Tmetonyx 75 



2. T. miersi (Stebb.) 1888 Hippomedon m., T. Stebbing in: Rep. Voy. Cballenger, 

 ».29 1x631 t. 10 I 1893 Anotiyx miersii, A. Della Valle in: F. Fl. Neapel, v. 20 p. 813. 



Head, lateral angies roimded. Side-plate 1 narrowed below. Pleon 

 Segment 3, postero-lateral angies roimded, almost quadrate. Eyes doubtful. 

 Antenna 1, flagellum witli 1 1 joiuts, 1^* very large, accessory flagellum 4-jointed. 

 Antenna 2 in d, ultimate Joint of peduncle longer than penultimate, flag'ellum 

 38-jointed. Epistome? Gnathopod 1, 3^ Joint not longer than 4*^, 6**^ rather 

 longer than 5*^ Gnathopod 2, 6**^ Joint not half as long as 5*^ apically a little 

 produced. Branchial vesicles, with approximation to Anonyx (p. 53), showing 

 some irregulär folds. üropod 3, inner ramus shorter than basal Joint of outer, 

 each carrying a fringe of very long plumose setae. Telson much longer than 

 broad, cleft about */- of the length, with 2 pairs of marginal spinules and 

 1 pair in the broad emarginate apices. L. about 12 mm. 



Bass Strait (East Moncoeur Island). Deptb 68 m. 



3. T. acutus (0. Sars) 1891 Hoplonyx a., G. 0. Sars, Crust. Norvvay, v. 1 p. 95 

 t. 33 f. 2 I 1893 Anonyx cicada (part.), A. Della Valle in: F. Fl. Neapel, v.2Ö p. 833. 



Head, lateral angies much and very acutely produced. Side-plate 1 

 neither narrowed nor expanded below, 4*^ much expanded into a narrow obtuse 

 lobe. Pleon segment 3, postero-lateral angies scarcely produced, quadrate. 

 Eyes as in T. similis (p. 76). Gnathopod 1, palm straight. Gnathopod 2, 6"^ Joint 

 fully half as long as 5*^ palm obliquely truncate, finger stronger than 

 usual. üropod 3, rami nearly equal in length. Telson with 2 pairs of 

 dorsal spinules. Eggs in pouch orange-coloured. L. 9 13 mm. — Other 

 points in practical agreement with the account given of T. similis (p. 76). 



North-Atlantic (West-Norway). 



4. T. albidus (0. Sars) 1891 Hoplonyx a., G. 0. Sars, Crust. Norway, v.l p.96 

 t.33 f. 3 I 1893 Anonyx a., A. Della Valle in: F. Fl. Neapel, ^20 p. 826. 



Head, lateral angies nearly quadrate. Side-plate 1 narrowed below, 

 4*^ expanded into a short broad quadrate lobe. Pleon segment 3, postero- 

 lateral angies not at all produced, quadrate, 4*^ deeply depressed dorsally. 

 Eyes large, scarcely prolonged backward as in other species, Visual elements 

 indistinct, pigment light red. Antenna 1 in 9 , flagellum 15-jointed, accessoiy 

 flagellum 8-jointed. Antenna 2 considerably longer than antenna 1, flagellum 

 28-joint.ed. Epistome much projecting, obtusely angled. Gnathopod 1, 6* Joint 

 subequal to 5*^ palm indistinctly deflned below. Gnathopod 2, 6*'^ Joint 

 more than half leng-th of b^\ narrow. Peraeopods 3 — 5 shorter than usual, 

 2^ Joint very large. üropod 3, rami rather broad, inner shorter than outer. 

 Telson not twice as long as broad, with 2 pairs of dorsal spinules. Colour 

 whitish, not tinged with red, eggs in pouch bright red. L. 9 12 mm. 



Arctic Ocean, North-Atlantic and North-Sea (North- and West-Norway). Depth 

 150—282 m. 



5. -T. eicadoides (Stebb.) 1888 Anonyx c, T. Stebbing in: Rep. Voy. Challenger, 

 V. 29 p. 612 t. 4, 5 I 1891 A. c, Hoplonyx (part.), G. 0. Sars, Crust. Norway, v. 1 p. 92 j 

 1893 Ichnopus sp.? + A. nugax (part.)?, A. Della Valle in: F. Fl. Neapel, u20 p.835. 



Head, lateral angies a little produced, rounded. Side-plate 1 expanded 

 below, 4*^1 expanded into a rather narrow rounded lobe. Pleon segment 3, 

 postero-lateral angies much produced, acutely upturned. Character of eyes 

 uncertain. Antenna 1 in o , flagellum with 20 joints, 1^* not very large, 

 accessory flagellum with 9 joiuts, 1^* not very long. Antenna 2 in 9 , ultimate 

 and penultimate joints of peduncle subequal, flagellum 30-jointed. Antenna 2 



