A. JEJ. Verrill — Mevision Genera and Species of Starfishes. 193 



the dentaiy suture. The adambulacral plates have a curved, pal- 

 mate, strongly projecting furrow-series of five or six unequal blunt 

 spinules; the two or three median ones are larger and more slender, 

 compressed ; the two distal ones are shorter, stouter, flattened or 

 spatulate, but on the distal half of the rays they are all slender. The 

 actinal side is covered with shorter, obtuse or clavate spinules, either 

 clustered or in two or three irregular rows, but without any larger 

 central spines. 



The jaws are not prominent ; there is an odd apical spine on each 

 jaw, distinctly larger and longer than the rest ; the furrow margin 

 bears ten to twelve small obtuse spinelets, like those of the adambu- 

 lacrals ; the distal ones are rather larger than the others. On the 

 sutural margin there are about ten shorter blunt or clavate spinules, 

 a little larger than the actinal granules ; another small intermediate 

 row of similar ones covers the actinal surface. 



Taken by the Albatross at station 2751, in fathoms. One 



example (No. 18,448a). 



Pseudarchaster concinnus Verrill. 



Pseudarchaster concinnus Verrill, Proc, U. S. Nat. Mus., vol. xvii, p. 250, 1894. 

 Amer. Jour. Sci., xlix, p. 132, 1895. 



Plate XXX. Figures 3, 3a, 36. 



Taken at 3 stations between N. lat. 41° 28' 30" and 41° OT; in 

 1188 to 1791 fathoms. 



In this species the genital pores are large and usually plainly 

 visible, without preparation. They are situated far apart on the 

 dorsal surface, about opposite the second pairs of dorsal marginal 

 plates; they are separated by about nine radial rows of abactinal 

 interradial plates ; about six plates intervene between the pore and 

 the marginal jjlate. 



The jaws often have an odd apical oral spine, only a little longer 

 and lai'ger than those adjacent. In other cases no such spine is 

 found, the apical spines being all paired. This variation may occur 

 on the different jaws of the same specimen. 



In this species there is less distinction between the smaller and 

 larger spines on the lower marginal plates, there being many inter- 

 mediate in size, and the largest not very large, in three or four 

 irregular rows. The adambulacral and dentary spines are shorter, 

 those of the actinal side of the jaws being much less conspicuous. 

 The larger central spine of the actinal plates is also less prominent. 



Trans. Conn. Acad., Vol. X. August, 1899. 



13 



