depth 1 — 2 m; Torbay, within tide-marks. 



37. Farn. Jassidae 



1899 Ischyroceridae, T. Stebbing in: Ann. nat. Hist., ser. 7 ?;. 4 p. 211. 



Head, lateral lobes often somewhat prominent. Side-plates variable 

 in relative proportions, 4:^^ with bind margin usually not excavate (Fig. 111 

 p. 650). Antennae 1 and 2 variable in relative proportions; accessoiy flagellum of 

 antenna 1 distinct or indistinct, but never large. Upper lip with pointed 

 epistome. Lower lip and mouth-parts in general as in Aoridae (p. 585), except 

 that the 3^ Joint of mandibular palp is shorter tlian 2*^, laminar, and that the 

 maxillipedsinWyvillea (p. 648) have inner and outer plates rudimentary and palp 

 3-jointed. Gnathopods 1 and 2 subchelate, 2* the larger, often gTeatly 

 modified in d. Peraeopods 1 and 2 glandulär. Peraeopod 3 reverted. 

 Peraeopod 5 the longest. üropods 1 — 3 biramous. üropod 3, rami very 

 Short, the outer uncinate and usually surmounted by denticles. Telson simple. 



Marine. 



5 genera, 21 accepted species and 5 doubtful. 



Synopsis of genera: 



J Maxillipeds, palp 3-jointed 1. Gen. Wjrvillea . . . p. 648 



) Maxillipeds, palp 4-jointed — 2. 



i Antenna 1, accessory flagellum indistinct . . 2. Gen. Farajassa . . . p. 649 

 \ Antenna 1, accessory flagellum distinct — 3. 



