382 Verrill, Notes on Radiata. 



Ptilosarcus G-urneyi Gray. 



Sarcoptilus {Ptilosarcus) Gurneyi Gray, Ann. and Mag. N. H., vol. v, p. 23, pi. iii, 

 fig. 2, 1860. 



Pennatula tenua Gabb, Proc. Gal. Acad. Nat. Sci., ii, p. 166, 1862. 

 Ptilosarcus Gurneyi VerriU, Proc. Essex Inst, ^1865, p. 183. 



Puget Sound, Washington Territory, — Dr. C. B. Kennerly. 

 Family, Virgularid^. 



Stylatula Verrill, 1864. 



Polyps forming clusters upon the upper side of the lateral processes, 

 which are supported beneath by conspicuous, sharp, radiating, spine- 

 like spicula, which are much expanded at the base and divided into a 

 number of irregular teeth. Besides these there are numerous, much 

 smaller, acicular spicula imbz'icated at the base of the large ones and 

 imbedded in the cojnenchyma. The stem is long and slender, as in 

 Virgularia^ and the lateral processes become obsolete below. The ba- 

 sal portion is naked, enlarged and bulbous at the base. The axis is 

 almost cylindrical, stony, with a radiated librous structure, and passes 

 through nearly the entire length. This genus is, as yet, known only 

 from the west coast of America. 



Stylatula gracilis Verriii. 



Bulletin Mas. Comp. ZooL, p. 30, Jan. 1864. 



(?) Virgularia gracilis Gabb, op. cit., iii, p. 120, March, 1864. 



Plate V, figure 2. 

 Stem very slender, cylindrical ; base smooth, swollen and bulbous 

 for a considerable distance relative to the length ; above this a row of 

 transverse processes (or wings) commences on each side, which are at 

 first very narrow and slightly prominent, and leave between them, on 

 both the front and back, a longitudinal naked space ; the lateral pro- 

 cesses gradually become wider and more prominent upward, and the 

 naked bands becoming linear, the one on the back side is soon 

 obliterated by the over-lapping of the lateral wings, while that on the 

 front side finally disappears by the meeting of the processes in front. 

 The lateral transverse processes at first bear very small rudimentary 

 polyps in the form of small papilla^, higher up they become more ele- 

 vated and supported beneath by sharp, white, radiating spines, 10 or 

 12 to each wing, while on the upper edge they bear a single row of 

 15 to 18 moderately large polyps, which in contraction are papillae 

 about equal in length to the spines. In the middle region the wings 

 are close together, about 30 to an inch, arranged alternately upon 



