29G Mr. J. W. PryJe oji Annelida Pohjchceta 



German Iiivestigatiou Ship ' Poseidon/ Heinen adds " Im 

 ' Poseidon' Material niclit vertreten " *. 



The head agrees with the aceount in the Monograph, 

 It differs from that of N. pelagica by having a distinct 

 median furrow, while the dorsal of tlie second pair of tenta- 

 cnhir cirri is almost twice as long as that of the anterior pair. 

 The jn'oboscis is strong and stout and resembles that of 

 N. 'pelogica,h\\i^\^'Gv^ in the basal region, however, which 

 bears s<?veral large paragnathi which are bluntly conical and 

 black in colour. The jaws are large and powerful, and each 

 has five teeth. Tl)« right jaw passes over the left, but, 

 according to the Monograph, -the opposite condition may 

 also be found. 



The body is more elongated than that of N. 2)ela(jica and 

 tapers towards the tail, Avhere it ends in two long, slender, 

 pale cirri. The peristomium is broader than any of the 

 other segments, but it is only about two-thirds the breadth 

 of a N. pelagica of corresponding size. The feet are typical 

 of the species, but the colour has changed to a duskier hue 

 owing to the preservation. 



The epitokous specimen has nineteen feet in the uereid 

 or anterior region and forty-nine feet in the posterior or 

 heteronereid region. The eyes are large, convex in shape, 

 and are intensely black in colour. The first seven feet 

 resemble the condition found in N. pelagica, only the ventral 

 cirri have a slighter enlargement, which, according to 

 the Monograph, ceases sooner. The swimming-bristles 

 and swimming-feet are characteristic. The heteronereid 

 example in this collection was found on the 22nd day of 

 November, but on the shores near Cherbourg, M. Fauvel 

 obtained several in April and May; while Prof. Iziika observed 

 a large swarm on the 1st day of September, 1896, in Misaki 

 harbour. 



The gut was empty, but the animal usually feeds on very 

 fine branching algfe. In Guernsey the fishermen use this 

 animal for bait, and dig for them with pointed instruments 

 resembling spears f- 



JSereis fucata, De Blainville, 1825. 



The following are the stations at which this species was 

 procured : — 



* Vide ' Die Nephthydeen unci Lycorideen der Xord uud Ost-See ' 

 (Ileineii). 

 t J'ide ' Monograpli,' vol. ii. ])art ii. p. 289, fig. 70. 



