SYSTEMATIC ACCOUNT l8t 



Description. This is a large species which may measure up to 60 mm. long in the adult, but it 

 appears to be very difficult to catch and preserve in good condition, so that for the majority of 

 specimens it is not possible to give accurate measurements or parapodial counts. Among the largest 

 specimens is one from St. 1555, measuring 49 mm. in length by 11 mm. wide for twenty-five para- 

 podia with another four rudimentary feet on the broken tail. At St. 2646 one of the smaller specimens 

 occurred, measuring 7-5 mm. long by 3 mm. wide for nineteen parapodia. There is a deep indentation 

 in the middle of the anterior border of the antennae, and two prominent eyes are set close together 

 on the prostomium. The first pair of chaetigers is missing; the second pair is very long and in the 

 smaller specimens may be four or five times as long as the body, but in the adult it is normally only 

 twice the body length. Parapodial pinnules are reduced to a fringe bordering the feet. Apical hyaline 

 glands normally appear first on the neuropodial pinnules of the third parapodia and on the notopodia 

 of the eighth feet, and on all subsequent rami to the end of the body. They are frequently indistinct 

 and in the smaller specimens are difficult to see. Prominent chromophil glands appear first in the 

 ventral part of the fourth neuropodial pinnule in the adult, and are present on all parapodia up to the 

 pygidium. In the small specimens, the chromophil gland may not appear until the tenth foot or later. 

 The notopodial hyaline gland seems to vary a great deal in position, Rosa (19086) reporting it from the 

 third, Fauvel (1923) from the eighth or ninth, Wesenburg-Lund (1935) from the fifth and Stop-Bowitz 

 (1948) from the fourth pair of parapodia: in the specimens examined here it does not vary to this 

 extent, but in small specimens it is frequently so indistinct that it cannot be seen on some anterior feet. 

 A prominent tail is present with rudimentary parapodia, but it is almost always incomplete. 



Discussion. As noted on page 175 the T. carpenteri described by Mcintosh (1925) from off South 

 Africa is almost certainly T. nisseni. The relationship of T. nisseni to other species is discussed 

 on page 182. 



General distribution. T. nisseni is widely reported from the Atlantic Ocean in which its southern 

 distribution is limited by the Sub-Tropical Convergence (see pp. 246-248). 



Tomopteris krampi Wesenburg-Lund, 1936 

 Type locality. North Atlantic Ocean, 36 19' N., 26 50' W. 



Tomopteris (Tomopteris) cavallii Monro, 1930, p. 87 (in part ?). 

 Tomopteris Krampi Wesenburg-Lund, 1936, pp. 8-1 1, figs. 1-3. 

 Tomopteris (Tomopteris) Krampi Stop-Bowitz, 1948, pp. 48-9, fig. 34. 



Description. The measurements of all specimens of this species examined in the present survey are 

 listed in Table 6, except Monro's 1930 material from ' Discovery ', St. 89, which are on p. 173. 



Specimens indicated by an asterisk have a tail and this is included in the measurement of length. 

 The anterior border of the first pair of chaetigers is entire with a slight fold in the central portion; 

 there is a pair of eyes on the prostomium. The first pair of chaetigers is present and the second pair 



