Ampithoc 637 



In mtiny respects resembliug Suuainfthitoepelagica (p. 645). Body robust, 

 dorsally roundpd, smooth. Side-plates (or soiue of them) with setae on lower 

 margin. Eyes small, subrotund, whitish. Antenna 1 more than half as long 

 as body; 1^* Joint thick, 2^ very little shorter, 3*^ small; flagellum 30—40- 

 jointed. Antenna 2 shorter, stout, almost pediform; ultimate and penultimate 

 joints of peduncle equal; flagellum scarcely half as long as peduncle, tapering, 

 12- or 13-jointed. Lips not described. Mandibular palp long, thin; 2*^ Joint 

 the longest, 3<^ with apical serrulate setae. Maxiila 1, inner plate with 1 seta, 

 outer with 10 spines; palp slender, with 5 or 6 serrate spines. Maxiila 2 

 and maxillipeds normal. Gnathopod 1, 5*^ Joint shorter than 6*^, lobed and 

 setose on bind margin, 6*^ narrowly oblong; palm short, transverse, overlapped 

 by finger. Gnathopod 2 in d considerably larger; 6*^ Joint pretty sti'ongly 

 tapering. Gnathopod 2 in 9 like gnathopod 1, but with shorter 5**^ and 

 broader 6^^ Joint. Peraeopods 1 and 2, 2^ Joint broad, oval, laminar, 4*^ 

 widened distally. Peraeopod 3 stout, 2*^ Joint broader than long, the following 

 joints stout, not widened, 6*^ spinöse on both margins; finger short, strong, 

 much curved. Peraeopod 4 longer and more slender, 2* Joint long oval, 

 finger fitted for grasping. Peraeopod 5 slightly longer than peraeopod 4. 

 Branchial vesicles oval. Marsupial plates narrow, long, with long setae. 

 Pleopods, rami long, 30-jointed. Uropods 1 and 2, outer ramus shorter 

 than inner, broader, and more spinöse, inner of uropod 2 at least as long 

 as peduncle, the rest shorter. üropod 3 shorter but stouter than uropod 2; 

 peduncle twice as long as rami; outer ramus with the usual 2 hooks, and several 

 rows of microscopic spinules, inner rather shorter but broader, nearly circular, 

 armed with some setae and 2 little stout spines. Telson small, tiiangular, 

 with 2 setae on the margin. Colour in life a veiy dark olive-green. L. 

 reaching 19 mm. 



South-Pacific (Valparaiso near the shore); Atlantic (Brazil)? 



11. A.brevipes (Dana) 1852 Amphithoeb., .I.D. Dana in: P.Amer. Ac, v.2 p.216 | 

 1853 & 55 A. b. -\- ^ A. peregrina (juv.), J. D. Dana in: U. S. expl. Exp., v. 13ii p. 936, 

 941; t. 64 f. 5a— n; p. 940 t. 64 f. 4a, 4b. | 1862 A.falklandi (juv.?) -{-A.p.-\- A. b., Bäte, 

 Cat. Ainphip. Brit. Mus., p. 237 t. 41 f. 6; p. 247 t. 43 f. 1; p.248 t. 43 f. 2, 2i, 2u, 1 u | 

 1893 A. rubricata (part.)?, A. Della Valle in: F. Fl. Neapel, u 20 p. 456, 459. 



Apparently very near to A. femorata. Head, lateral lobes very 

 little produced. Side-plate 1 scarcely produced forward, 5^^ the largest. 

 Eyes round. Antenna 1 about half as long as body; 1^* Joint longest; 

 flagellum more than twice as long as peduncle. Antenna 2 much shorter, 

 ultimate and penultimate joints of peduncle equal; flagellum 15-jointed. 

 Mandibular palp rather slender; 3^ Joint with 5 apical setae. Gnathopod 1, 

 5*^ Joint shorter than 6*^, ^^^ oblong; palm short, transverse; finger longer 

 than palm. Gnathopod 2 in d, 5*^ Joint small, cup-shaped, 6*^ large, sub- 

 ovate, nan'owest at finger-hinge, near to which there is a minute acute 

 tooth; the palm in general being undistinguished from the bind margin, 

 finger long. Gnathopod 2 in Q scarcely distinguishable from gnathopod 1. 

 Peraeopods 1 and 2, 2^ Joint dilated, 4*^ Joint distally lobed. Peraeopods 4 

 and 5 considerably longer than peraeopod 3. üropod 3 normal, reaching 

 beyond uropod 2. Telson not described. L. 18 mm. 



South- Atlantic (Tierra del Fuego, depth 9m; Falkland Islands); South-Pacific 

 {Valparaiso)? 



12. A. brasiliensis (Dana) 1853 & 55 Amphithoe b., J. D. Dana in: U. S. expl. 

 Exp., ul3ii p.943; t. 64f. 6 a— n i 1893 A. rubricata (part.), A. Della Valle in: F.Fl. 

 Neapel, v. 20 p. 456. 



