124 Bulletin Yanderhilt Marine Museum, Yol. Y 



Subfamily : Actaeinae. 



Genus: ACTAEA De Haan. 



Actaea hirsutissima Euppell. 

 Plate 66. 



Type : The Red Sea is the type locality of this species ; the depository 

 is the Zoological Museum, Frankfort-on-Main. 



Distribution: Red Sea, (Ruppell; H. M. Edwards: Nobili; 

 Odhner) ; Bitter Lakes, Red Sea, (Caiman) ; Stations 5 A, B, C, and 

 E, Sudanese Red Sea, (Laurie) ; Red Sea, near Djeddah, (de Man) ; 

 Payta, (Cano) ; Oceania, Indian Ocean, (Heller) ; Andamans and 

 Nicobars, (Alcock) ; Beagle Bay, Wolverine Pass, (Nobili) ; Rotuma, 

 (Borradaile) ; Tahiti, Society Islands, (Heller; Rathbun; Raiatea 

 Island, Society Islands, (Boone) ; Upolu, Samoa, (Dana) ; Samoa, 

 (Ortmann, Alcock); Hawaii: Puako Bay, Penguin Bank, 14 to 28 

 fms., near Modu Manu, 26 to 33 fms., (Rathbun) ; Palmyra Island, 

 (Edmondson) ; Seychelles and Mauritius, (Richters) ; Salomon, 

 Egmont, Seychelles, Coetivy, (Rathbun) ; Grand Port and Chaland, 

 Mauritius, (Bouvier) ; South Africa, (Stebbing) ; Palm Islands, 

 Queensland, (Boone). 



Material examined : One large male and one female, taken in coral 

 at Falcon Island Reef, Palm Islands, Queensland, Australia, October 

 7, 1931. Two small males and one female from the same locality. One 

 specimen, taken in coral at Teviatoa Reef, Raiatea Island, Society 

 Islands, South Pacific Ocean, August 2, 1931. 



Technical description : Large male : Carapace ovoid, five-sevenths 

 as long as wide, 20 mm. long, 28 mm. wide, convex on the anterior two- 

 thirds; the frontal and anterolateral margins are widely and ex- 

 quisitely arched, more convex than are those of A. tomentosa (H. M. 

 Edwards), and with the posterolateral margins a trifle less concave. 

 The entire carapace is completely areolated in bold relief, the furrows 

 separating the lobules being deep and smooth, the lobules numerous, 

 elevated and very convex, and entirely covered by closely packed, 

 pearly convex granules, which give the lobules a berry-like formation, 

 between and around the bases of the granules, but not in the fur- 

 rows, are numerous short stiff coarse bristles that of themselves do not 

 form a coating, or conceal the ornamentation of the carapace, but 

 which serve to catch and hold detritus and minute organisms that do 

 conceal the texture of the carapace. There are about 32 to 34 lobules, 



