INACHKMB 35 



median tubercles are apparently less prominent, and that part of the tuber- 

 cles, especially those in the posterior region, are tipped with setae. All 

 were much covered with sponges of various kinds and the like. The 

 color of the carapace is a light tan mottled with dark brown ; the ambula- 

 tory legs are barred with reddish brown, and the chelipeds, with the 

 exception of the light tips of the fingers, are a still more pronounced red. 

 This species has not been before recorded north of San Pedro. 



Genus CHIONOECETES Kroyer. 



Chionoecetes Kroyer, Naturh. Tidskrift, (i), 2, 249, 1838 (Type Chionoccetes 

 opillio (Fabricius)). 



Chionoecetes tanneri Rathbun. 

 Plate VII, fig. 19. 



Chionoecetes tanneri Rathbun, Proc. U. S. Nat. Mus., xvi, 76, pi. iv, figs. 1-4, 1893. 

 Holmes, Occas. Papers Calif. Acad. Sci., vii, 40, 1900. Rathbun, H. A. E., 

 x, 174, 1904. 



Though there are no specimens in the University collection which 

 are known definitely to have come from Monterey Bay, this species was 

 obtained, according to Dr. Fisher, in large numbers by the "Albatross" 

 while dredging at Monterey. 



Superfamily BRACHYRHYNCHA 



Family CANCRID^E. 

 Genus CANCER Linnaeus. 

 Cancer Linnaeus, Syst. Nat. ed. 10, vol. i, 625, 1758. 



The genus Cancer appears to reach its highest development in the 

 north Pacific, and on the west coast of the United States is represented, 

 according to Miss Rathbun, by nine species. One of these C. magister 

 is the common market crab of the whole coast, and with the exception of 

 one or two other species of Cancer C. productus, C. antennarius is the 

 only crab used as an article of food, so that the genus assumes consider- 

 able economic importance. Seven species have been reported from Mon- 

 terey Bay: productus, magister, gracilis, gibbosulus, jordani, antennar- 

 ius and oregonensis. I have obtained all these with the exception of 

 oregonensis. 



