26 PBITNATULID^. 



Sarcoptilus, § Ptilosarcus, Gray, Ann. ^- Mag. Nat. Hist. 1800, v. p. 23. 

 Ptilosai'cus, Vernll, Proc. Essex Inst. 18G5, p. 183. 



" Coral thick, club-shaped. Pinnae numerous, crowded, with thick- 

 ened edges, on which the polypes are arranged in several rows ; each 

 cell surrounded by prominent spine-like spicules. The back of the 

 body, except along a narrow medial space, is covered by prolonged 

 bands of rudimentary polypes, appearing like crowded granulations. 

 The basal portion is thick and bulbous, with two large anterior 

 cavities, one of which extends along the anterior surface, communi- 

 cating with the pinnae, the other along the dorsal portion. The axis 

 is long, fusiform, tapering to very slender points (which are curved, 

 in preserved specimens, into a loop) at each end. Connected with 

 the lower part of the axis are very strong, thickened muscles, which 

 pass obliquely upwards and outwards to the wall-tissue, while higher 

 up, a little above the lowest pinnae, other shorter ones arc attached, 

 which pass obliquely downward to the waU." — Verrill, I. c. 



40. Ptilosarcus Gumeyi. B.M. 

 Oblong, orange. Pinnules smooth, very crowded, closely imbricate, 



with a rather broad, distinctly spinulose margin ; cells crowded. 

 Stem elongate, thick, one-half the entire length, swollen above just 

 under the pinnae. 



Sarcoptilus (Ptilosarcus) Gumeyi, Gray, Ann. ^Maff. Nat. Hist. 1800, 



V. p. 23, t. 3. f. 2. 

 ? Pennatiila tenuis, Gabh, Proc. Cat. Acad. Nat. Set. 1862, ii. p. 166. 

 Ptilosarcus Gm-neyi, VcitHI, Proc. Essex Inst. 1805, iv. p. 182, 



Hah. California, Monterey {Gkirney). 



Basal portion about one-half the whole length, thick, bulbous, 

 very muscular, the surface strongly sulcated in contraction. Pinnae 

 smooth on the sides, broad, rounded, nearly semicircular, with a 

 broad base, the posterior edge extending beyond the base as a 

 rounded lobe ; the edge is thickened and covered by the polypes 

 arranged in four rows. Each cell armed with two short spinules. 

 Along the back are two broad bands of very small papillae or granu- 

 liform rudimentary polypes. 



Length 10 inches, greatest breadth 2 inches ; length of pinnae ? 

 inch, breadth 1| inch ; length of naked base 43- inches, diameter l\ 

 inch, with 52 pinnae on each side. 



Hah. Washiiigton Territory, Puget Sound {Kennerly). 



41. Ptilosarcus sinuosus. B.M. 

 Oblong, Pinniiles much crowded, crumpled, slightly spinulose on 



the margin, Sstem very thick, swollen, as long as the feathered part, 



Sarcoptilus (Ptilosarcus) sinuosus, Grey, Ann. 8; Mag. Nat. Hist. 1860, 

 v. p. 23, t, 3, f, 1, 



Hah. New Guinea (Capt. Sir E. Belcher). 



