Melita 425 



detiiied, fiuger strongly curved, closing against inner surface of 6*^'^ Joint. 

 Peraeopods 1 and 2 slender. Peraeopods 3 — 5 stouter, 2^ Joint oval, pretty 

 well expanded. Uropods 1 — 3 as usual in the genus. Telson with lobes 

 about reaching end of peduncle of nropod 3, L. 10 — 11 mm. 



Adriatic (Lesina). 



7. M. palmata (Mont.) 1804 Cancer palmatus, Montagu in: Tr. Liun. Sor. 

 London, v.l p. 69 t. 6 f . 4 { 1812 Astacus x>-> Pennant, Brit. ZooL, ed. 5 r. 4 ]j. .^5 

 1813/14 Melita palmata, M. palmeta, Leach in: Edinb. Enc, v.7 j). 403, 432 ] 187b 

 M.pahnata, A.Eoeck. Skand. Arkt. Amphip., v.2 p. 387 t. 24 f. 4 | 1878,l/.^>., Zaddach 

 in: Sehr. Ges. Königsb., v.l9 Abh. p. 32 f. 4 | 188'J M. p., A. M. Norman in: Ami. iiat. 

 Hist., ser. 6 V.4 p. 132 | 1893 M. p. (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 713 

 t. 1 f. 6; t. 23 f. 24—40 | 1894 M. p., G. O. Sars, Crust. Norvvay, i: 1 |). 508 t. 179 | 1818 

 Gammarus palmatus, Lamarck, Hist. An. s. Vert., v. 5 p. 181 | 1830 G. diigesii, H. Miliie 

 Edwards in: Ann. Sei. nat., i'. 20 p. 368 | 1857 G. huiequimann^. Hate in: .Ann. nat. 

 Hist., ser. 2 v. 19 p. 145. 



Pleon Segment 4 produced dorsally to a compressed tooth, segment 5 

 • to 2 small contiguous denticles, each with a bristle at the base. Head, a 

 sraall rounded projection in the rosttal position, post-antennal corners 

 separated by a small incision from the lateral corners. Side-plate (i in o (not 

 in d, as Boeck asserted) having the front lobe produced below to a spiral process. 

 Pleon segment 3, postero-lateral corners slightly produced, acute. Eyes very 

 small, roundisb, dark brownish. Antenna 1 raore than ^/o as long as body, 

 2*^ Joint rather longer than P*, ?t^ about half 2*^ or less, flagellum longer 

 than peduncle, 20-jointed, accessory flagellum 2-iointed. Antenna 2 much 

 shorter, ultiraate and penultimate joints of peduucle subequal, flagellum short, 

 sometimes with 10 joints. Maxillipeds, 3<^ Joint of palp distally widened, 

 finger with setules on inner margin. Gnathopod 1 very small, 6* Joint 

 much shorter than 5^^, widening distally, palm transverse; (Sars: flnger in 

 Q well defined, in ä obtuse and imraovable; but Zaddach and others: 6*^ 

 Joint in d on its front border deeply emarginate and so oblicjuely that the 

 emargination is larger on the inner than on the outer side, whereby aiises 

 an Upper and an under proc(jss, the tinger being placed in the emargination 

 on the outer surface, and moving so obliquely that in repose it rests on the 

 inner side of tlie under process, its place of Insertion being protected by a 

 chitinous process on each side). The finger ends in an acute hook. Gnatho- 

 pod 2 large in 9 , 5**^ Joint expanded distally to a broad setiferous lobe, 

 6*1^ broad, ovately oblong, palm rather oblique, with a few spines at the 

 obtuse angle; in d very large, ö*'^ Joint short, cup-shaped, 6*^ much expanded, 

 widest at palm which is somewhat variable, sometimes where it meets bind 

 margin much projecting aud rounded off (Sars), at others, slightly oblique 

 and angular, with a strong gi'oup of setae on the adjoining surface. finger 

 curved, acute, folding down on to the inner concave surface of 6*^ Joint. 

 Peraeopods 3 — 5 much stouter than peraeopods 1 and 2, 2'^ Joint broadly oval, 

 very slightly serrate, peraeopods 4 and 5 much longer than 3*1, terminal 

 joints overturned backward. Finger in maxillipeds and all the limbs ending in 

 a nail, finger short in peraeopods 1 — 5. Uropods 1 — 3 of the usual character. 

 Telson about reaching end of peduncle of nropod 3, with lobes rather narrow, 

 widely divergent, each carrying 4 spinules on truncate apex, and 3 strenger 

 spines on projection of inner margin (Sars); divided to the base, each lobe 

 very acute, with slight indent on the outer margin (Della Valle). Colour 

 pale brownish yellow. L. 8 — 16 mm. 



North-Atlantic with the adjoining seas (Europa: Great Britain, W'est-Norway, 

 Baltic etc.; Azores). 



