126 BULLETIN 2 01, UNITEiD STATES NATIONAL MUSEUM 



cannot say whether the mouth parts and thoracic limbs conform to 

 Hansen's definition of the genus Synerythrops, to which the species 

 otherwise seems to belong, or at least to approach most nearly. It 

 has the same type of antennal scale, and the telson and uropods are 

 closely similar in form and relative proportions to those of the type 

 species, S. intermedia. S. cruciata differs from S. intermedia in the 

 somewhat larger and longer rostral plate, which partially covers the 

 eyes, in the rather smaller eyes with an ocular papilla, and in the 

 larger number of spines on the lateral margins of the telson. It is 

 also somewhat larger, though Hansen's specimen was immature. 



Genus DACTYLERYTHROPS Holt and Tattersall 



Dactylerythrops Holt and Tattersall, 1905, p. 121. 



DACTYLERYTHROPS BIDIGITATA Tattersall 

 FlQUBE 43 



Dactylerythrops Udigitata Tatteesall, 1907, p. 109 ; 1911b, p. 34, pi. 3, figs. 7-10 ; 

 pi. 4, fig. 1.— Zimmee, 1909, p. 97. 



Occurrence. — East coast of United States: Fish Hawk station 

 1093, latitude 39°56' N., longitude 69°45' W., 349 fathoms, August 

 11, 1882, 1 immature male; Albatross station 2046, 2 males, 2 females, 

 16 mm.; 2172, 1 immature female; 2180, 1 immature male; 2187, 1 

 female; 2213, 6 females, 18 mm.; 2215, 1 male, 2 females, immature. 



Distribution. — New to the American fauna. Hitherto known only 

 from the type locality off the west coast of Ireland. Its range ex- 

 tended now to the east coast of the United States, it is another example 

 of a probably widely spread boreal species penetrating southward 

 wherever conditions are suitable. 



Remarks. — The material is defective, but the peculiar form of the 

 eye and the character of the telson are quite sufficient to recognize the 

 species. The salient characters of this species are given in figure 43. 



Genus DACTYLAMBLYOPS Holt and Tattersall 



Dactylamolyops Holt and Tattersall, 1906a, p. 8. 



DACTYLAMBLYOPS sp. ? 



Occurrence. — California: Albatross station 4536, 1 male, 25 mm. 



Remarks. — This specimen is much too damaged to describe ade- 

 quately, though it appears to belong to an undescribed species. The 

 antennal scales are both broken. The eye is pyriform in shape, with 

 a blunt fingerlike process on the upper inner surface of the eyestalk. 

 The visual elements of the eye appear to be imperfectly developed 

 but the eye is too damaged to be sure on this point. The telson is 

 very massive, almost quadrangular in shape, as long as the sixth 



