496 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



Range. — Charles and Barrington Islands, Galapagos Islands. 



Diagnosis. — Carapace convex, polished, faintly granulate anteriorly. 

 Posterolateral borders exceeding anterolateral; 2 denticles on antero- 

 lateral margin. Granules of cheliped flattened, not arranged in rows. 

 Minor chela excavate, fingers slender, curved, M^ith knifelike edges. 



Material examined (31 specimens from 4 stations). — 

 180-34. Sulivan Bay, James Island, 3^^ fms, coral, Jan. 22, 1934, 1 



male, 4 females (3 ovig.). 

 194-34. Post Office Bay, Charles Island, coral from Onslow Island 



crater, Jan. 27, 1934, 7 males, 11 females. 

 804-38. Onslow Island near Charles Island, Pavona coral, Jan. 23, 

 1938, 2 males, 4 females, (the type series, including the male holo- 

 type, AHFno. 385). 

 811a-38. Barrington Island, Pavona coral, Jan. 26, 1938, 2 females. 



Measurements. — Male holotype: length 3.7 mm, width 4.6 mm, 

 chela 4.9 mm; female allotype: length 3.9 mm, width 5.5 mm. 



Color in life. — Ground color of carapace ivory yellow to cream buff 

 with designs of Eugenia red and grass green on posterior and Brazil red 

 and cedar green on anterior areas. Cheliped clear creamy white with coral 

 red on merus and carpus. Fingers hazel brown at base, becoming lighter 

 toward tips. Ventral side clear white with tinge of bluish lavender. 

 (Petersen) 



Habitat. — Pavona coral. 



Depth. — 2-35^ fms. 



Pemarks. — The compact heads of "brain coral" {Pavona sp.) allow 

 much less freedom of movement for the crustaceans which inhabit their 

 interstices than do the multiramose heads of Pocillopora. The Pavona 

 colony is therefore made up of fewer and less active species than the 

 Trapezias and DomeciaSj the alpheid and peneid shrimps of the Pocillo- 

 pora, which indeed were totally lacking in the three loads of Pavona 

 cracked by Velero III parties. In their place are the delicate Maldivia 

 and an even more fragile shrimp, which has been turned over to Dr. W. 

 L. Schmitt for study. Although an effort was made to find specimens in 

 sitUj none were observed as the cracking with geological hammers pro- 

 ceeded. All specimens were recovered from the rinse water at the bottom 

 of the bucket. 



