by Rev. T. R. R. Stebbing. ets 
1868. MM. g., A. Milne-Edwards, Arch. Mus. d’Hist. Nat. Paris, vol. 
iv, p. 84, pl. 20, figs. 8-11 (Rathbun). 
J914. M. brevis (Herbst), M. J. Rathbun, Pr. U.S. Mus. vol. xlvii, 
p. 83. 
1916. M. grandidierr, Tesch, Zool. Med. Mus. Leiden, vol. i, pp. 
150, 153, 166, pl. 6, figs. 3a, b. . 
The present specimen agrees so closely with the description given 
by A. Milne-Edwards. in 1867 for his species from Zanzibar that it 
must, I think, be conspecific. Miss Rathbun, however, in instituting 
M. sandakani, a new species from Borneo, makes J. grandidierti a 
synonym of J/. brevis (Herbst), relying, it seems, largely on the 
fact that the Borneo species has “three granulated tubercles in a 
longitudinal row on the branchial region.” It is true that such a 
series is not mentioned by Herbst, but his figure (pl. 60, fig. 4) 
appears definitely though rudely to indicate its presence. The 
Zanzibar specimen is expressly declared to be entirely smooth, thus 
agreeing with our own in being only microscopically punctate. There 
are other difficulties, as Herbst says that the movable finger has a 
strong tooth on the middle of the inner margin, though his figure does 
not show it, and_he neither mentions nor figures the broad tooth-like 
elevation with granulate margin on the middle of the thumb, which is — 
seen in our specimen and no doubt answers to the ‘large conical 
tooth ” described by Milne-Edwards. That author makes no allusion 
to Herbst’s species, but names de Haan’s M. dilatatus among the 
many from which he discriminates M. grandidierit. 
Between the first antero-lateral teeth the carapace from Durban 
measures 23 mm., but 25 mm. between the apices of the larger second 
teeth which overlap the first. The small third pair of teeth were 
invisible until the thick fringe of setee was removed. ‘To the rear not 
far from the margin occurs a small pimple on the right side only. 
The median length is 10 mm. in a straight line, without regard to the 
downward slope of the inter-orbital front and that towards the hind 
margin. The carapace agrees with Herbst’s description of MW. brevis 
in having on the front half on both sides (two transverse) fold-like 
elevations and depressions, but his further remark, that the middle 
of the carapace has considerable elevations, the hinder of which is 
granular, does not.apply. The lower margin of the orbit for some 
distance from the inter-orbital front is tuberculate and visible in 
dorsal aspect, but becomes smooth and disappears as it slopes towards 
the first antero-lateral tooth, which the eye in repose just outstrips, 
without reaching the large second tooth, | 
