No. 10 GARTH : BRACHYURAN FAUNA OF THE GALAPAGOS 429 



96-33. Darwin Bay, Tower Island, shore, Feb. 24, 1933, 1 ovig. 



female. 

 101-33. Darwin Bay, Tower Island, shore, Feb. 26, 1933, 2 ovig. 



females. 

 152-34. Tagus Cove, Albemarle Island, coral, Jan. 14, 1934, 3 males, 



1 female, 1 young. 

 154-34. Reef north of Tagus Hill, Albemarle Island, reef, Jan. 15, 



1934, 3 males, 1 female, 1 young. 

 168-34. Academy Bay, Indefatigable Island, shore, Jan. 20, 1934, 1 



male, 1 female. 

 174-34. South Seymour Island, shore, Jan. 22, 1934, 1 male, 1 young. 

 175-34. North Seymour Island, shore, Jan. 22, 1934, 1 male, 1 female. 

 306-35. Marchena Island, shore, Dec. 2, 1934, 1 specimen. 

 316-35. Opposite Gordon Rocks, Indefatigable Island, 20 fms, Dec. 8, 



1934, 1 ovig. female. 

 333-35. James Bay, James Island, shore, Dec. 11, 1934, 2 specimens. 

 359-35. Osborn Island in Gardner Bay, Hood Island, shore, Dec. 19, 



1934, 7 males, 3 females. 

 361-35. Gardner Bay, Hood Island, 12 fms, Dec. 19, 1934, 1 specimen. 

 782-38. Darwin Bay, Tower Island, shore, Jan. 16, 1938, 1 male, 4 



females. 

 784-38. Darwin Bay, Tower Island, shore, Jan. 17, 1938, 1 male, 1 



young female. 

 789-38. South Seymour Island, shore, Jan. 19, 1938, 2 young males. 

 804-38. Onslow Island, off Charles Island, coral, Jan. 23, 1938, 2 

 males. 

 Measurements. — Largest male: length 13.0 mm, width 18.2 mm, 

 cheliped 17.4 mm, chela 9.2 mm, dactyl 5.2 mm. 



Color in life. — Ground color of carapace reddish naphthalene violet. 

 Tubercles and margin dark dull purple. Outer side of cheliped light 

 brilliant neutral red extending slightly on movable finger. Fingers dull 

 dark yellow, lighter toward tip. Ambulatory legs Brazil red. Color 

 extends half way on dactyl, which is dull yellow. Nail banded with brown 

 at root, bright yellow at tip. Ventral side jasper red; abdomen brick red; 

 legs scarlet beneath. (Petersen) 



Habitat. — In circular depressions, particularly in sponges. 

 Depth. — An intertidal species; occasionally to 15 or 20 fms. 

 Remarks. — These Platypodias fit so snugly into the circular depres- 

 sions which they have hollowed out for themselves that they are likely 

 to be overlooked. They were most abundant in rocks near a sandy shore 

 where a clump of dead trees forms a conspicuous landmark a few miles 

 north of the anchorage at Cartago Bay, where 19 were found. 



