CANCRHXE 45 



sent a hybrid. The specimen at hand and the hairy extreme of antennar- 

 ius figured in plate XI, fig. 32, resemble each other very closely in the 

 areolation and pubescence of the carapace and in the appearance of the 

 antero-lateral teeth, differing in the two former characters markedly from 

 the typical antennarius. The frontal regions are similar. The greatest dif- 

 ferences lie in the chelipeds and in the dactyls of the ambulatory legs. Al- 

 though the hand and carpus of this specimen of antennarius is much more 

 spiny than in the typical form, and thus approaches gibbosulus,yet it is less 

 spiny than in the specimen of gibbosulus at hand, particularly in the case 

 of the two at the inner angle of the carpus, which are much less promi- 

 nent and acute. The dactyls of the ambulatory legs in the specimen of 

 antennarius are of the typical form for that species, and are shorter, 

 stouter and more curved than are those of gibbosulus. In the specimen of 

 antennarius the dark color of the dactyl of the cheliped is less extensive 

 than in gibbosulus. The characteristic red spotting of the under surface 

 of antennarius is also absent in the specimen of gibbosulus. 



Cancer jordani Rathbun. 

 Plate X, fig. 30. 



Cancer jordani Rathbun, American Nat., xxxiv, 133, 1900. Rathbun, H. A. E., x, 

 176, 1904. 



This species is represented by over 25 specimens, mostly collected 

 along shore, though a few were dredged. They range in size from 5 to 

 25 mm. in length, and as the largest specimen recorded by Miss Rathbun 

 is 20 mm. in length, a figure is given of the largest individual and a de- 

 scription partly in the words of Miss Rathbun (H. A. E., x, 176). The 

 series includes two egg-bearing females, the only ones which I have seen ; 

 their size, as seen from the table of measurements, is below that of many 

 of the other specimens, both male and female. 



Carapace more than one and one-fourth times as wide as long. The 

 proportion in the large male here described is 1.33 to I, but this varies 

 with age: see table of measurements. (The statement "Length of cara- 

 pace one and a fourth times width" is obviously a misprint, as the length 

 is later given as 15.5 and the width as 19.5 mm.) "Surface hairy and 

 "covered with small crowded scabrous granules. Regions indicated by 

 "narrow and shallow depressions. Teeth of front and lateral border not 

 "thickened as in antennarius; inner orbital tooth very slightly produced; 



