NO. 3 GARTH : SOME NEW SPECIES OF BRACHYURAN CRABS 83 



a fine pile, manus with the four largest tubercles forming a superior 

 crest ; outer surface of palm completely roughened, spines on lower half 

 of hand arranged in longitudinal rows. Fingers ribbed and channeled, 

 prehensile edges strongly toothed, tips incurving; dactyl with a tubercle 

 and three spinules above. (See pi. 22, fig. 3.) Minor chela similar to 

 major except that tubercles are even more attenuated, fingers more slen- 

 der, the dactyl provided with two rows of sharp spinules. 



Meri of all ambulatory legs spinulous above, granulate below, spi- 

 nules increasing in size distally, terminal spine a bladelike process. Carpi 

 with two parallel laminate ridges with sinuous margins between which 

 runs a deep, smooth channel, U-shaped in cross section. Propodi with a 

 double row of long, sharp spines. Dactyli exceeding length of propodi, 

 horn tipped; all segments short pubescent with longer marginal hairs. 

 (Seepl. 22, fig. 4.) 



Female abdomen with each segment constricted at base, giving edges 

 a scalloped appearance. Terminal segment nearly as long as broad, sides 

 arcuate. 



Color in life: Carapace bright apricot orange, pubescence pale old 

 gold. Front, orbit, and eyestalk varying shades of orange, cornea bril- 

 liant pansy purple. Chelae reddish orange chrome with tips of tubercular 

 spines nearly white. Fingers brilliant aster purple, extreme tips nearly 

 white. Ambulatoiy legs lighter than carapace with faint indications of a 

 light band on each segment; rims of carpus with a strong purplish hue. 

 (Petersen, taken from an immature female specimen dredged in the 

 Gulf of California, February 13, 1940.) 



Distribution : The finding of a female and one young specimen three 

 miles southwest of San Francisco Island, Gulf of California, Mexico, in 

 43-44 fathoms at Velero Station 1116-40, extends the known range of 

 this species thousands of miles northward from Octavia Bay, Colombia, 

 the type locality. 



Remarks: The proposed new species is placed, with some uncertainty, 

 in the American genus Heteractaea because of the thickened orbital bor- 

 der, lobed below as well as above, the spinulous anterolateral margin 

 trending forward and downward to the anterior corners of the buccal 

 cavity, and the remarkable processes of the carpi of the ambulatory legs 

 which, while not lunate crests, are sufficiently similar in configuration to 

 suggest affinity. The front, while not thick, bears a pair of thickened 

 lobes just posterior to it in exactly the same manner as in H. lunata 

 (Milne Edwards and Lucas) (1843). A comparison with specimens of 



