I9 8 DISCOVERY REPORTS 



Description. This species normally measures between 13-25 mm. in length by 4-6 mm. wide, 

 though exceptionally specimens up to 34 mm. long have been found (for example, Monro, 1930, as 

 Travisiopsis sp.). The body is spindle-shaped and there are twenty-five segments. Between the peri- 

 stomium and the first parapodium is the rectangular caruncle with semi-circular nuchal lobes directed 

 backwards from its posterior border (Text-fig. 136). The lobes are continuous with, and part of, 

 fixed nuchal processes which border the caruncle laterally. Cirri of the peristomium and first two 

 parapodia are foliaceous; thereafter the paired parapodial cirri are rectangular becoming lanceolate 

 posteriorly. A small group of three aciculae project from between the parapodial cirri; these are 

 always variable in position and may begin anywhere between the sixth and thirteenth foot and con- 

 tinue up to the penultimate segment. Anal cirri are long and oval, supported by a central rib. 



Discussion. I have examined the specimens listed below and consider them all to be Travisiopsis 

 levinseni. 



(a) From Monro, 1930, as Sagitella kowalewskii, 'Discovery', Sts. 17, 78, 85, 89, 116, B.M.(N.H.), 

 Reg. no. 1930.10.8.793:805/6:902/3. 



(b) FromMonro, 1930, as Travisiopsis sp.,' Discovery', St. 100, B.M.(N.H.), Reg. no. 1930. 10.8. 1017. 



(c) From Monro, 1936 as Travisiopsis benhami (Types) 'Discovery', Sts. 151, 575, 588 and 

 'William Scoresby', Sts. 35, 549, 55, 716 B.M.(N.H.), Reg. no. 1936.2.8. 1192-1199. 



(d) From Benham, 1927 as Sagitella kowalewskii 'Terra Nova', St. 275, B.M.(N.H.), Reg. no. 

 1928.2.29. 10. 



It will be noted from the synonymy that Benham's 1929, Sagitella kowalezvskii, material is Travisi- 

 opsis lobifera (p. 196). 



In 191 2 Ehlers first described a species which he called Sagittella cornuta (sic), the two type 

 specimens of which are in the B.M.(N.FL). One of these (Reg. no. 1911.11.1.61) is Travisiopsis 

 levinseni, although small for the species (5 mm. long for twenty-five parapodia), and the other 

 (Reg. no. 191 1.1 1. 1. 62) although in a poor state of preservation appears to be Sagitella kowalezvskii 

 Wagner (1872). These specimens must not be confused with Ehlers 1913 material from the Deutsche 

 Sudpolar -Expedition, which is identical with Travisiopsis lanceolata (see below). 



General distribution. T. levinseni has been reported from the Atlantic Ocean in all explored water 

 masses (see pp. 236-237). 



Travisiopsis lanceolata Southern, 19 10 



Type locality. 51 12' N., n° 55' W., 500 fathoms (914-4 m.). 



Travisiopsis lanceolata Southern, 1910, p. 429. 



Travisiopsis lanceolata Southern, 1911, pp. 30-2, pi. 1, figs. 3, 5, 6. 



Sagittella cornuta Ehlers, 1913, pp. 527-9, pi. 39, figs. 8-14 (in part), nee Ehlers 1912. 



Travisiopsis lanceolata Fauvel, 1916, pp. 75-6. 



Travisiopsis lanceolata Fauvel, 1923, p. 229, figs. 86e-g. 



Sagitella cornuta Monro, 1930, p. 90, nee Ehlers, 1912. 



Travisiopsis lanceolata Fauvel, 1932a, p. 20. 



Travisiopsis Lanceolata (sic), Wesenburg-Lund, 1935, p. 13. 



Travisiopsis atlantica Treadwell, 1936, pp. 62-3, figs. 30-3. 



Travisiopsis lanceolata Monro, 1939 a, p. 348. 



Travisiopsis lanceolata Wesenburg-Lund, 1939, pp. 20-1. 



Travisiopsis atlantica Treadwell, 1941, p. 22. 



Travisiopsis lanceolata Stop-Bowitz, 1948, pp. 58-9, figs. 45-6. 



Travisiopsis lanceolata Friedrich, 1950a, pp. 315-19. 



Travisiopsis lanceolata Wesenburg-Lund, 1950a, p. 13. 



Travisiopsis lanceolata Hartman, 1956, p. 277. 



