THE CANCROID CRABS OF AMERICA 93 



under parts white. Corneae mottled white and cinnamon, mostly 

 white. Proximal side of each spine of merus or arm with crimson 

 spot; a crimson liae parallels the posterior white ridge. The carpus 

 has a spot of crimson at articulation; its long spine has a longitudinal 

 splotch of color on the posterior surface, whereas on the anterior 

 surface there is a clay colored one as though the color showed through ; . 

 fringe of hair on this spine between crimson and pomegranate purple. 

 Fingers marked inside with crimson, outside the corresponding spots 

 are clay color. Extremity of dactyls of ambulatory legs crimson, 

 most extensive on first one, diminishing progressively on second and 

 third. Three crimson spots on the coxa-basis of swimming legs; a 

 narrow crimson stripe on last two articles, one parallel to posterior 

 edge of propodus, the other parallel to antero-distal quarter of dactylus. 



Full grown specimens (61257) much as smaller one above. Cara- 

 pace more buff pink with highest ridges touched with cinnamon 

 rufous. Fingers bordered with crimson and maroon; two basal 

 teeth of dactylus and margins of palm white, rest of chela maroon 

 purple and lake red, same color on fringe of hair on carpal spine; 

 ambulatories wine purple. 



Two veiy young, the larger 6 mm. long (61270) have a large spot 

 of vinaceous buff either side of the middle of the carapace; smaller 

 one with darker spots of clay color. 



Eggs (61256), those eyed are Front's brown; those non eyed are 

 a more compact mass, flame scarlet + Saturn red + salmon. (Schmitt.) 



Measurements. — Male (61256), total length of carapace 28.3, 

 width of same 52.5, width measured from base of lateral spine 43.2, 

 fronto-orbital width 20.6, width of front 6.6 mm. 



Range. — From North Carolina to the Province of Sao Paulo, 

 Brazil; 5 to. 208 fathoms. 



Material examined. — See table, pages 94-96. It is worthy of note 

 that whereas this species is abundant on the Florida Keys no remains 

 were found among the contents of the hundreds of fish stomachs 

 examined in recent years. This is attributable to the formidable 

 armature of the chelipeds which is sufficient to ward off the enemy. 



PORTUNUS (ACHELOUS) IRIDESCENS (Rathbun), new combination 



Plate 46 



Nephinus {Hellenus) iridescens Rathbun, Proc. U. S. Nat. Mus., vol. 16, 1893, 

 p. 240 (type-locality, Gulf of California, station 3017, Albatross; type, Cat. 

 No. 17445, U.S.N.M.). 



Diagnosis. — A tooth at posterior angles of carapace. Inner spine 

 of carpus of male as long as palm. Postero-distal end of merus of 

 swimming foot spinulous. 



Description. — Closely related to P. (A.) spinicarpus from which it 

 differs as follows: The posterior corners of the carapace have each a 

 sharp, erect tooth; the principal regions are more prominent; the front 



