WALKER—AMPHIPODA GAMMARIDEA, 327 
Genus AMARYLLIS, Haswell, 1880. 
1. Amaryllis macrophthalma, Hasw. 
Il. Wasin, 7 fms. and 10 fms. (mud). Length of female 9 mm. 
Genus CYPHOCARIS, Boeck, 1871. 
2. Cyphocaris alécei, Chevreux, 1905. 
? Cyphocaris challengeri, Stebbing. 
I. N.W. of Desroches Atoll: Plankton, kk, 300 fms., one 3 mm.; xv, 200 fms, many, 
15 mm. 
M. Chevreux, in comparing his species with C. challengeri, lays stress on the 
absence in the latter of the hood over the head, formed by the projecting 1st segment, 
and the presence of teeth on the upper margin of the long process, directed backward, 
of the 2nd joint of the 3rd pereeopods. As regards@he former, Chevreux is correct in 
saying that the young have the hood (which appears to be wanting in C. challengeri), 
but the teeth on the process are present in the small specimen though not in the large. 
It is therefore an open question whether these two species are identical or net. 
Genus LYSIANASSA, H. M.-Edwards, 1830. 
3. Lysianassa ceratina (A. O, Walker). 
1887. Lysianassa longicornis, Chevreux, Bull. Soc. Zool. de France, p. 294. 
1889. Lysianax ceratinus, A. O. Walker, Proc. Biol. Sec. Liverpool, vol. iii. p. 200, pl. 10. 
1893. Lysianax longicornis, Chevr. & Bouvier, Ann. d. Sci. Nat. p. 111. 
1893. Lysianaz longicornis, Della Valle, Fauna &c, Golf. Neapel, Gammarini, p. 790 (part.). 
1893. Lysianazx bispinosus, Della Valle, Fauna &c. Golf. Neapel, Gammarini, p. 792. 
1895. Lysianax longicornis, A. O. Walker, Trans. Biol. Soc. Liverpool, vol. ix. p. 291. 
1896. Lysianax longicornis, A. O. Walker, Rep. Brit. Assoc. p. 438. 
1896. Lysianazx longicornis, A. O. Walker & Hornelli, Report on Schizopoda &c. of the Channel 
Islands, Journal of Marine Zoology, vol. ii. p. 52. 
1897. Lysianax ceratinus, A. O. Walker, Trans. Biol. Soc. Liverpool, vol. xi. pp. 166, 171. 
1900. Lysianaz ceratinus, Chevreux, Résult. Scient. Campagnes de VHirondelle, p. 16, pl. 5. 
fig. 1. 
1900. Lysianax ceratinus, A. M. Norman, Aun. & Mag. N. H. (7) vol. v. p. 143. 
1906. Lysianax ceratinus, A. M. Norman & T. Scott, Crust. of Devon and Cornwall, p. 56. 
1906. Lysianassa longicornis, T. R. R. Stebbing, Das Tierreich, Amphipoda Gammaridea, p. 39 
(part.). 
II. Wasin, Brit. E. Africa; 10 fms. mud; 3 2, 2 young. Length 7°5 mm. 
III. Suakim Harbour &c., 3 or 4. 
The above species, which I united with L. dongicornis, Lucas, m Ann. & Mag. Nat. 
Hist., Feb. 1892, was separated again by Chevreux, who was better acquainted than | 
with the true Z. Zongicornis, in 1900. In addition to the points of difference given by 
this author, I may mention that, according to Mr. Stebbing (1906, /. c.), in L. longicornis 
the eyes and flagella of the antenne are red and the telson apically rounded, while in 
i. ceratina the eyes are always dark brown or black, the flageila almost colourless, and 
