710 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxv. 



Family ANTHOPTILID^. 



Polyps free, sessile and without calyces. 



Genus ANTHOPTILUM. 



Polyps in numerous short rows, large. No streak of undeveloped 

 polyps at lower end of rachis. Zooids dorsal, ventral and lateral. 

 Spicules absent, except at end of stalk. 



ANTHOPTILUM GRANDIFLORUM (Verrill). 



Anthoptilum grandiflorum Verrill, Amer. Journ. Sci. and Arts, XXIII, 1882, 

 p. 312. 



Length of longest specimen 80 cm. The sickle-shaped stem is 

 bare of polyps, longitudinally corrugated, and with the end bulb and 

 swelling about equal. 



The polyps are in oblique rows, about 8 to a row, naked, trans- 

 versely corrugated and about 10 mm. long. 



The zooids are very numerous, covering all of the rachis but a 

 narrow ventral groove. 



Color. — In alcohol the color of the polyps is chocolate brown, while 

 the short stem and bare part of the rachis is very light brown, almost 

 white. 



Distribution.— Albatross station 4400, 32° 51' 20'' N., 118° 03' 30" W., 

 500 fathoms; Challenger station 320, off Buenos Ayres, 600 fathoms; 

 Blalce, off the coast of North Carolina, 603-647 fathoms; off Guade- 

 loupe, 730 fathoms. 



This magnificent pennatulid was first described by Verrill, under 

 the name Virgularia grandijiora.'^ Afterwards it was described by 

 Kolliker in his report on the Pennatulids of the Challenger expedition, 

 under the name of AnthoytiluTn thompsoni. 



Later Verrill put it in the genus Anthoptilum of Kolliker, when it 

 became Anthoptilum grandiflorum, (Verrill). 



Family UMBELLULID^E. 



Polyps very large, naked, borne in a cluster at the end of a long 

 slender stem. 



Genus UMBELLULA. 



Being the only genus, its characters are the same as those of the 

 family. 



UMBELLULA MAGNIFLORA Kolliker. 



Umbellula magniflora Kolliker, Report Pennatulida, Challenger Exp., 1880, 

 p. 24. 



A number of specimens apparently belonging to this widely dis- 

 tributed and variable species were dredged by the Fisheries steamer 



«Amer. Journ. Sci. and Arts, March, 1879, p. 230. 



