726 ME. W. F. LANCHESTER ON CRUSTACEANS [June 19, 



The carapace is closely granulated, a few of the granules being 

 larger than the others, more especially one on each branchial 

 region, and one on the cardiac. The sides are irregularly tuber- 

 culate, two fairly prominent tubercles may be seen close behind 

 the eye, and two more farther back, one on the branchial angle, 

 the other on the postero-lateral margin. The middle line of the 

 carapace is somewhat elevated ; the hepatic regions are, as usual, 

 very depressed. As regards the rostrum, the upper half is obliquely 

 deflexed, the lower half vertically ; its surface is granular and 

 obtusely bicarinate, so as to form a median and two lateral grooves, 

 the median terminating in the wide notch which separates the two 

 lobes of the distal margin. The chelipedes are small and quite 

 smooth ; the distal half of the upper margin of the arm is strongly 

 keeled, but the carina is not dentate. Ambulatory legs densely 

 hairy, otherwise smooth : the meri are rather broad, but not so 

 much as those of M. curtispina. The orbital margins are prominent ; 

 a single closed fissure above, and two below; pterygostomian regions 

 smooth, and profoundly excavate. Basal joint of antennse smooth, 

 and the next two joints fairly narrow. The fingers of the cheli- 

 pedes do not meet in their proximal half. Colour of carapace 

 brick-red, touched with light yellow; chelipedes light yellow, 

 distal two-thirds of fingers brown. 

 Dim. (J 9 x 11. ? 9-5 x 11-5. 



XII. Genus Lambrus Leach. 



17. Lambrus hoplonotus Ad. & White. 



Lambrus hoplonotus. Ad. & White, ' Samarang ' Crust, p. 35, 

 pi. vii. f. 3 (1848); Hasw. Cat. Austr. Crust, p. 33 (1882); 

 Henderson, Trans. Linn. Soc, Zool. vol. v. p. 351 (1893). 



Hah. Singapore ; 10 fms. Two females, of the var. planifrons. 



Dim. $ 9-25x8. $ 9-25x8. 



18. Lambrus talidus de Haau. 



Parthenope (Lambrus) valida, de Haan, Crust. Japon. p. 90, 

 pi. xxi. f, 1, & pi. xxii. f. 1 (1839). 



Lambrus validus, Ad. & White, ' Samarang ' Crust, p. 29 (1848). 

 Hub. Singapore ; 15 fms. One male. 

 Dim. 30-25x26-5. 



19. Lambrus longispinus Miers. 



Lambrus loayispinus, Miers, Ann. Mag. Nat. Hist. ser. 5, vol. iv. 

 p. 18 (1879). 



Lambrus spinifer, Hasw. Proc. Linn. Soe. N. S. W. vol. iv. 

 p. 451, pi. xxvii. f. 4 (1880). 



Lambrus longispinus, Miers, * Alert ' Crust, p. 199 (1884) ; Walker, 

 Journ. Linn. Soc., Zool. vol. xx. p. 109 (1887). 



Hob. Singapore ; 6-8 fms. Two males. 



Dim. e 10-25 x 10-5. 6 16 x 16. 



