ien63 | 
No. III.—LAND AND FRESHWATER DECAPODA. 
By L. A. BorravaiLe, W_A., Lecturer in Natural Sciences at 
Selwyn College, Cambridge. 
(Communicated by J. Svantey Garpiner, M.4A., F.L.S.) 
Read 21st February, 1907. 
THE collection contains 30 species, belonging to 11 genera. None of these, however, 
are new to science, and all have been previously reported from some part of the Indian 
Ocean. There is of course nothing surprising in this fact, but it is of some importance 
that it should be established, especially in view of the care with which the collecting 
appears to have been done. 
All the species in the present list were found in Minikoi or the Maldives by 
Mr. Gardiner’s former expedition or by the Agassiz expedition, with the exception of 
those belonging to the genera Caradina, Palemon, Birgus, Deckenia, Sesarma, and 
Varuna. Onthe other hand, Wetasesarma rousseauxi, H. M.-Edw., found both in Minikoi 
and the Maldives, and Leander debilis (Dana) and ZL. gardineri, Borr., found in the 
Maldives, are not represented in the present collection. Time will probably disclose 
Metasesarma rousseauxi in the Seychelles, but the other cases are more doubtful. Thus 
the fauna of the present area is distinctly richer than that of the Maldives and 
Laccadives, but does not otherwise differ from it greatly. 
From the geographical point of view little information can be drawn from such a 
collection as the present until more is known as to the means of distribution of land, and 
especially of freshwater, Decapoda. It is particularly unfortunate that we know so 
little as to the development of most of the species, whether it be direct or larval, and 
as to their power, at all times of life, of living in salt water. 
DECAPODA REPTANTIA, BRACHYURA *. 
Family Potamonide. 
Subfamily Deckeniine. 
Genus DECKENLIA, Hlgdf., 1868. 
1. Deckenia alluaudi, A. M.-Edw. & Bouv., 1893. 
A. Milne-Edwards and E. L. Bouvier, Ann. Sei. Nat. 7, xv. p. 335, pl. vill. (1893). 
This very interesting species is peculiar to the Seychelles. Its only congeners are 
found in East Africa. It was obtained on Morne Seychellois, Mahé, 2200 feet, and 
Cascade River, Mahé, 800 feet. 
* See ‘Fauna of the Maldives and Laccadives,’ ed. J. Stanley Gardiner, i. iv. pp. 42+ ff. 
