COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 187 



General color of the dorsal surface of the cephalothorax and legs 

 yellowish tending to rose with red-scarlet lines; legs elegantly and regu- 

 larly striped with the same color. Four longitudinal lines of the same 

 color traverse the abdomen. (Nobili, 1901, of a preserved specimen) 



Ecology: This species has been taken under stones in the littoral. 

 It has also been dredged in depths to 12 fathoms, and taken from 

 Lessonia holdfasts at 7 fathoms. It has been reported (Haig, 1955) as 

 a commensal with sea stars, Stichaster striatus Miiller and Troschel and 

 Meyenaster gelatmosus (Meyen). The Peruvian specimen from which 

 Anker Petersen prepared the color notes, above, was "associated with 

 anemone." 



Ovigerous females have been encountered in every month from Oc- 

 tober through February. 



Range: San Lorenzo, Peru, south to San Vicente, Chile. Shore to 

 12 fathoms. 



EUCERAMUS Stimpson 1860 

 Euceramus Stimpson, 1860, p. 445 (type species Euccratnus praelongus 

 Stimpson, 1860, by monotypy). 



Carapace considerably longer than broad, markedly convex trans- 

 versely ; lateral margins subparallel. Front prominent, very narrow, 

 tridentate. Orbits shallow; outer orbital angles not produced; eyestalks 

 slender, retractile. Hepatic margin with a large orbitlike concavity, its 

 outer angle formed by a tooth. Posterior to this hepatic tooth a distinct 

 epibranchial spine, the two separated by a notch. 



Basal segment of antenna either very short, without projections, or 

 else produced inward and forward and narrowly in contact with an- 

 terior margin of carapace. First and second movable segments long, 

 broader than eyestalk; third short. 



Basal segment of antennule much longer than broad, with one or 

 more strong projections on its anterior margin, and fringed internally 

 with long plumose hairs. 



Chelipeds small ; carpi subcylindrical ; hands weak, subcylindrical or 

 somewhat flattened, fingers opening vertically. Walking legs subcylin- 

 drical ; no posterior spinules on propodus ; dactylus ending in a simple 

 spine, posterior supplementary movable spinules absent or vestigial. 



Telson of abdomen longer than broad, composed of seven plates. 



Contains three species, two from Pacific and one from Atlantic 

 America. 



