1922.] S. Kemp : Notes on Crustacea Decapoda. 185 



is scarcely more than a quarter the length of the chela and the 

 fingers are longer than the palm. In specimens of P. diversipes 

 in which the caipus is very short, the palm is always longer than 

 the fingers. 



P. potina was described by Nobili from three specimens ob- 

 tained in the Persian Gulf, l6°35' N., 54°26' E., on floating brown 

 seaweed. 



Periclimenes (Ancylocaris) korni (L,o Bianco). 



1903. Anchistia kornii, I.o Bianco, Mitt. zool. Stat. Neapel XVI, p. 



250, pi. vii, fig. 13. 

 ? 1910. Periclimenes korni, Kemp. Journ. Marine Biol. Assoc. VIII, p. 

 411. 



Near Capri, Mediterrannean, about 600 fathoms. ? Bay of 

 Biscay, 412 fathoms. 



Periclimenes (Ancylocaris) brevicarpalis (Schenkel). 

 (Plate VI, fig. 8.) 



? 1880. Nicht bestimmte Palaemonide, Richters, in Mobius' Meeres/auna 



Mauritius, pi. xviii, fig 10. 

 ? 1893. Palaemon sp., Saville-Kent, Barrier Reef of Australia, p. 145, 



col. pi. ii. 

 ? 1894. Palaemonella amboinensis, Zehntner, Rev. Suisse Zool. II, p. 

 206, pi. ix, figs. 27, 27a. 

 1898. Bithynis sp., Couticre, Bull. Mus. Paris IV, p. 19S. 

 1902. Ancylocaris brevicarpalis, Schenkel, Verh. naturf. Ges. Basel 

 XIII, p. 563, pi. xiii, figs. 2\a-m. 



1904. Palaemonella aberrans, Nobili, Bull. Mus. Paris X, p. 233. 



1905. Harpilius latirostris, Lenz, Abhandl. Senck. naturf. Ges. 



XXVII, p. 380, pi. xlvii, figs. 14, i^a-c. 



1906. Ancylocaris aberrans, Nobili, Bull. sci. France Belgique XL, 



p. 52. pi. iv, figs. 9, ga, b. 

 1906. Ancylocaris aberrans, Nobili, Ann. sci. nat., Zool. (9) IV, p. 



64. 

 1914. Periclimenes hermitensis, Rathbun, Proc. Zool. Soc. London, p. 



"55. pl- ■- fi g s - 1-1- 



1916. Ancylocaris aberrans, Kemp, Rec. Ind. Mus. XII, p. 389. 



1917. Ancyclocaris aberrans, latirostris, hermitensis, brevicarpalis, 



Borradaile. Trans. Linn. Soc. (2) Zool. XVII, pp. 355, 356. 



Four specific names have been applied to brilliantly coloured 

 Pontoniine prawns which are found living in association with 

 giant anemones belonging to the genus Discosoma, but it appears 

 to me improbable that more than one such species is at present 

 known. 



Borjadaile, who has summarized the characters by which the 

 four described forms are distinguished, remarks on the difficulty of 

 separating them and suggests that some will eventually have to 

 be united. This is the more probable since the species, being 

 assigned to four different genera, were originally described without 

 any thought of comparison with one another. 



A series of specimens from Indian waters shows that the 

 differential characters employed by Borradaile do not possess 

 specific value. Though the normal variation is not great, it is 



