PLYMOUTH NEMERTEANS. 411 



Geographical distribution : It has only been described from Naples 

 by Burger. 



5. Tubulanus superbus {Kdll). (Burger. Monogr. Taf. I, Figs. 5, 

 7, 9, 11.) 



Locality : On the Eddystone and Eame-Eddystone Grounds ; often 

 met with. One specimen from Asia Shoal. 



This Nemertean seems to be common on all grounds outside the 

 Breakwater at a depth of 45 m. or more. A small number of 

 individuals has been recorded from more shallow water ; both Punnett 

 and Beaumont found it in a sandbank in the river Yealm. Joubin and 

 Biirger give a depth of 30-80 m., which agrees with the ordinary 

 habitat of this worm at Plymouth. The colour of this big Nemertean 

 is a reddish brown. There are four longitudinal white lines and a 

 great number of white rings. The head is broader than the body. 

 Pigment spots are not to be seen. The median dorsal line continues 

 to the tip of the snout, which itself is surrounded by white lines. The 

 cephalic grooves are situated at a short distance behind the first trans- 

 verse dorsal line. Side organs, are present. 



Geographical distribution : Mediterranean coasts, Sweden, Great 

 Britain, French coasts of the Channel. 



6. Tubulanus annulatus {Mont). (Joubin. Les Nemertiens, PI. I, 

 Fig. 2 et 3. Mcintosh. Monogr. Pt. I, PI. 8, Fig. 1.) 



Locality : This Nemertean has been recorded from nearly all dredg- 

 ing grounds inside and outside the Breakwater ; more commonly it is met 

 with near the Mewstone and the Eddystone, at a depth of at least 18 m. 



T. annulatus can easily be distinguished from T. svjjerhis by the 

 absence of a median ventral line, its much smaller size and the bright 

 orange-red colour. The white median dorsal line continues on the 

 head and bifurcates at the tip, enclosing a patch of the same colour as 

 the body. The head is coloured both on its dorsal and ventral side ; 

 the lateral lines originate from the first white belt, which is situated 

 at a short distance behind the cephalic grooves and just behind the 

 mouth. The cephalic grooves reveal exactly the same features as in 

 Carinella aragoi, Joubin. " lis occupent le fond du cou, et sont, non en 

 creux, mais en relief ; ils sont teintes en jaune. Sur la face veutrale, 

 ils commencent audessus de la bouche, de chaque cote, mais sans se 

 rejoindre sur la ligne mediane. lis sont, dans toute cette portion, a 

 peu pres droits. Arrives sur le bord lateral, dans le prolongement 

 des lignes blanches dont il a ete question plus haut, on aper^oit un 

 petit orifice. Au dela, ils passent sur la face dorsale et forment des 

 sinuosites tout a fait caracteristiques. La terminaison des deux sillons 



