82 Bulletin VanderMlt Marine Museum, Vol. V 



Distribution: Red Sea: Djibouti, (Nobili) ; Station 4, Sudanese 

 Red Sea, (Laurie) ; Indian Ocean, (Fabricius; H. M. Edwards) ; Kob 

 Chang and Koh Kong, Gulf of Siam, (Rathbun) ; Singapore, (Nobili) ; 

 Geelvink Bay, (de Man); reefs, Hawaii, (Miers; Lenz) ; Hawaiian 

 Islands, (Gibbes; Randall) ; Honolulu, Pearl Harbor, also lee coast of 

 Oahu, Heeia; Mauna Loa beach, Hilo, Hawaii, (Rathbun) ; Fanning 

 Island, (Streets; Edmondson) ; Southport, Queensland, (Boone); 

 subfossil from Mauritius and from New Channel, mouth of the Bris- 

 bane River, Moreton Bay, Australia, (Etheridge and McCulloch). 



Material examined : One male taken at Southport, Queensland, 

 Australia, September 24, 1931, by the ''Alva." 



Technical description : Carapace widely hexagonal, its greatest 

 width being from tip to tip of the anterolateral spines, which is about 

 two and a half times the median length ; the true frontal margin pro- 

 jects forward as a narrow septum between the bases of the eyestalk 

 and widens into a narrow process on each side, that tapers outwardly 

 and extends to the upper distal angle of the antennular fossett, lying 

 in the normal relation to the antennae and antennules. 



The anterolateral borders extend the full width of the carapace, 

 the upper margin as a finely beaded, oblique line, sloping gradually 

 from the narrowed deflected frontal septum to the base of the lateral 

 spine, from which point it continues as a concave curve to the tip of 

 the spine. Below this lies the deep groove which is an extension of 

 the true orbit and into which the fantastically long eyestalks fit, when 

 retracted; the laminate upper margin of the concave curved region 

 near the base of the spine being more produced than the rest of the 

 margin, to protect the large cornea, when retracted. Below this lies 

 the inferior orbital border, which is more prominent and more oblique 

 and from the inner submedian angle decreasing outwardly is produced 

 in advance of the superior border. The lateral spine is strong and is 

 directed outward and forward with its anterior margin excavate by 

 the continuation of the orbital groove. Behind the large spine and at 

 its base there is a very small, acute, outward-directed spine and run- 

 ning inward from its apex there is a raised granular line which curves 

 inward to the cervical sulcus. The postlateral margins are slightly 

 sinuate, finely beaded, and decidedly convergent. The posterior mar- 

 gin is lightly carinated and this carina curves above the base of the 

 fourth and fifth pairs of legs. Just anterior to the curved sulcus that 

 extends inward from the second lateral spine, there is a definite shal- 

 low sulcus which is emphasized by a line of coarse pittings. The cer- 



