318 VEERILL, SYNOPSIS OF 



base; margin simple. The outer tentacles are slen- 

 der and moderately long, arranged in a single row around 

 the margin. The inner tentacles are very short and 

 small, forming a circle immediately around the mouth. 

 Tube soft, composed of coral sand. 



Color pale reddish brown on the lower part of the 

 column, white near tlie summit. Outer tentacles whitish, 

 distantly annulated with brown, and with black spots at 

 their inner bases. Inner tentacles white. 



Length of column, in specimen drawn, 1.25 inches; 

 breadth .18 ; length of outer tentacles .44. 



Port Lloyd, Bonin Islands, dredged in ten fathoms, 

 coral mud, in "ten-fathoms hole," October, 1854. Dr. 

 Wm. Stimpson. 



Family, iLYANTHiDiE. 



Ilyanthidm (pars) Gosse, Actiaologia Britanica, p. 227. 

 Ihjantliidm Verrill, Memoirs Boston Soc. Nat. Hist., Vol. I, p. 26. 



Column elongated, tapering or rounded at the base, 

 which is destitute of a distinct disk. Tentacles marginal, 

 usually in a single row. 



Halocampa brevicornis Verrill. 



Eclioardsia brevicornis Stimpsou, Proceedings Pliiladelpliia Acad- 

 emy of Natural Sciences, 1855, p. 376. 



Halocampa brevicornis Verrill, these Proceedings, Vol. IV, p. 151, 



1865. 



Plate 3, figures 2, 2a, 2b. 



Column slender, elongated, vermiform, tapering toward 

 the obtuse base, changeable in form during life, and often 

 exhibiting moving undulating constrictions, as in TIolo- 

 thurians. The twenty internal, radiating lamellae show 

 through the walls as longitudinal lines. Tentacles twenty, 

 short, thick, with a constriction near the tips, which are 

 enlarged and rounded or capitate. 



Body pale brown with a few flake-white spots on the 

 sides. Tentacles dark brown, banded with white at the 

 constriction near the end. 



Length one inch; diameter .18. 



