452 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



the inrolling of the horns progressing to form spirals having four, 

 five, or more turns. In some cases these spirals remain flat, but in 

 others they take on a cone shape, the cones in some projecting prom- 

 inently. Frequently secondary cones are formed on various parts 

 of the tubercle, in one instance as many as seven of different sizes 

 being present. The range of variation and complication is here 

 somewhat similar to but greater than that found in //. johnsoni 



Hitter, 1909. 



"Albatross" collections. 



Station 2842, lat. 54° 15' N.; long. 166° 03' W., off Akutan Island, 

 Alaska, 72 fathoms, p., July 23, 1888, 1 specimen. 



Station 2851, lat. 54° 55' N.; long. 159° 52' W., Shumagins, 35 

 fathoms, gy. s. brk. sh., August 4, 1888, 3 specimens. 



Station 3213, lat. 54° 10' N.; long. 162° 57' 30" W., southwest 

 of Sannak Islands, 41 fathoms, bk. s., May 21, 1890, 2 specimens. 



Station 3504, lat. 56° 57' N.; long. 169° 27' W., Bering Sea, 

 34 fathoms, fne. gy. s. bk. s., July 28, 1893, 3 specimens. 



Station 3505, lat. 57° 09' N.; long. 168° 17' W., Bering Sea, 

 44 fathoms, fne. gv. s., July 28, 1893, 15 specimens. 



Station 3512, lat. 57° 49' 30" N.; long. 169° 27' W., Bering Sea, 

 38 fathoms, fne. s. gn. m., August 1, 1893, 1 specimen. 



Station 3513, lat. 58° 27' N.; long. 169° 01' W., Bering Sea, 35 

 fathoms, fne. s. gn. m., August 1, 1893, 2 specimens. 



Unalaska, June 16, 1890, 2 specimens. 



Kadiak, Alaska, August 14, 1888, 1 specimen. 



Loring, Alaska, April 29, 1903, 5 specimens, small. 



OTHER THAN "AlhatrOSS" COLLECTIONS. 



Chugachik, Alaska, 20-60 fathoms, W. H. Dall, June 30, 1880, 1 

 specimen. 



Chiniak Bay, Kodiak, Alaska, 16-25 fathoms, W. H. Dall, July 12, 

 1880, 1 specimen. 



Unalaska, Alaska, L. M. Turner, October, 1878, 1 specimen. 



Kasaan Bay, Prince of Wales Island, Alaska, T. H. Streets, 1 speci- 

 men. 



Ward Cove, Revilla Gigedo Island, Alaska, T. H. Streets, 2 speci- 

 mens. 



St. Paul Island, Pribilof Islands, M. C. Marsh, Bureau of Fish- 

 eries, March, 1912, 1 specimen. 



HALOCYNTHIA ECHINATA (Linnaeus). 



Ascidia echinata Linn^us, 1767, vol. 1, part 2, p. 1087, No. 6. 

 Cynthia echinata Stimpson, 1854, p. 20. 

 Halocynthia echinata Verrill, 1879, p. 148. 

 Halocynthia arcllca Hartmeyer, 1903, p. 190, pi. 11, figs. 10, 11. 

 Halocynthia arctica Redikorzew, 1907, p. 130. 

 Pyura echinata Hartmeyer, 1910, p. 231, figs. 1-12. 

 Boltenia echinata Huntsman, 1911, p. 133. 



Fyura echinata Van Name, 1912, p. 523, text fig. 23, pi. 54, figs. 61-65; pi. 70, 

 fiffs. 143, 144. 



