32 



fifth segments have the transverse furrow interrupted in the 

 centre by a very low, discontinuous carina. On the 

 sixth segment two median tubercles precede the furrow. 

 The second to the sixth segments have their sides 

 produced to a tooth, though it is far smaller than \n Palmurus 

 V7ilgarisy as are also the denticles to the rear of it. The 

 postero-lateral angle of the first pleon segment rests on a 

 slight smooth depression of the antero-lateral margin of the 

 second segment, the corresponding part in P.vulgaris being 

 not smooth but dentate. 



The eyes are dark, the stalk grooved below the facetted 

 portion, but without the widening towards the base, which is 

 conspicuous in P.vulgaris. Both pairs of antennae appear to 

 agree closely with those of that species. 



The first pair of trunk-limbs are slightly shorter and only 

 moderately stouter than the others ; the third joint has two 

 tubercles on its inner margin, the fourth joint or arm has on 

 the inner margin 5 teeth, of which the subapical one is rather 

 large ; its outer and lateral keels are smooth, not acute, but 

 each ends in a sharp tooth ; the fifth joint has a smooth outer 

 margin, produced to a rounded apex ; the sixth joint has a 

 sharp subapical tooth on the inner margin ; the finger, which 

 is not much shorter than the sixth joint, is longitudinally 

 grooved, and carries several tufts ot short setae. The 

 following pairs of limbs are slender and subequal, but 

 contrary to what is the case in P.vulgaris., in the fifth pair the 

 two joints preceding the finger are together slightly longer 

 than in the preceding limbs. 



The colour of this pretty species is orange, banded with 

 yellowish white on the antennae and limbs, nearly uniform 

 on the carapace, but transversely striped with yellowish 

 white on the pleon, the light colour predominating o-t the 

 sides, and also dividing the transverse furrow on the pleon 

 segments along the raised ridge. The length of the larger of 

 two male specimens sent me is about 1 70 mm. or 6 J inches, 

 from rostrum to end of the telson. 



Palinurus longinianus is distinguished both from the 

 present species and from P.vulgaris by having teeth on both 

 margins of the ocular spines, and the first trunk-legs much 

 longer than the second. 



Of the new species, for which I do myself the pleasure of 

 using Dr. Gilchrist's name, the larger specimen was taken in 

 False Bay, the smaller was trawled 25 miles s.w. \ w. from 

 Cape St. Blaize. 



