COMPLETE HAIG: EASTERN PACIFIC PORCELLANIDAE 195 



Material examined: See Table 59. 



Measurements: Males, 2.2 to 3.8 mm; non-ovigerous females, 3.3 

 to 4.0 mm ; ovigerous females, 2.0 to 5.5 mm. The male holotype meas- 

 ures 3.5 mm in length, 2.5 mm in breadth ; an ovigerous female para- 

 type, 4.0 by 2.8 mm. 



Color: Carapace with median longitudinal area white with a yellow 

 cast, branchial areas brown with a greenish cast. Antennules blue, flag- 

 ellum yellow. Palp of maxillipeds light green. Chelipeds and ambulatory 

 legs with a whitish ground banded with brown. The carapace colors 

 extend onto the first two abdominal segments. (Glassell, from notes 

 on a live specimen by W. A. Kirk) 



Subcontrary triangular space of white covering frontal region and 

 ending with distal point touching cardiac region. Cardiac and intestinal 

 regions almost covered with white. Branchial regions closely netted with 

 carmine red and yellow green. Chelae pale gray with a touch of red 

 and green on merus. Carpus and hand with fine network of carmine 

 and blue green. Fingers pale blue gray. Ambulatory legs white with 

 two circular bands of carmine on merus and one on distal end of carpus. 

 Eyestalk white with streak of carmine. Cornea of eye bright chrome 

 yellow. Antennules pale blue with flagellum yellow. Visible portion of 

 abdomen on dorsal side with two longitudinal broad stripes of red and 

 green netting. Pterygostomian region and maxillipeds with a few 

 blotches of red. No other color on ventral side. (Petersen, of a live 

 specimen from the Gulf of California) 



Ecology : 'Tound at extreme low water commensal on the sand star- 

 fish Luidia Columbia (Gray). A pair of crabs was usually found on a 

 single starfish, one on the dorsal, the other on the ventral side." 

 (Glassell) Velero III specimens from Punta Penasco, Gulf of Cali- 

 fornia, were commensal on Luidia phragma H. L. Clark dredged in 

 3 to 10 fathoms. Specimens taken in Golfo de Fonseca by R. Paessler 

 were from sea stars dredged in 4 fathoms; a few of those collected by 

 the Zaca in the same area were from sea stars taken in 4 to 7 fathoms. 

 Luidia foliolata Grube was "taken at various stations between Ten- 

 acatita Bay, Mexico, and Corinto, Nicaragua, in 2-30 fms." (Clark, 

 1940, p. 333) by the 1937-38 Zaca Expedition, and it was probably 

 this sea star from which the Minyocerus of that expedition was re- 

 covered. The western Atlantic member of the genus, Minyocerus 

 angustus (Dana), 1852, is a commensal with Luidia clathrata (Say). 



