MACRURA. 85 



Rostrum poorly developed. Orbits unarmed. 1st and 3rd segment of the 

 antennular peduncle equal. 2nd segment twice as long as each of the others. 

 Antennular scale not reaching to the end of the 1st segment. Antennal peduncle 

 one and one-fourth times as long as the antennular peduncle. Spine of antennal 

 scale as long as antennular peduncle. 



The 3rd legs have the ischiopodite unarmed. The posterior border of the mero- 

 podite is fringed with about 20 very delicate spines and ends distally in a strong 

 spine. The carpopodite has on its posterior external border 1 spine and about 

 5 hairs, and on its internal border about 15 long, fine spines. The propodite has 

 7 pairs of spines on its posterior border and is fringed with hairs anteriorly. The 

 dactylos is slightly biunguiculate. 



General distribution : Maldives, Ceylon. 



Alpheus spongiarum, Coutiere. 



Alpheus spongiarum, Coutiere, 'Fauna of Maid, and Lace.,' p. 895, 1905. 

 Locality : Cheval Paar (Station XL VIII.), 1 specimen. 



This species is very closely allied to A. paraculeipes, but differs in the form of the 

 3rd pair of legs. The meropodite is not so stout as in the latter species. Along the 

 posterior border of the meropodite there are 7 very long hairs with about 1 5 short 

 hairs between. The carpopodite has no spine on the posterior border and the 

 dactylos is not bifid. 



General distribution : -Maldives and Ceylon. 



Alpheus paralcyone, Coutiere. 



Alpheus paralcyone, Coutiere, 'Fauna of Maid, and Lace.,' p. 895, 1905. 



Locality: Off Mutwal Island (Station LXVII.), 2 specimens. 



Rostrum is well defined and slightly carinated behind. The 1st and 3rd segments 

 of the antennular peduncle are subequal, and the 2nd segment is one and a half 

 times as long as each of the others. Antennular scale very small, antennal peduncle 

 one and one-third times as long as the antennular peduncle. The spine of the 

 antennal scale reaches past the end of the antennular peduncle. The palm of the 

 large chela is massive, narrowing distally, and the digits are very short. 



In the 3rd pair of legs the ischiopodite is armed with a single spine, the meropodite 

 is large and ends distally at the posterior border in a large spine. The carpopodite 

 has about 4 spines on its posterior border, and the propodite has 8 pairs of spines. 

 The dactylos is bifid. 



General distribution : Maldives, Ceylon. 



Alpheus miersi, Coutiere. 



Alpheus miersi, Cuutiere, 'Fauna of Maid, and Lace.,' p. 903, 1905. 



Alpheus rapax, var. miersi, Coutiere, ' Bull. Soc. Entom. de France,' No. 7, p. 166, 1898. 



Localities : Pearl banks, Gulf of Manaar (Station III.), 3 specimens; Cheval Paar 



