f T 

 l T 



1 50 Amphilochus 



iGnathopod 2, process of 5th Joint overlapping 

 palm of 6th 2. A. neapolitanus . p. 150 

 Gnathopod 2, process of 5th Joint not overlapping 

 palm of 6th — 3. 



Telson longer than 3 times the breadth .... 3. A. tenuimanus . . p. 150 

 elson shorter than 3 times the breadth — 4. 



, j Mandibular palp, 3d Joint longer than 2d . . . 4. A. marionis . . . p. 151 

 \ Mandibular palp, 3<i Joint shorter than 2d . . . 5. A. brunneus . . . p. 151 



1. A. manudens Bäte 1862 A. m., Bäte, Cat. Amphip. Brit. Mus., p. 107 t. 17 

 f. 6 I 1892 A.m., G. O. Sars, Crust. Norway, ».1 p.217 t.74 | 1893 A. m., A. DellaValle 

 in: F. Fl. Neapel, y.20 p.594 t. 59 f. 4 | 1871 A. manuidens, A. Boeck in: Forh. Selsk. 

 Christian., 1870 p. 130 | 1876 A.m., A. Boeck, Skand. Arkt. Amphip., v.2 p. 432 t. 11 

 f. 1 I 1876 A. concinna -f- Callimerus acudigitata, T. Stebbing in: Ann. nat. Hist., ser. 4 

 ».18 p.443 1. 19 f. 1— Ib; p. 445 t. 20 f. 3 | 1890 A. boeckii, Meinert in: Udb. Hauchs, 

 V. 3 p. 160. 



Head, rostrum longer in (5 than in Q , lateral corners ending in a sharp 

 deflexed point. Side-plates deeper in 9 than in d, 1«* subquadrate, 2*^ and 

 3*^ with lower margin coarsely dentate, 4*^ with lower and bind inargin 

 denticulate. Pleon segment 3, postero-lateral angles produced, ending in small 

 acute point. Eyes round, dark red. Antenna 1, 1*** Joint apically indented, 

 a little longer than 2^. 2^ than 3*^, flagellum in 9 about 6-jointed with slender 

 sensory setae, in d longer, with band-like sensory filaments. Antenna 2 in 9 

 subequal to antenna 1, in d much shorter, ultiraate Joint of peduncle shorter than 

 penultimate, flagellum about half length of peduncle. Mandible, 3*i Joint of palp 

 as long as 1^' and 2*^ combined. Gnathopods 1 and 2, H*^ Joint widening to 

 convex, rather oblique, denticulate palm, front margin apically produced to an 

 acute tooth, flnger slender, curved, reaching beyond the palm, proximal half of 

 inner margin denticulate. In gnathopod 1, 5*'^ Joint only moderately produced, 

 in the much larger gnathopod 2, narrowly produced as far as palm margin, 

 which forms an angle with the bind margin. Peraeopods 3 — 5, 2^ Joint 

 oval, serrulate on bind margin, largest in peraeopod 5. üropod 3 projecting 

 beyond uropods 1 and 2, rami very nan'ow, with scattered spiuules. Telson 

 scarcely more than half length of peduncle of uropod 3, quite simple, acute, 

 length nearly thrice breadth. Colour brownish to reddish. L. 9 5, d 4 mm. 



Arctic Ocean, North-Atlantic, North-Sea and Skagerrak (Norway, Greenland, 

 France, Great Britain); Kattegat. Depth 188 m. 



2. A. neapolitanus Della Valle 1893 A. n., A. DellaValle in: F. Fl. Neapel, 

 ».20 p.595 t. 29 f. 16, 17. 



Eyes maroon, reticulated with white. Gnathopods 1 and 2, front margin 

 of 6*^1 Joint not produced into an apical tooth; in gnathopod 1 process of 

 5*^ Joint not reaching palm of the broad 6*^; in gnathopod 2, 6**^ Joint larger 

 than in gnathopod 1, process of 5^^ Joint overlapping the palm with a beut 

 point. Other appendages in agi*eement with A. brunneus (p. 151). Colour 

 greenish-brown in part, in part pearly white lightly flecked with green. 

 L. 3 — 4 mm. 



Gulf of Naples. Among algae. 



3. A. tenuimanus Boeck 1871 A. t., A. Boeck in: Forh. Selsk. Christian., 

 1870 p. 131 I 1876 .4. t., A. Boeck, Skand. Arkt. Amphip., v.2 p.437 t. 9 f. 6, 7? | 1892 

 A. t, G. 0. Sars, Crust. Norway, v. 1 p. 218 t. 75 f. 1 [ 1893 A. t. (part.), A. DellaValle 

 in: F. Fl. Neapel, u 20 p. .595 t. 59 f. 5. 



