from the jS'orth Sea and adjacent parts. 



29; 



the greater part of tlicir Iciij^th, the short tip being filiform. 

 The ventral cirrus in the first four or five feet is also en- 

 larged. At the seventeenth foot the change from the nereid 

 to the heteronereid condition commences with increased 

 vascularity — a dorsal lamella, a ventral, a large inferior 

 setigerous lamella, and a superior subsetigerous lamella all 

 being developed, with fan-like groups of swimming bristles. 

 The dorsal cirrus has a row of [jromineut papiiUe along its 

 lower edge. Sperms extend far forward to the anterior or 

 nereid region. The colour is greenish anteriorly, posteriorly 

 pale or cream-coloured from the sperms, except in those 

 first mentioned, which are pale anteriorly. The tip of the 

 tail is pinkish in colour, which is derived from the vessels 

 underneath. 



"■The females are deep russet-brown and iridescent in 

 February, from the ova which are of a faint salmon-colour. 

 The tips of the palpi are dull brownish orange like the pro- 

 boscis. In September the feet become very vascular, so as 

 to give a deep red aspect to the sides, whilst their tips are 

 ])ale " *. The writer also says that St. Andrews is the only 

 British locality at which pelagic females have been observed. 



Nereis cultrifera, Grube, 184^0. 

 This annelid was obtained at the following four stations 



However, this form, like N. pelagica, is found between 

 tide-marks on both eastern and western shores of Britain, 

 under stones and in tunnels in masses of peat ; on both 

 shores of Ireland ; jMediterranean shores of France {De St. 

 Joseph) ; Canaries {Lanyerhans) ; Black Sea (Bobretsky) ; 

 Japan [Iziikci) ; Formosa [Oshbna) ; Bonin Islands (///ro/o) ; 

 Skagerrak and Kattegat (Heinen) . Tlie ' Challenger ' Report 

 contains no record of this species, and, concerning the 



* I'ide ' .Mnuofri'aih,' vol. ii. part ii. p. 268. 



20* 



