684 Ampithoe 



Side-plate 1 very large, extending forward to front of head, 2*^ much 

 smaller. Eyes ovate. Antenna 1 about half as long as body; flagellum 

 a little longer than peduncle. Antenna 2 rather shorter, peduncle not 

 longer than peduncle of antenna 1. Gnathopod 1, 5*^ Joint slightly dilated, 

 longer than 6*^, 6*^ not broader than b^\ ovate, palm oblique, not defined; 

 finger short. Gnathopod 2 much larger, 5**^ Joint short, cup-shaped, 6*^ 

 large, quadrate, bind margin produced so as to form a kind of thumb, 

 thougb not equalling the finger in length. Peraeopods 1 — 5, all having the 

 dilated base [2^ Joint] tapering to the distal extremity. üropod 3 reaching 

 beyond the other 2 uropods; peduncle (in figure very much thicker than 

 peduncles of uropods 1 and 2 and longer than their rami) with 2 short blunt 

 spines on upper margin, and 5 or 6 on upper part of apex; outer ramus 

 with 2 strong recurved hooks. Telson acute. L. 21 mm. 



Arctic Seas. 



3. A. cinerea (Hasw.) 1879 Amphithoe c. {^) -\- A. grandimanus (non A. grandi- 

 mana A. Boeck 1861!) (c5), Haswell in: P. Linn. Soc. KS. Wales, vA p. 269 t. 11 f. 4; 

 p.270 I 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. JSTeapel, v. 20 p. 459. 



Eyes round, projecting, almost colourless. Antenna 1 more than 

 half as long as body; 2^ Joint of peduncle longer than 1^*, 3*^ very short; 

 flagellum much longer than peduncle. Antenna 2 shorter; flagellum shorter 

 than ultimate and penultimate joints of peduncle. Gnathopod 1, 6*^ Joint 

 long ovate, setose, palm oblique, undefined. Gnathopod 2 in d much larger 

 than gnathopod 1; 6*^ Joint broad, irregularly ovoid; palm oblique, deeply 

 excavated, its border waved, defined posteriorly by a strong tooth. Gnatho- 

 pod 2 in Q, 6*^^ Joint broader but rather shorter than in gnathopod 1, palm 

 oblique, convex, devoid of teeth, but with a tubercle near finger -hinge. 

 Peraeopods 1 and 2 subequal, stoutish. Peraeopod 3, 2*^ Joint subcircular. 

 Peraeopods 4 and 5, 2'^ Joint oval, üropod 3 not extending so far as 

 uropod 2; outer ramus short, with 2 hooks, inner slightly longer, broader, 

 ^ith a few short setae. Telson subtriangular, blunt. Colour ashy grey. 

 L. 16 mm. 



Port Jackson [East-Auatralia]. 



4. A. longimana (S. I. Sm.) 1873 Amphithoe l, (S. I. Smith in:) A. E. Verrill 

 in: Rep.ü. S. Fish Comm., v.l p. 563 | 1893 A. rubricata (part.), A. Della Valle in: F. 

 Fl. Neapel, v. 20 p. 456. 



Eyes round, black (in spirit). Antenna 1 in d slender, as long as body, 

 2** Joint rather longer than 1^*-, 3^ about half as long as 2^; flagellum about 

 twice as long as peduncle. Antenna 2 stouter, rather shorter; ultimate Joint of 

 peduncle considerably longer than penultimate, subequal to flagellum. Antenna 2 

 in 9 shorter and more slender. Gnathopods 1 and 2 in d* stout and long. 

 Gnathopod 1 in d, 5*^ Joint as long as 6*^ both setose, 6*^ much more than 

 twice as long as broad, oblong; palm very short, transverse, much overlapped 

 by stout finger. Gnathopod 2 in d, 5*** Joint short, cup-shaped, 6*'' as long as in 

 gnathopod 1, much broader; palm oblique, with deep sinus close to projecting 

 defining angle. Gnathopod 1 in 9 , 5*^ and 6*^ joints shorter, proportionally 

 broader; palm more oblique. Gnathopod 2 in Q , 6*'^ Joint short, somewhat 

 oval; palm with slight defining prominence. Peraeopods 4 and 5, 2^ Joint 

 with bind margin unarmed. L. 6 — 9 mm. 



North- Atlantic (New Jersey, Long Island, Vineyard Sound). » 



