COMPLETE HAIG : EASTERN PACIFIC PORCELLANIDAE 207 



The specific name is from the Latin corbis, a basket, and colere, to 

 dwell in, inhabit, in reference to the probable association of the species 

 with basket stars. 



Range: At present known only from the type locality, Rocas Consag, 

 Gulf of California, 10 to 25 fathoms. 



PISIDIA Leach 1820 



Pisidia Leach, 1820, p. 53. Type species: Pisidia linnaeana Leach, 1820 



(present designation). 

 Porcellanides Czerniavsky, 1884, p. 109 (type species Porcellanides kricz- 



agini Czerniavsky, 1884, by original designation). 

 Streptochirus Stimpson, 1907, p. 188. Type species: Porcellana serrati- 



frons Stimpson, 1858 (present designation). 



Carapace approximately as long as broad, or slightly longer. Lateral 

 margins with spinules or strong spines posterior to cervical groove. 

 Front prominent, strongly tridentate or trilobate. Eyestalks short and 

 stout, retractile. 



Basal segment of antenna strongly produced inward, forming a 

 partial suborbital margin; produced forward and broadly in contact 

 with anterior margin of carapace, with movable segments removed from 

 orbit. 



Basal segment of antennule with several spines on anterior margin. 



Chelipeds large, strong, subequal. Fingers of one or both chelipeds 

 twisted out of plane with manus. Propodus of walking legs with spinules 

 on posterior margin; dactylus ending in a simple spine, posterior mar- 

 gin with several movable accessory spinules. 



Contains several species; a single representative in the eastern Pa- 

 cific. 



Remarks: The available but neglected name Pisidia is revived for 

 the reception of a group of species usually included in Porcellana. 

 Stimpson (1907) recognized the discrete nature of this group, but did 

 not separate it from Porcellana. It is distinguished from all other porcel- 

 lanid genera by the combination of characters given above; additional 

 characters may become apparent when the species included in it are 

 studied as a unit. 



The name was originally proposed by Leach (1820, p. 53), who used 

 it for several species distinguished from Porcellana (which at that time 

 contained all known members of the Porcellanidae) on the basis of one 

 character only, the shape of the outer maxillipeds: "Les deuxieme, 



