430 G. WYNHOFF. 



Plymouth. I got it twice from Queen's Grounds, once from the 

 Cattewater, on each occasion a few specimens. 



Geographical distribution : Sweden, the Atlantic coasts of England, 

 France and Madeira, the Mediterranean and the Pontic coasts. 



2. Prostoma coronatum (Quatr.). (Burger. Monogr. T. 3, Figs. 

 2, 8.) 



Locality : Fairly common in all dredgings from the Sound ; Mewstone 

 and Cattewater ; once between tidemarks at Paim Bay. 



To this species must be referred the greater part of the nemertines 

 described by Eiches as Tetrastemma melanocephalum. P. coronatum 

 never attains the size of P. melanocephalum, its average length being 

 12 mm. with a breadth of O-o-l mm. (even in sexually mature 

 specimens). The shape of the hmicn pigment on the head, as indicated 

 in Burger's figure, is quite characteristic. It is the same as in P. 

 diadema, Jouhin (Les Nemertiens, PI. Ill, Fig. 66). 



Geographical distribution : The Atlantic coasts of Norway and France 

 and the Mediterranean are known as its habitat. 



3. Prostoma vermiculus (Quatr.). (Joubin. Les Nemertiens, 

 PI. Ill, Fig. 64.) 



Locality : Eather common in dredgings from Asia Shoal ; from some 

 other dredging grounds in the Sound, near the Mewstone and Mew- 

 stone Ledge, and once between tidemarks at Eum Bay. 



Joubin's figure gives by far the best idea of this species. However, 

 the individual reproduced is a small one, as ripe specimens of vermiculus 

 are very large in comparison with P. coronatum. They have the same 

 size as P. melanocephalum and can be distinguished readily from both 

 coronatum and melanoce2')halum by the shape and the colour of the pig- 

 ment spots, constituting a pair of longitudinal brown stripes, connecting 

 the eyes. 



Geographical distribution : P. vermiculus has been recorded from 

 several spots on the English coasts, and is distributed all over the 

 Northern part of the Atlantic, from North America to Norway and 

 Madeira and the Mediterranean. 



4. Prostoma peltatum {Burger). (Burger. Monogr. Taf. Ill, Fig. 6.) 

 Locality : Two specimens from the Bridge. 



This species is characterised by the presence of two pairs of eyes, of 

 which the anterior pair is at least twice as large as the posterior. A 

 transverse band of brown pigment is situated between the eyes ; it 

 does not hide them. Colour deer-brown. Both specimens were $ . 

 Length 40-50 mm., breadth 2 mm. 



Geographical distribution : Naples. 



