190 A. E. Verrill — Revision Genera and Species of Starfishes. 



specialized actinal fascicles cannot be made a character by which to 

 distinguish them, for they may be present or absent in the same 

 species (e. g. intermedins). Their presence seems to be the normal 

 condition. 



Six species are known to me from off the American coast. Several 

 other species have been described from the East Atlantic. 



Pseudarchaster intermedius Sladen. 



Pseudarchaster intermedius Sladen, Voyage of the Challenger, vol. xxx, p. 115, 



pi. 19, figs. 3, 4 ; pi. 42, figs. 5, 6, 1889. Verrill, Proc. Nat. Mus., vol. xvii, 



p. 249, 1894. Amer. Jour. Sci., xllx, p. 131, 1895. 

 Archaster Parelii {pars) Verrill, Amer. Joum. Sci., vol. vii, p. 500, 1874 (not 



of Diiben and Koren) ; vol. xxiii, p. 140, 1882 ; Rep. U. S. Com'r Fish and 



Fisheries, vol. xi, p. 543, 1884. 



^LATE XXX. Figures 1, la, lb. 



This is the most common species off the eastern coast of the 

 United States and Canada. 



It was taken at about 33 stations by the Albatross and Fishhawk, 

 1880 to 1887, in 85 to 1G08 fathoms, from N. lat. 44° 26' to 37° 59' 

 30". It has also been brought from the fishing banks, off Nova 

 Scotia, by the Gloucester fishermen. 



The variety [insignis) named and described by me in 1895 (p. 

 132), is probably only the fully adult form of this species. The 

 largest example has the larger radius, 75™'° ; the lesser, 23™". It 

 lacks distinct actinal fascioles. These exist, however, in variable 

 numbers, on other similar specimens, of somewhat smaller size, as 

 well as on quite young examples. Their presence does not depend 

 upon age, for they may be absent or present in specimens of equal 

 size. Most specimens have the odd apical oral spine somewhat 

 larger and longer than those adjacent. The genital pores are oppo- 

 site and close to the first pair of dorsal marginal plates. 



Pseudarchaster fallax Perrier. 



Astrogonium fallax Per., 1885. Exp. Trav. et Talism., p. 347, pi. xiii, fig. 



4, pi. XXV, fig. 4, 1894. 

 Archaster Parelii (pars) Verrill, Rep. U. S. Comm. Fish and Fisheries for 

 1883, vol. xi, p. 543, pi. xiii, fig. 37, 1885. 



Plate XXX. Figures 2, 2a. 



This was formerly considered by me a variety of the preceding 

 with narrow dorsal radial areas. 



More recently I have compared our specimens with one of the 

 types of P. fallax Per., in the Mus. of Comp. Zoology. They agree 

 with the latter in all respects. 



