104 Bulletin Vanderhilt Marine Museum, Vol. V 



Euxanthus melissa (Herbst). 

 Plate 56. 



Type: The type locality was unknown to Herbst; the type speci- 

 men is deposited in the Berlin Museum. 



Distribution : Feejee Archipelago, Tongatabu, (Dana) ; Australia, 

 coasts of Cochin China, Tile Poulo-Condore, (A. M. Edwards) ; Caspar 

 Straits, (Stimpson) ; Tuticorin, Ceylon, (Henderson) ; Trincomali, 

 Ceylon, (Muller) ; Darros Island, (Miers) ; Owen and Elphinstone 

 Islands, Mergui Archipelago, (de Man) ; Bali, (Boone) ; rare at New 

 Caledonia, (A. M. Edwards) ; Tamatave, Madagascar, (Miers). 



Material examined: One male, in coral, Temukus Roads, Bali, 

 Dutch East Indies, October 25, 1931. 



Technical description : Carapace oval, very convex in both direc- 

 tions and entirely lobulated, surface of lobules smooth, grooves wide 

 and clear ; length of carapace two-thirds of width ; frontal margin one- 

 fourth of total width, sinuate, deflected, consisting of two wide rounded 

 lobes, separated by a median groove and set apart from the orbital 

 border by a distinct notch from which a groove runs backward de- 

 fining the terminal inner half of the orbital border, the outer half of 

 the orbital border is a thickened ridge, as is also the inferior orbital 

 border except for the inferior inner orbital tooth which is a con- 

 spicuous blunt triangle, visible dorsally. The frontal and anterolateral 

 borders are widely rounded, the anterolateral border being cut into 

 four teeth in addition to the inferior orbital tooth which is set apart 

 by a shallow sulcus. The first anterolateral tooth is blunt and is cir- 

 cumscribed, immediately behind it is a small lobe and above this is a 

 very small lobe behind the eye. The second tooth is wide with an 

 oblique anterior border terminating in blunt angulation and a short 

 posterior border ; its upper surface is broken into two marginal lobules, 

 the anterior one being quite small and not very convex. The third 

 tooth is more conspicuously angulated with a short anterior margin 

 and a longer posterior margin ; the fourth tooth is the most conspicuous 

 of the entire series and is situated at the point of union of the short 

 concave postlateral margin which is only about half as long as the 

 anterolateral margin, or about equal to the width of the heavily 

 carinated posterior margin. There are a pair of small, wide lobules 

 immediately above the posterior margin, and above these on either 

 side, adjacent to the postlateral margin, there is a large irregular low 

 lobule, with broken surface. The intestinal region is circumscribed as 



