No. 5.— Crabs from the Maldive Islands. 
By Mary J. RatHepun. 
Tuis collection, aside from a few land crabs and swimming crabs taken 
at the surface, was obtained in the lagoons of the Maldive atolls in 
depths of from sixteen to thirty fathoms by the expedition of Alexander 
Agassiz in 1901-1902. The majority come from Nallandu, Miladumma- 
dulu Atoll. Of a total of twenty-eight species, six species seem to 
be new. Major Alcock has described nearly all the known forms in his 
‘‘ Materials for a Carcinological Fauna of India ;” therefore the ref- 
erences to synonymy are not repeated here except where different 
conclusions have been reached as to the identity of species. 
It will be noted that our list furnishes several additions to the Land 
Crustaceans, Portunide, and Xanthide given by Borradaile in Gar- 
diner’s Fauna and Geography of the Maldive and Laccadive Archi- 
pelagoes, I. 1901-1902. 
The drawings were made by Miss A. A. McKnew. 
OCYPODID&. 
Ocypode ceratophthalma (Patuas). 
Ocypoda ceratophthalma Atcock, Journ. Asiatic Soc. Bengal, LXIX. 345, 1900, and 
synonymy. 
Ocypode ceratophthalma BoRRADAILE, Fauna Maldive Arch., I. part I. pp. 67 and 
96, 1901. 
Male, December 23; 2 young. Kolumadulu, December 30; 9 young. 
Uca tetragonon (Hrrsst). 
Gelasimus tetragonum Aucock, Journ. Asiatic Soc. Bengal, LXIX. 357, 1900, and 
synonymy. 
Male, December 23 ; 5 males. 
This species is subject to considerable variation in the following directions : — 
The front may be an oblong lobe, as figured by Milne Edwards,! or may be 
1 Ann. Sci. Nat. (8), XVIII. pl. II. fig. 9, 1852. 
VOL. XXXIX. — NO. 5 
