688 L. A. BORRADAILE. 
gaping. The species is allied to H. calvarius but differs in that: (i) the horns are more 
slender and diverge more strongly, curving, as well as slanting, outwards, (ii) there is no 
trace of a knob on the gastric mound, which is also more prominent, (iil) there is no 
epibranchial spinule or intestinal spine, (iv) the carapace is narrower, and (v) the palm is 
rather more swollen. It was dredged in 30 fathoms in Suvadiva Atoll. 
14. Halimus espinosus, n. sp. (Pl. XLVII. fig. 4). 
The group of forms akin to H. diacanthus (including var. elongata Ortm., 1893, H. 
subinermis Zehnter, 1894, H. convecus Miers, 1884, and H. calvarius Alc., 1895) are in all 
likelihood no more than varieties of one variable species. The collection contains a specimen 
of another such form, which I describe here. The following characters, taken together, separate 
it from its allies mentioned above: (1) carapace narrow (10:6); (41) gastric region swollen, 
with traces of the knob; (iii) horns rather less than half the length of the carapace, straight, 
not very divergent; (iv) a spinule on each branchial region and a low knob in place of the 
intestinal spine; (v) the outer angle of the basal antennal joint not strongly marked. The 
specimens, which are both males, were dredged in Haddumati Atoll in 35 and 39 fathoms. 
15. Halimus agassizi Rathb., 1902. 
Halimus agassizii, Rathbun, Bull. Mus. Harvard, xxxrx. 5, p. 138, fig. 6. 
The females of this species have very slender chelipeds with long narrow palms and 
short fingers, which gape very slightly. Miss Rathbun’s only specimen was taken in the 
same locality as ours, Nilandu Atoll, and in practically the same depth, 24 fathoms. 
Genus Phalangipus Latr., 1825. 
Miss Rathbun (Proc. Biol. Soc. Washington, X1. p. 159, 1897) has shown that this name 
must be substituted for Hgeria Leach, 1815, which is preoccupied. 
16. Phalangipus arachnoides Latr., 1825. Alcock, 1. p. 223. 
Dredged in Mulaku, South Nilandu, and Felidu Atolls, in 25—36 fathoms. 
Genus Tylocarcinus Miers, 1879. 
17. Tylocarcinus styx (Hbst.), 1803. Alcock, 1. p. 235. 
Taken on the reef in Male, Fadifolu, and Goifurfehendu Atolls. 
Subfamily Maiinae. Genus Schizophrys White, 1848. 
18. Schizophrys aspera (A. M.-Edw.), 1834. Alcock, 1. p. 243. 
Taken on the reef in Male and Fadifolu Atolls, and dredged in 34 fathoms in Felidu 
and 20 fathoms in Suvadiva Atoll. 
Genus Cyclax Dana, 1852. 
19. Cyclax (Cyclomaia) suborbicularis (Stimps.), 1857. Alcock, I. p. 245. 
Taken on the reef at Hulule, Male Atoll. 
