NO. 1624. DESCRIPTIONS OF HA WAIIAN ALCYONARIA— NUTTING. 567 



Calyces very small, not more than 1^ mm. high. Polyps retractile, 

 without spicules. 



Spicules needle-like, abundant, disposed longitudinally, or nearly 

 so, throughout the colony. 



Zooids large, arranged on each side of a bare mid-ventral band. 

 They are very sparsely distributed on lateral and dorsal surfaces. 

 Each zooid is surrounded by a tuft of converging spicules. 



Color. — Deep rose red on rachis and calyces. Stem light yellow. 

 The polyps were probably bright yellow in life, but are a yellowish 

 white in alcohol. 



Type. — Northeast approach to channel between the islands of Maui 

 and Molokai: Station 4096, 272-286 fathoms (Cat. No. 22585, 

 U.S.N.M.) 



Named for Prof. E. P. Wright. 



Genus TRICHOPTILUM Kolliker. 



Polyps alternately arranged ; margins of calyces with eight spines ; 

 spicules numerous in calyces and tentacles ; zooids dorsal. 



TRICHOPTILUM ATTENUATUM, new species. 



Plate XLII, fig. 8. 



Colony exceedingly long and slender. Entire length 325 mm. ; stem, 

 from base to first rudimentary polyps, 112 mm. There is a slightly 

 swollen end bulb, and, a less pronounced gentle swelling about 37 mm. 

 above it. Average diameter of stem about \\ mm. The stem is quad- 

 rate in section. 



Polyps arranged somewhat irregularly in two dorso-lateral rows, 

 sometimes opposite and sometimes alternate, large and small indi- 

 viduals being interspersed. 



The individual polyps are large and conspicuous, with exceedingly 

 elongated calyces which attain a length of 6 mm. and a diameter of 

 1^ mm. The basal part of the body is sharply differentiated from 

 the distal, the former being transversely wrinkled and having the 

 needle-like spicules crisscrossed, having a length of about 3^ mm., 

 afid appearing somewhat like a short branch with which the second 

 part or true calyx is continuous. This second part is somewhat 

 swollen in the middle and bears eight narrow longitudinal bands of 

 si^icules continuing upward above the margin into eight sharp teeth. 

 The tentacles are without spicules, and are arranged in a cylindrical 

 vertical bundle in contraction. 



Spicules, needle-like, abundant in rachis and calyces. 



Zooids in short rows of two or three on dorsal surface, running 

 obliquely inward from below the bases of the calyces. 



Color. — The stem and rachis is white, polyps umber-brown. 



