532 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
depths of 100 fathoms, though more numerous in shallow water (4 to 
50 fathoms). 
Pyura aurantium (Pallas). 
PI. 55, fig. 67; PI. 56, fig. 71-74; PL 67, fig. 134; text-fig. 25. 
1787. Ascidia aurantium Pallas, Nova Acta Acad. Petrop., vol. 2, p. 240, 
pi. 7, fig. 38. 
1806. Ascidin pyriformis Rathke, Zool. Danica, vol. 4, p. 41, pi. 156. 
1854. Cynthia pyriformis Stimpson, Smithsonian Contr., vol. 6, p. 20. 
1860. Cynthia pyriforynis Smithsonian Check-list, p. 1. 
1863. Cynthia pyriformis Packard, Canadian Naturalist and Geologist, 
vol. 8, p. 412. 
1867. Cynthia pyriformis Packard, Mem. Boston Soc. Nat. Hist., vol. 1, 
p. 277. 
1870. Cynthia pyriformis Binney, Gould's Invertebrata of Massachusetts, 
ed. 2, p. 17, pi. 23, figs. 320, 321. 
1870. Cynthia pyriformis Dall, Proc. Boston Soc. Nat. Hist., vol. 13, p. 255. 
1871. Cynthia pyriformis Verrill, Bull. Essex Inst., vol. 3, pp. 3, 5. 
1871. Cynthia pyriformis Verrill, Amer. Journ. Sci., ser. 3, vol. 1, p. 97, fig. 10. 
1872. Cynthia pyriformis Dall, Amer. Journ. Conchology, vol. 7, p. 157. 
1874. Cynthia pyriformis Verrill, Proc. Amer. Assoc. Adv. Sci., vol. 22, 
pp. 359, 363. 
1874. Cynthia pyriformis Whiteaves, Amer. Journ. Sci., ser. 3, vol. 7, p. 5. 
1874. Cynthia pyriformis Verrill, Amer. Journ. Sci., ser. 3, vol. 7, p. 43. 
1879. Halocynthia pyriformis + H. villosa Verrill, Bull. U. S. Nat. Mus., 
no. 15, p. 148. 
1879. Halocynthia pyriformis Verrill, Proc. U. S. Nat. Mus., vol. 2, p. 197. 
1879. Halocynthia pyriformis Verrill and Rathbun, Proc. U. S. Nat. Mus., 
vol. 2, p. 231. 
1880. Cynthia papillosa Traustedt, Vidensk. Meddel. Naturhist. For. Kjoben- 
havn, p. 407. 
1885. Cynthia pyriformis Verrill, Rept. U. S. Comm. Fish and Fisheries for 
1883, p. 529. 
1886. Halocynthia pyriformis Whiteaves, Catalogue Colonial and Indian 
Exhibition, p. 39. 
1889. Halocynthia pyriformis McDonald, Rept. U. S. Comm. Fish and 
Fisheries for 1886, p. 858. 
1900. Cynthia pyriformis Metcalf, Zool. Jahrbiicher, Anat., vol. 13, p. 510. 
1901. Halocynthia pyriformis Whiteaves, Geol. Survey Canada, pub. no. 722, 
p. 268. 
1901. Cynthia (Halocynthia) pyriformis Kingsley, Proc. Portland Soc. Nat. 
Hist., vol. 2, p. 183. 
1903. Halocynthia aurantium Hartmeyer, in Romer and Schaudinn, Fauna 
Arctica, vol. 3, p. 195. 
1906. Halocynthia aurantium Redikorzew, Trav. Soc. Nat. St. Petersbourg, 
vol. 37, pt. 1, pp. 154, 308, 310. 
