348 ME. J. E. HENDERSON — A CONTEIBUTION 



Very fine red lines are visible on the carapace, usually arranged in pairs, running 

 up some of the spines and on the supraocular spine and rostrum ; they are also seen 

 crossing transversely the upper surface of the chelipedes and ambulatory legs. 



The carapace is 93 mm. long, 7*3 mm. broad, chelipede 10 mm. long, first ambulatory 

 leg 12 mm., second ambulatory leg 11 mm. 



I have named the species after Mr. E. W. Oates, who discovered it and a number of 

 other interesting forms referred to in this paper. 



Genus MiciPPA, Leach. 



21. MiciPPA Philyra (Herbst). 



M. Philyra (Herbst), Miers, Ann. Mag. Nat. Hist. ser. 5, vol. xv. p. 6 (1885). 

 (= M. platipes, Riipp., M. bicarinata, Ad. & Wh., M. hirtlpes, Dana, M. spatulifrons, A. Milne-Ed vr.). 



Rameswaram and Tuticorin [Thurston). Not uncommon on the reef at Rameswaram 

 {J. B. E.). 



Distribution. Red Sea, Cape of Good Hope, and Mauritius, to New Caledonia and Fiji, 



22. MiciPPA Thalia (Herbst). 



M. Thalia (Herbst), Miers, Auu. Mag. Nat. Hist. ser. n, vol. xv. p. 10 (1885). 



(= M. inernii.s, Hasw., M. jMsilla, Bianconi). 



Tuticorin and Muttuwartu Par (Thurston) ; Rameswaram (J. R. H.). 

 Like the other species of the genus, nearly always overgrown with sponges. 

 Distribution. Red Sea and Natal coast to New Caledonia. 



23. Micippa mascarenica, Kossmann. 



M. Philyra, var. mascarenica , Kossmann, Malacostraca in Zool. Ergebn. Reise Rothen Meeres, p. 7, 

 pi. iii. fig. 2 (1877). 



M. mascarenica, Miers, Ann. Mag. Nat. Hist. ser. 5, vol. .w. p. 7 (1885). 



(= M. superciliosa, Hasw., Paramicippa asperimanus, Miers). 



Gulf of Martaban, three females, one with ova and one bearing a Sacculina {Oates). 

 Distr/btitioii. Red Sea, Mauritius, Singapore, N. Australia. 



24i. Micippa margaritifera, n. sp. (PI. XXXVI. figs. 5-7.) 



Gulf of Martaban, a male and two females with ova {Oates). 



The carapace is but little convex, with the hepatic regions deeply excavate, and the 

 surface everywhere strongly granulated, though fewer granules are present in the hollows. 

 Two short blunt spines occur on the margin of the posterior branchial area, and a third less 

 marked is placed internal to these and on the surface of this region. The cardiac area is 

 somewhat circumscribed, and behind it, nearly at the posterior margin of the carapace, 

 there is a small strongly granulated elevation, with a similar but slighter elevation on 

 each side. The anterior half of the lateral margin has a few irregular spines, the largest 

 placed opposite the posterior part of the hepatic depression. The front is vertically 

 deflexed, witli the surface granulated and the apex retroflexed, terminating in two 

 obtusely rounded equal lobes separated by a median notch, and on the outer margin of 



