444 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
The carapace proportions apparently remain much the same during: 
growth. Thus C.b. + C.l. is about 1:5 in both ? 76 (C.l. 6 mm.) and 
2730) (C19 timmae)e 
The front does not present a fissure in any of the specimens. 
I j 
Genus Zostmus, Leach, 1818. 
(Original orthography Zosimus, not Zozymus.) 
32. Zostmus ANEUS (Linneus, 1764). See Alcock, 1898, p. 104. 
Zozymus eneus, Nobili, 1906, p. 235. 
Zozymus eneus, Stimpson, 1907, p. 42. 
Locality. Station VII. C,1 ¢ [81]. 
Remarks. C.l. 28 mm. 
Genus XanrHo, Leach, 1815. 
33. NANTHO DISTINGUENDUS, de Haan, 1835. See Aleock, 1898, p. 113. 
Xantho distinguendus, Nobili, 1906, p. 239. 
Xantho distinguendus, Laurie, 1906, p. 401. 
Localities. Station I. H,1 3 [82], 2 2 [83, 85 ovig.] ; a bottle labelled 
“Trials 1” 1 2 ovig. [84]. 
iemarks:) 4 S270 1 a l-Topmme >) 9 Sa. Cle 7 mimes 127 64onCnlee(co emma 
@ 85, C.l. 10 mm. 
In specimens 82, 84, and 85 the right, and in specimen 83 the left, chela 
is the larger. 
34, XANTHO HYDROPHILUS (Herbst, 1790). (Plate 48. fig. 1.) See Alcock, 
1898, p. 118. 
Xantho (Leptodius) exaratus, Alcock, loc. cit. 
Leptodius exaratus, Nobili, 1906, p. 240. 
Leptodius exaratus, Nobili, 1907, p. 121. 
Xantho (Leptodius) exaratus, Laurie, 1906, p. 402. 
Chlorodius evaratus, Stimpson, 1907, p. 52. 
Leptodius exaratus, var., Rathbun, 1911, p. 215. 
Xantho hydrophilus, Stebbing, 1910, p. 297. 
Localities. Station V. D, 2 9 [86, 87 ovig.]; Station VII. E,1 ¢ [88]. 
Remarks: 6 88, C1. (mm.5 9587 ovig..,C.1. dimm.)5 9286, C1. 5 mme 
Under a lens the carapace, chelipeds, and walking-legs are seen in all 
three specimens to be covered with granules which are obsolescent in some 
places but well developed in others: thus they are obsolescent on the 
posterior portions of the dorsal surface of the carapace, but well seen on the 
anterior and antero-lateral portions, the transverse edges of the areolx 
standing out conspicuously; they form a beaded row along the margin of 
