4 BULLETIN OF THE 



Euprognatha rastellifera Stimpson. 



Stimpson, Bull. Mus. Comp. Zool., II. p. 123, 1870. 



A. M. -Edwards, Crust. Kegion Mexicaine, p. 183, PI. XXXIII. fig. 2, 1878 ; Bull. 



Mus. Comp. Zool., VIII. p. 7, 1880. 

 Smith, Proc. National Mus., "Washington, III. p. 415, 1SS1. 



This is apparently by far the most abundant of all the Brachyura along our 

 whole eastern coast south of Cape Cod in the belt from 50 to 200 fath. depth. 

 In the U. S. Fish Commission dredgings off Martha's Vineyard, many thou- 

 sands of specimens were often taken at a single haul of the trawl. 



CANCROIDA. 



Cancer irroratus Sat. 



Cancer irroratus Say, Jour. Acad. Nat. Sci. Philadelphia, I. p. 59 (cf only, 9 being 

 C. borcalis), PL IV. fig. 2, 1817. 



Stimpson, Ann. Lyceum Nat. Hist. New York, VII. p. 50 (4), 1859. 



Smith, Trans. Conn. Acad., V. p. 38, 1879. 



Kingsley, Proc. Acad. Nat. Sci., 1879, p. 391, 1880. 

 Platycarcinus irroratus M. -Edwards, Hist. Nat. Crust., I. p. 414, 1834. 



DeKay, Nat. Hist. New York, Crust., p. 6 (in part), PI. II. fig. 2, 1844. 

 Cancer Sayi Gould, Invertebrata Massachusetts, 1st ed., p. 323, 1841. 

 Platycarcinus Sayi DeKay, op. cit., p. 7, 1844. 

 Cancer borcalis Packard, Memoirs Boston Soc. Nat. Hist., I. p. 303, 1S67. 



Station. N. Lat. W. Long. Fathoms. Specimens. 



314 32° 24' 0" 78° 44 0" 142 2 ? . 



327 34° 0'30" 76° 10' 30" 178 6^,2?. 



333 35° 45' 25" 74 c 50' 30" 65 1 $. 



The occurrence of this abundant shallow-water and littoral northern species 

 in deep water south of Cape Hatteras is very interesting. As a littoral species 

 it is apparently not abundant south of Cape ITatteras, and on the New England 

 coast fully grown individuals are certainly rare belowtwenty fathoms. The 

 alcoholic specimens from deep water are lighter in color than similar Bpeeimenfl 

 from shallow water, but this may be partially .hie to the foci thai they are 

 entirely devoid of all algoid growths which are common on shallow-water 

 individuals ; and the edges of the carapax appear more acutely dentated, which 

 ily explained by the fad thai they are not subjected to the abrading in- 

 auence of sand and gravel as the shallow-water specimens are. The following 

 measurements show no appreciable difference from shallow-water specimens in 

 the proportions of the carapax. 



