STREBLOSOMA BAIRDI. 181 



Streblosoma, Sars, is the only tenable name for the genus. In this he was followed 

 by Treadwell. 1 



1. Streblosoma bairdi, Malmgren, 1865. Plate CXXVI, figs. 7— 7 (/—bristle and hook. 



Specific Characters.— Cephalic lobe as in Thelepus. Three pairs of simple branchiae 

 Body 2-J- inches or more in length, with about thirty-two flattened and lobate setigerous 

 processes, the region behind having only uncinigerous processes. The flattened rows 

 of bristles are twisted like a screw propeller. Nephridia in the third, fourth, fifth, 

 sixth and seventh segments. Bristles about ninety pairs, very long, striated, gently 

 tapered beyond the skin, and with narrow wings. The shorter forms are more slender 

 and alternate with the others ; though on the dorsal edge long bristles and on the 

 ventral edge slender bristles occur. Hooks distinguished by having two distinct prongs 

 above the great fang, and the stud on the anterior outline leaves it at an obtuse 

 angle, the prow being produced below it. Tube rather thick, of grey mud and sand. 

 Malmgren named it after the genial and distinguished Dr. W. Baird of the British Museum. 



Synonyms. 

 1865. Grymsea Bairdi, Malmgren. Nord. Hafs. -Annul., p. 388, Tab. xix, fig. 69. 

 1867. „ „ idem. Annul. Poly ch., p. 219. 



1869. „ „ Mcintosh. Trans. Roy. Soc. Edin., vol. xxv, p. 424. 



1871. Streblosoma cochleatum, Gr. 0. Sars. Yid. Selsk. Skrift. Kristiania, p. 414. 

 1874. „ „ Malm. Annul. Goteb., p. 99. 



1876. Neottis antarctica, Mcintosh. Ann. Nat. Hist., ser. 4, vol. xvii, p. 321. 



„ „ „ idem. Transit. Yenus Exped., p. 4, pi. xv, figs. 14 and 15. 



1877. Thelepus Mclntoshii, Grube. Monatsber. Konigl. Akad. Wiss. Berlin, p. 544. 

 1879. Terebella Bairdii, Tauber. Annul. Danica, p. 134. 



„ „ cochleatum, idem. Ibid., p. 133. 



1883. Grymsea Bairdi, Levinsen. Yidensk. Meddel., p. 177. 



„ Streblosoma cochleatum, idem. Ibid., p. 177. 



1885. Neottis antarctica, Mcintosh. Rep. " Challenger," vol. xii, p. 472, pi. lii, fig. 1. 



1894. Streblosoma cochleatum, Bidenkap. Christiania Yidenskab. -Selsk. Forhandlinger, No. 10, p. 131. 



1896. „ „ Appellof. Bergens Museum, Aarbog, No. 13 (1894—96), p. 12. 



1897. Grymsea Bairdi and Streblosoma cochleatum, Michaelsen. Polych. deutsch. Meere, p. 174. 



1901. Thelepus spectabilis, Pratt. Mem. Manchester Lit. and Philos. Soc, vol. xlv, No. 13, p. 14. 

 „ ? Grymsea spiralis, Whiteaves. Mar. Invert. E. Canada, p. 73. 



1902. Thelepus antarcticus, Willey. " Southern Cross," p. 278. 



1906. „ thoracicus, Gravier. Nouv. Arch. Mus. dTIist. Nat., ser. 4, t. viii, p. 218, pi. iv, figs. 



228 and 229. 

 1912. Grymsea Bairdi, Wollebask. Yid. Selsk. Skrift. Christiania, No. 18, p. 88, pi. xx, figs. 8 and 



9, pi. xxix, fig. 2. 

 „ „ ,, Meyer. Inaug. Dissert. Kiel, p. 49. 



1914. Thelepus spectabilis and thoracicus, Augener. Fauna S.W. Australia, Bd. v, Jena p. 98. 



1915. Grymsea Bairdi, Mcintosh. Ann. Nat. Hist., ser. 8, vol. xv, p. 31. 

 „ Thelepus triserialis, idem. Ibid., ser. 8, vol. xv, p. 29. 



i i 



Bull. Amer. Mus. Nat. Hist.,' vol. xxx, p. 11, 1911. 



