THE NEMERTINES OF MILLPORT AND ITS VICINITY. 29 
(11) Oupemans, A. C., “The Circulatory and Nephridial Apparatus of the Nemertea,” Quart. Journ. 
Microsc, Science, vol. xxv., Suppl., 1885. 
(12) Oxver, M., “Sur quelques nouvelles espéces des Némertes de Roscoff,” Arch. Zool. Expér, (4), vi. 
(Notes et Revue), 1907. 
(13) Punyert, R. C., “ Addenda and Corrigenda to the Nemertini,” in Part IV. of A Treatise on Zoology, 
ed. Lankester, London, 1901. 
EXPLANATION OF FIGURES. 
(Figs. 3, 4, 5 drawn from sections by Zeiss’s Abbé’s drawing apparatus. ) 
Fic. 1. Head of Tubulanus annulatus from the dorsal surface, to show appearance of grooves and cerebral 
organs ; pigmented areas indicated. 
c., cerebral organ; f., frontal pigmented area (Stirnfeld) ; 4., cephalic groove. 
Fic. 2. Part of the left lateral margin of the head of another specimen of the above ; the anterior wall 
of the cephalic groove, and the circular depressed area (cerebral organ) are lighter in tint than the surround- 
ing parts. 
c., cerebral organ ; g., cephalic groove. 
Fic. 3. Transverse section of head of Tubulanus annulatus, through the left cerebral organ. x 55. 
c., cerebral organ ; b7., brain. 
Fic. 4. Longitudinal section of head of Tubulanus annulatus. x 64. 
comm., commissure between the two halves of the brain; g/., head-gland; m., mouth; pr., pro- 
boscis; pr. cav., rhynchocelom; x., cushion of cells described in text; y., the smaller 
ventral cushion. 
Fie. 5. The dorsal cushion of cells in the proboscis of Tubulanus annulatus, more highly magnified. 
6. Stylet of Hmplectonema gracile. 
7. Usual form of stylet of Amphiporus lactifloreus. 
Fig. 8. Exceptional form of stylet of Amphiporus lactifloreus. 
9. Dorsal surface of head of Amphiporus pulcher. 
a.d.g., anterior cephalic groove, dorsal; p.d.g., posterior cephalic groove, dorsal; sec., secondary 
groove. 
Fic. 10. Ventral surface of head of Amphiporus pulcher. 
a.v.g., anterior cephalic groove, ventral; d., dimple in the course of the above; p.v.g., posterior 
cephalic groove, ventral ; sec., secondary groove. 
Fie. 11. Stylet of Amphiporus pulcher. 
Fic. 12. Amphiporus elongatus, to show the general form. x 1}. 
a,, anterior end ; p., posterior end. 
Fie, 13. Head of Amphiporus elongatus, as a transparent object. 
a.e., anterior eyes; a.g., anterior cephalic groove; 67., brain; ¢., cerebral organ; p.e., posterior 
eyes ; p.g., posterior cephalic groove. 
Fic. 14. Stylet of Amphiporus elongatus. 
Fie. 15. Stylet of Prostoma candidum. 
Fic. 16. Stylet of Oerstedia dorsalis. 
Fie. 17. Head of Micrura scotica, from the dorsal surface; the position of the mouth on the ventral 
surface is, however, also indicated. 3 
c.g., extent of cephalic groove; ¢., eyes; g., reddish area due to brain; m., relative position of 
mouth ; «., line indicating junction of the pale margin with the pigmented area of the head. 
Fic. 18. Posterior end of Micrura scotica, to show relative size of tail. 
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