456 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
(c) The spines on the walking-legs are more pronounced than in Alcock’s 
figure of C. wood-masont. 
(d) The armature of the wrist and hand is markedly acicular, giving an 
appearance very different from the tubercles figured by Alcock for C. wood- 
masoni; in the case, however, of the ovigerous female, specimen 218, the 
condition of the right cheliped makes a decided approach to Alcock’s figure 
just named. 
So far then the present specimens fall without doubt under C. spinipes in 
spite of (6) and (d) above, but they agree with C. wood-masoni in the 
denticulate character of the frontal margin. In this latter character they 
differ a good deal among themselves, but Alcock’s figure of C. wood-masont 
gives a very fair idea of the frontal condition in some of them. It appears 
doubtful whether Heller’s figure of C. spinipes is intended to convey any 
different impression. 
The following is the condition in each of the present specimens :— 
Number of Number of Enlarged denticles of inner. 
No. of Q C1 denticles on denticles on frontal lobes ; the numbers 
specimen. | ° eas left inner lobe | right inner lobe are from inner end. 
of front. of front. (Outermost denticles excluded.) 
mm. 2nd, 3rd, 4th, and 5th on each lobe 
219 3 3°25 23 23 (1st issmall on right and very 
{ small on left). 
5 hes ne 2nd, 3rd, and 4th on right. 
220 3 325 22 22 Ist, 2nd, and 38rd on left, 
2nd and 3rd on each. 
294, jo) 3°75 A+P45 6+P+5 (Denticles obsolescent on middle 
of each lobe.) 
215. | Qovig. 4:25 7 | 1 Ist, 2nd, and 3rd on each. 
221. 3 45 AN tat 18 None enlarged. 
917 ws 2nd and 38rd on right. 
Pall 2 5:0 16 16 } 2nd, 3rd, and 4th on left. 
218. | Qovig. 50 12 12 Ist on each. 
216. 3 5'0 11 11 Ist on each. 
3 Plane 2nd and 3rd on right. 
aes J Pao ao “8 1 and, drd, and 4th ‘on left. 
223 d 5 18 18 2nd and 8rd on each. 
Oy roi 5'5 13 138 Ist and 2nd on each. 
99K ee Ist, 2nd, 5th, and 7th on right. 
Rar = oe ° Ho All on left. | i 
226. 2 6:25 6 ff All. 
214. 3 70 8 11 All, particularly 1st on each. 
The outermost tooth of the inner frontal lobe, and in some cases more than 
one tooth in this position, is also enlarged. There is a similarly enlarged 
tooth on the small outer frontal lobe to the inner side of the much larger 
terminal tooth. 
