BRITISH NEMERTEANS, AND SOME NEW BRITISH ANNELIDS. 433 



Fig. 16. Hook of Rhodine loveni, Mgrn. x 700 diameters. 



17. Hook of a species allied to Ereutho smitti, Mgrn. x 900 diameters. 



18 1 



, o > Hooks of a form closely resembling Polycirrus aurantiacus, Grube. x 900 diameters. 



20. Hook of Pista cristata, Muller. x 700 diameters. 



21. Bristles of Syllis tubifex (?), Gosse ; a, a, from middle of body; b, spine; c, bristle from 

 the third foot. x 280 diameters. 



Plate XVI. 



1. Ventral bristle of Gastalia punctata, Mull. x 700 diameters. 



2. Bristle of Psamathe fusca, Johnst. x 700 diameters. 



3. Jointed hook from the anterior segments of HycMnoeeia sieula, Quatref. x 700 diameters. 

 3 b. Simple hook from the posterior region of the same. x 700 diameters. 



3 c. Bristle of the foregoing species. x 700 diameters. 



4. Hook of Siphonostoma buskii, n. sp. x 350 diameters. 



4 a. Bristle from the frontal series of the same species. x 90 diameters. 



5. Forked bristle of Eumenia jeffreysii, n. sp. x 700 diameters. 



6. Hook from the bristle-bearing segments of Tricliobranclms glacialis, Mgrn. x 90 diameters. 



7. The same. x 700 diameters. 

 7 a. Hooks from the posterior segments of the same annelid. x 700 diameters. 



8. Bristle of T. glacialis. x 350 diameters. 



9. Bristle of Sphmrosyllis from the Minch. x 700 diameters. 



10. Bristle of Pionosyllis malmgreni, n. sp. x 700 diameters. 



11. Foot of Staurocephaliis kefersteini, n. sp. ; /, superior cirrus; g, inferior cirrus. x 210 

 diameters. 



11 a. \ 



lib. (The varieties of the bristles in the same species, as described in the text. x 700 



lie. T diameters. 



11 d.) 



12. Hook of Clymene ebierms, Aud. & Ed. x 350 diameters. 



13. Hook of Praxilla (artica ? Mgrn). x 350 diameters. 



14. Bristle of Syllis krohnii, Ehlers. x 700 diameters. 



a- I B r i s ties of Syllis cornuta, Rathke. x 700 diameters. 

 15 b. J J ' 



a ' \ Hooks of Sabellides sexcirrata Sars. x 700 diameters, 

 loo.) 



17. Foot of Notocirrus scoticus, n. sp. ; a, branchial lobe; b, spine; c, bristles. x 350 



diameters. 



VOL. XXV. PAKT II. 5 S 



