640 Ampithoe 



Body long, compressed, but not always slender. Head, lateral lobes 

 blunt. Side-plate 1 bluntly produced somewhat forward, 2*^ — 5*^^ rotuudo- 

 •quadrate below. Pleon segment 3, postero-lateral corners obtusely quadrate. 

 Eyes small, rounded oval, dark red. Antenna 1, 1^* and 2'^ joints subequal, 

 3^ less than half as long as 2^; flagellum slender in 9 , sometimes twice as long as 

 peduncle, but in d sometimes not longer than peduncle, 23 — 35-jointed. 

 Antenna 2 stout, in 9 decidedly shorter than antenna 1, but less so in cS; 

 ultimate Joint of peduncle as long as penultimate; flagellum about half as long as 

 peduncle in 9, less than that in ö, 9 — 15-jointed. Lower lip, outer part 

 of bifid lobe distally rounded. Mandible, 3^ Joint of palp longer than 2*^, 

 ■widening distally and densely beset with setae on apex and distal part of 

 inner margin. Gnathopod 1, 2^ Joint lobed at apex of channelled fi'ont, 

 5*^ a little shorter than 6*^ 6*^ oblong oval, palm oblique, finger rather 

 longer than palm, seiTulate. Gnathopod 2 in d', 5*^ Joint much shorter 

 than the large 6*^, which has the palm more or less excavate, defined by 

 a small but distinct tooth, within which the curved finger impinges. Gnatho- 

 pod 2 in 9 like gnathopod 1, but with wider 5**^ and 6**^ joints. Peraeo- 

 pods 1 and 2, 2^ Joint naiTowly oval, 4*^ distally widened but not apically 

 lobed. Peraeopod 3, 2*^ Joint broader than long. Peraeopods 4 and 5, 2^ Joint 

 oblong oval, not much expanded. Peraeopods 3 — 6, 6**^ Joint not narrowing 

 distally, with tuft of setae at back of apex ; finger up-curved. Uropods 1 and 2 

 spinöse, in uropod 1 peduncle longer than rami. Uropod 3, peduncle twice 

 as long as rami, with transverse row of spines on apical margin; outer 

 ramus with 2 strong hooks, inner rather narrower with 2 lateral spines, 



1 apical, and several setae, Telson as broad as long, apex rounded, between 



2 little tubercles, within which are 3 setules on either side. Colour rather 

 variable, from red to green, with dark stellate markings, often with white 

 Spots along middle of back. It forms a dwelling by knitting together various 

 fragments, the cement-fibres apparently supplied from the glandcells of 

 peraeopods 1 and 2. L. reaching 20 mm. 



North-Atlantic with adjoining seas (Europe). Among algae between tide-marks, 

 and at small depths. 



17. A. inda (M.-E.) 1830 Ämphithoe i., H. Milne Edwards in: Ann. Sei. nat., 

 V. 20 p. 376 I 1840 Amphitoe indica, H. Milne Edwards, Hist. nat. Crust., v.3 p.31 | 1888 

 Ämphithoe i., G. M. Giles in: J. Asiat. Soc. Bengal, v. 57 p. 240 t. 10 f. 1—7 | ?1852 

 A. rubella, J. D. Dana in: P. Amer. Ac, v. 2 p. 215 \ 1853 & 55 A. r., J. D. Dana 

 in: U. S. expl. Exp., ». 13ii p. 936; t. 64 f. 1 a— d | 1862 A. indica -{-A. r., Bäte, Cat. 

 Amphip. Brit. Mus., p.240 t.42 f. 3; p.246 t.42 f. 8 [ 1893 A. rubricata (part.)?, A. inda, 

 A. Della Valle in: F. Fl. Neapel, v. 20 p. 459, 463. 



Body rather stout. Side-plates 1 — 5 broad. Pleon segment 3, postero- 

 lateral corners subquadrate. Antennae 1 and 2 equal, or antenna 1 rather 

 the longer. Antenna 1 more than \'g as long as body; 2^ Joint nearly as 

 long as 1^*, 3^ veiy small; flagellum with 13 or 14 short joints. Antenna 2, 

 ultimate Joint of peduncle a little longer than penultimate, flagellum with 

 9 — 11 Short joints. Mandibular palp small. Gnathopod 1 small, 5*^ Joint 

 shorter than ,6*^, 6*^ oblong, narrow, nan-ower at apex; finger longer than 

 palm. Gnathopod 2, 6*^ Joint stout, broad, subrectangular ; palm transverse, 

 little excavate and unevenly so, defining angle prominent and acute but 

 not produced; finger moderately large and somewhat serrate. Peraeopods 1 

 and 2, 2* Joint not much widened. Peraeopod 3, 2^ Joint broad. Peraeo- 

 pods 4 and 5 much longer, with 2^ Joint somewhat less broad. Peraeo- 



