AALS MARINE BIOLOGY OF THE SUDANSSE RED SEA. 
Number of 
lobes of ant.-lat.| Condition of | Armature 
No. of ae Cl bord. ©. which | tubercle or spine |of posterior} Larger 
specimen. " ca end in procurvedjon anterior margin} margin of | chela, 
spine-like of arm, arm. 
points. 
12 e: 2 33d mm 3 Spine. Spiniform.| Left. 
128. fe) 37 mm 3 ‘ x Right. 
129. fe) 37 mm 3 - ie Lett. 
130. 2 40 mm 3 + ; Right. 
181. ri 40 mm 3 » Fi Right. 
132. rei 4°55 mm 3 y 3 Right. 
Pe HISRE 3 45 mm 3 K ts Left. 
134. 3 50 mm 3 - ie Right. 
135. 2 50 mm 3 + i Left. 
136. Q 50 mm 3 » “A Left. 
eos Q 60 mm 3 4 Right. 
138. 3 60 mm 3 % Right. 
139. g 60 mm 3 a a Lett. 
140. Govig. | 60 mm 3 wy Granular, | Right. 
141. Povig. | 60 mm 2 % eS Right. 
149. rei 65 mm 3 ss Spiniform. | Lett. 
143. 2 65 mm 3 3 Granular. | Right. 
144. 2 65 mm, 2 * at Left. 
145. rot 67 mm. 3 ee uy Right. 
146. @ 70 mm. 3 Ms a Left. 
147. of 72 mm. 2 Me Left. 
148. 3 7 mm. 3 4s “ Left. 
149. 3 75 mm. 2 0 ss Left. 
150. 0) ao a a 10 ET 2 6 7 Right. 
eo toile © 80 mm. 3 5 i Left. 
152. Povig. | 8O mm. 2 rp 3 Left. 
158. 3 80 mm. 2 - + Right. 
154. 2 80 mm 2 5 An Left. 
155. Q 80 mn 2 + Ys Left. 
156. 3 90 mm 2 ie Pees Right. 
157. 3 90 mm. 2 Small tubercle. i Left. 
158. 3 90 mm. 3 Spine. ' Right. 
159. 2 9:0 mm. i Tubercle, Left. 
160. 3 95 mm. 2 Pointed tubercle. ") Right. 
161. 6 95 mm. 0 Small tubercle. Gs Right. 
162. 3 10:0 mm. 1 Tubercle. . Right. 
163. 3 11:0 mm. 0 Small tubercle. ‘3 Right. 
164, re 11:0 mm. 1 Small tubercle. _ Left. 
1685, 3S 115 mm 0 Tubercle. i Left. 
166. io) 12;0 mm. 0 Tubercle. Left. 
It will be noticed that, as a rule, crabs with C.l. from 3°5 to 6°5 mm. have 
the last three of the antero-lateral lobes spiniform, those with C.l. 7 to 
9 mm. have the last two lobes spiniform, those with C.l. 9°5 to 11 mm. tend 
to have only the last lobe spiniform, and that in those with (.l. above 
11 mm. there is an absence of the spiniform condition in all the lobes. 
It will be further noted that the above is only an average relation and that . 
variability is not the same in crabs of all sizes. Thus, where ©.1. is 3°5 to 
