SYSTEMATIC ACCOUNT 179 



the parapodial pinnules are not continued close to the body wall and are similar in shape to those of 

 T. planktonis; the chromophil gland is ventral and the hyaline gland indistinct. In neither of the 

 specimens is there a first pair of chaetigers; I consider both of them to be T. planktonis. On re- 

 examination of the four specimens reported by Monro (1936) from 'Discovery', St. 714 as T. plank- 

 tonis, I find that three of them (B.M.(N.H.) Reg. no. 1936.2.8. 1010-1012) are T. ligulata. 



General distribution. T. ligulata has been frequently recorded from the Atlantic where it has its 

 southern limit of distribution at the Sub-Tropical Convergence (see p. 248). 



Tomopteris elegans Chun, 1887 



Type locality. Canary Islands, 500-1300 m. 



Tomopteris elegans Chun, 1887, pp. 18-19, pi. 3, figs. 4-9. 



Tomopteris Kefersteinii Apstein, 1900, p. 41, pi. 11, fig. 15 {nee T. Kefersteinii Greeff). 



Tomopteris {Tomopteris) elegans Rosa, 19086, pp. 294-7, pi. 12, fig. 16. 



Tomopteris elegans Ehlers, 1917, p. 227. 



Tomopteris {Tomopteris) elegans Malaquin and Carin, 1922, pp. 37-8, pi. 5, figs. 1-6, pi. 8, figs. 3-5, pi. 9, 



figs. 1-3. 

 Tomopteris {Tomopteris) elegans Fauvel, 1923, p. 223, figs. 846, c. 

 Tomopteris elegans Benham, 1929, pp. 196-7, pi. 2, figs. 24-6. 

 Tomopteris {Tomopteris) elegans Terio, 1947, pp. 353-4, fig. 18. 

 Tomopteris {Tomopteris) elegans Stop-Bowitz, 1948, pp. 46-8, fig. 23 a ~°- 



Description. Twenty-six specimens of this species have been examined, and in Table 5 measure- 

 ments of nine of them are listed as typical of their size range. 



Table 5. Measurements of Tomopteris elegans 



The anterior border of the antennae has a pronounced central indentation (Text-fig. 1 1 a). A pair 

 of eyes is present, frequently indistinct in small specimens. The first pair of chaetigers is always 

 present (Text-fig. 11 a) and the second pair reach to two-thirds the length of the body. Pigmented 

 hyaline glands are present on the notopodial pinnules of the third and fourth feet only (Text-fig. lib), 

 elsewhere they are absent. Chromophil glands appear from the fourth neuropodial pinnule on all 

 feet up to the end of the body; they are ventral in position just below the apex of the parapodial 

 trunk (Text-fig. 1 1 c). There is no tail. 



Discussion. It is possible that in some very young specimens of T. elegans the hyaline glands are 

 not pigmented; such specimens could have been confused with T. planktonis and have given rise 

 to the idea that T. planktonis has a first pair of chaetigers. 



General distribution. T. elegans is widely distributed in the warmer waters of all seas: it has 

 its southern limit of distribution in the Atlantic Ocean at the Sub-Tropical Convergence (see 

 pp. 250-252). 



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