Species of Maioid Crustacea. 19 



laciniatus, De Haan, and also apparently to the West-Indian 

 L. Pourtalesii and L. fraterculus, Stm., but differs in the 

 longer spines of the carapace and the form and disposition of 

 the tubercles on the under surface of the anterior legs, and in 

 other characters. 



There is in the British Museum a female from Australia 

 (Stutchbury) in very bad condition, which probably belongs to 

 this species, but differs in the broader, more obtuse and 

 rounded rostrum, and the shorter spines on the posterior margin 

 of the arms. If distinct, it may be named L. latirostris. 



Lambrus Holdsworthi, sp. n. (PI. V. fig. 3.) 



Carapace broader than long to base of rostrum ; branchial 

 and cardiac regions covered with small, scattered, unequal 

 tubercles ; there are three blunt prominences or spines in a 

 median longitudinal series, of which one is on the gastric and 

 two are on the cardiac region. The antero-lateral margins are 

 armed with about ten small tubercles, after which follow, on the 

 postero-lateral margins, three prominent triangular flattened 

 spines, which are granulated on their margins ; the last of these 

 is the smallest; the posterior margin is tuberculated, three of the 

 tubercles being larger. The rostrum is prominent, triangular, 

 smooth, and slightly concave above. The anterior legs have 

 the arms tuberculate and spinose on their upper surface and 

 anterior and posterior margins ; of these, four on the anterior 

 margin, three to four on the upper surface, and two to three 

 on the posterior margin are larger ; the wrist is tuberculated 

 on its upper surface and armed with spines, similar to those 

 of the hand, on its outer margin ; the upper surface of the 

 hand is flat and smooth, but has a few irregular tubercles near 

 its posterior margin ; on its anterior margin are about a dozen 

 flattened triangular spines, which increase in length distally ; 

 on the posterior margin are about nine flattened triangular 

 spines, of which four are larger ; the inferior surface of wrist 

 and hand has a longitudinal series of small tubercles, but is 

 elsewhere smooth. The merus joints of the ambulatory legs 

 are spinulose on their upper margins. Length to base of 

 rostrum about 6 lines, breadth about 7 lines. 



Hob. Ceylon {E. W. H. Holdsworth, Esq.). 



This species is apparently most nearly allied to L. lacinia- 

 tus, De Haan (among the forms having the merus joints of 

 the ambulatory legs spinulose above), but differs in the form 

 and number of the spines of the anterior legs. In L. Holds- 

 worthi the spines of the outer margin of the hand are much 

 broader and in contact at their bases. I may notice that the 

 subhepatic region is channelled, but the channel does not lead 



2* 



