436 MARINE BIOLOGY OF THE SUDANESE RED SEA. 
on the wrist only the tips of the spines are granular, more particularly in 
the longer ones ; and on the arm there is a transition as in the hand, but in 
the reverse direction, i.e., a trace at the tip of the two distal ones, in the 
next one there are in addition one to three granules about the middle of its 
length, in the next the outer half or more is granular, and in the most 
proximal member of the series the granules extend almost to the base. 
(d) In & 44 the lateral epibranchiai spine appears to curve a little 
forwards, owing to the convexity of its posterior border, while in ? 45 and 
3 46 it points in a straight line obliquely backward. 
(e) In g 44 the lateral epibranchial spines are relatively shorter than in 
245. (In 6 46 they are damaged.) 
(f) In g 44 the lateral epibranchial spine is simple, Pini in ? 45 and 
& 46 it bears on each side near its base a well-marked secondary spine (not 
to be confused with the quite separate spine to its inner side). 
(g) The number of large spines on the outer margin of the hand differs, 
in ¢ 44 there are six while in 2? 45 and ¢ 46 there are eight. 
Miers (1879, pp. 22-4) describes several varieties of this species. Speci- 
mens 45 and 46 appear to come close to White’s type-specimen from 
‘“‘Hastern Seas,” described by Miers, while specimen 44 closely resembles 
Ceylon examples examined by me (Joc. cit.) and comes close to var. planifrons 
(Ceylon) and var. granulosus (Phillipine Islands and Corregidor), both of 
Miers. 
Although in my Ceylon examples the resemblance is to specimen 44 of the 
present collection, the tubercles of the carapace are sharper than in it, and 
the orbital border is more as in specimens 45 and 46. 
Perhaps the most important of the contrasted characters in the above forms 
are the number of spines on the outer border of the hand and the condition 
of the lateral epibranchial spines. 
L. hoplonotus has not hitherto been recorded from the Red Sea. 
18. LamBrus (RHINOLAMBRUS) PELAGICUS, [ttippell, 1830. See Alcock, 
1895, p. 267. 
Lambrus (Rhinolambrus) pelagicus, Alcock, loc. cit. 
Lambrus (Rhinolambrus) pelagicus, Nobili, 1906, p. 184. 
Lambrus (Rhinolambrus) pelagicus, Klunzinger, 1906, p. 47 
Lambrus (Rhinolambrus) pelagicus, Laurie, 1906, p. 389. 
Locality. Station II., 1 g, small [47]. 
Remarks. ©.). 7°5 mm., C.b. 75 mm., Ch.l. 19°5 mm., Ch.l.=(C.1.=2°6. 
The cheliped length of this young ¢ agrees with that of a young ? of 
similar size from Ceylon (Laurie, loc. cit.). 
