A. E. Verrill — Marine Nemerteans of Ne/w England. 455 



Figure 2. — Cerebrahdus Leldyi V. Natural size; la, the same, ventral view of head. 



New Haven, Conn. 

 Figure 3. — Micruru rubra, sp. nov. Peculiar specimen, probably repaiiing mutilation 



of tail. Side view; x IJ; 3a, the same, ventral view of head. 

 Figure 4. — Ilicrura do7'salis, sp. nov. Dorsal view; x 1|; 4a, the same, ventral view 



of head, more enlarged. Type specimen. Eastport, Me. 

 Figures. — Lineus arenicola V. Dorsal view of the original specimen; x 1^; 5a, 



the same, ventral view of head. 

 Figure 6. — Lineus viridis. Red variety, dorsal view; x H; 6a, the same, side 



view of head ; 6&, the same, dorsal view of a very young specimen having but 



four eyes ; 6c, the same, a cluster of eggs, f natural size ; 6c?, the same, a young 



specimen Just hatched, much enlarged. 

 Figure 7. — Lineus socialis. Young, ventral view, natural size ; 7a, the same, dorsal 



view of the head and anterior part of the body, enlarged. August 12, 1880. 

 Figures. — Lineus bicolor. Dorsal view; x 5; 8a, 8b, the same, side and ventral 



views of head, more enlarged. Wood's Hoil, Mass., July 14, 1875. 

 Figures 9, 9a. — Micrura rubra, sp. nov. Front and side views of the head ; x 3. 



Eastport, Me. 

 Figures 10 and 10a. — Lineus sanguineus. Dorsal and ventral views of the head and 



anterior part of the body ; x 3. 

 Figure 11. — Lineup, sp. (?) Young, dorsal view, much enlarged; 11a, another view 



of the front part of the same specimen. Vineyard Sound, among compound 



ascidians, 1881. 

 Figures 12, 12a. — Empledoneitia giganteum Y. Dorsal and ventral views of the head 



of the original type-specimen ; x 2. 

 Figures 1, 6, 7, 11 are by J. H. Emerton ; 8 to 8& are by J. H. Blake; 2 by A. H. 



Verrill ; the rest are by the author. All are from living specimens. 



Plate XXXIX. 



Figures 1, 2, 3, 4. — Pilidiuni, sp. uudetermined. Different views; x 30. Wood's 

 Holl, Mass., at surface, in day time, August 18, 1881. J. H. Emerton, from 

 nature. 



Figure 5. — The same; x 75; a, apical cirrus ; &, apical plate; //, nerve ; w, head of 

 developing nemertean with two eyes. J. H. Emerton, from nature. 



Figure 6. — Piliditim, undetermined, sp. with golden yellow spots around the margins ; 

 taken with the preceding ; a, cluster of apical cirri ; b, apical plate ; b', nerve ; 

 c, c', anterior and posterior lobes; d, d', lateral lobes ; t, oesophagus; /^ /, de- 

 veloping nemertean ; x 75. J. H. Emerton, from nature. 



Figure 7. — Amphiporus lactifloreus. End of protruded proboscis, much enlarged; 

 s, central stylet ; s', lateral stylets ; 2>, posterior region of proboscis ; d, bulbous 

 region ; /, saccular organ ; 7a, one of the lateral stylet-sacs, more enlarged. 

 After Mcintosh. 



Figure 8. — Amphiporus ochraceus V. Extruded proboscis, enlarged ; a, anterior re- 

 gion ; s, middle region with central and lateral stylets ;' p, posterior region. 

 Camera-lucida drawing by the author. 



Figure 9. — Amphiporus bioculatus (?). Middle portion of the proboscis, compressed 

 under the microscope and much enlarged ; p, commencement of the posterior 

 region; r, muscular bulb; s, central stylet; f, one of the lateral stylet-sacs. 

 Camera-lucida drawing by the author. 



