148 NATURAL HISTORY OF ARCTIC AMERICA. 



on some of the otlier tubercles. The i'onii (»f the body is more or less 

 cvrnulrica], often two iiiehes or more liijih aii<l one in (liiiiiicter, after 

 ])rcsi'rvation in alcohol. The tubes arc tcnniiial and di\'ci'.u('nt. Colore 

 in life, reddish. 



The very young specimens are low and nearly Hat in contraction, and 

 nearly smooth. 



It is eonnnon on the Grand lianks, where it grows to a large size. It 

 has not been found on the New lOngland coast. 



Lot Xo. 592, head of Cumberland Gulf, attached to roots of kelp. 

 May 19, 1878. Both adult and young. 



Halocynthia echiuata Ycrrill. 



Ascidia cth'uiata LixXE. — Fabkicics, Fauna Griinlaiulica, p. 331. 

 Cynthia echinata Stimp., Invert, of Gnuut Maiian, p. 20, lf:^54. — IJixxEY, in Gould, 

 Invert, of Mass. , p. 18, pi. xxiii,fig. 3'2G0. — Yickrill, Atuer. Jouni. Sci. i.p. 96, 

 1871. 

 Lot No. 590, Cumberland Gulf, May JO, 1878. 



Besides the two species of this genus brought home by the expedi- 

 tion, the following occur on the American coast north of Cape Cod : 

 H. pyrlformh (Ivathke), Southern New England to Greenland; II. vil- 

 losa (Fabr.), perhaps young of the preceding, Labrador to Greenland; 

 II. tuhcrciilnm (Fabr.) = Cynthia carnea (Ag.) Yerrill = C. placenta Pack- 

 ard (young), Cape Cod to Greenland ; 11. indcliella Yenill (as Cynthia)^ 

 Eastport, Me., to Grand Banks; II. partita (Stimj).), Massachusetts 

 Bay to North Carolina. 



POLYZOA. 



Crisia eburuea (L.) Lauiouioux. 



Gulf of Cumberland. One specimen. 



Diastopora patina (Lam.) Smitt. 



Annanactook Harbor, on Lain'ntaria, 7 fathoms, May 10; and on 



Hidoct/ntliid n(sfi<(t, head of Cnndterland Gulf. 'yi;\\ ."», 1878. 



Alcyonidiuni inytili Dalycll. 



Gulf (»f Cumberland, on alga?. Godthaab, GreenlantI, on cara])ax of 

 Ilyas aranciis. 



Gemellaria loricata (Linne) Busk; Suiitf. 



<lniKlliiii(i dnmoua SriMrsox, Invert, of Grand Manan. 



Specimens three inches high, Penny Uarbor, Cumberland Gulf, low- 

 watt'r, October 4, 1877, lots 22G and 238, covered with fry of Crenella 

 fidni : sanu- h>cality. May 28, 1878. 



