PLATE VI. 



Pig. 1. Carinina ijrata, n. gen. et sp. The brain as situated in the deeper strata of the integument, 

 seen in horizontal section (cf. woodcut fig. 5, p. 81). Br, Br, the anterior and the posterior 

 hrain-lobes. The inner fibrous core, of these lobes white ; in the anterior lolae traversed by 

 radial fibres, in the posterior one containing the ciliated canal cc, that opens out in fig. 2 into 

 the cephalic groove Crj ; Ngc, the nerve-cells of the brain-lobes (stretching outwards as far as 

 the red tint is ajaplied in the figure); ijl.hr, glandular cells connected with them ; E, the 

 outer layer of the integument ; Gi, the deeper one with gland-cells ; ec and LM, muscular 

 layers ; ba, blood-lacuna between the cesophagus and the muscular body-wall ; Oe, lumen, 

 Ik, epithelium of wsophagus ; Nr, branches of the so-called vagus nerve. 



Figs. 2, 3. Carinina ijrafa, n. gen. et sp. The posterior brain-lobe in following and preceding sections. 

 Lettering as in fig. 1. 



In all these three figures a marked increase of the nuclei in the immediate vicinity of the 

 cephalic groove is particularly distinct. 



Figs. 4-8. Eupoliu giurdii, n. sp. Transverse sections tlii'ough diflerent parts of the brain. Com- 

 pare the figures on PI. V. The fibrous core white, the nerve-cellular coating light red. 



Fig. 4. Section through the lower oonimisbure, just in front of the upper commissure. Pr, proboscis, the 

 innervation of which, proceeding from the two brnin-lobes, is noticed in this section (cf. Ph V. 

 tigs. 5, 9). 



Fig. 5. Section through botli commissures, i.e., a few sections further back. 



Fig. 6. A few sections still ftu'ther back, through the point of origin of the vagus nerve (Nv). Prs, 

 anterior terminal portion of the proboscidian sheath. 



Fig. 7. Section through superior, inferior and posterior lobe ; the latter coated by tlie granular glandular 

 cells gl. hr, and with the ciliated canal «■. 



Fig. 8. In the superior lobe the fibrous core has again subdivided, giving off an uppeiinost stem, the 

 centre of the outwardly visible superior g)TUS {cf. PI. V. figs. 5, 7). 



Fig. 9. EiipnJia ijiardii, u. sp. Part of a transverse section through the oesophageal region. 

 rm and Ilin, the circular and inner longitudinal muscular layer (/8 and a of PI. XL fig. 12); 

 PI, the nerve plexus just outside the former ; N.-<t, the lateral nerve-stem in this plexus ; 

 Pv.s, the proboscidian sheath with very thin walls ; do, the dorsal blood-vessel, situated, as 

 are a dozen of circumffsophageal lacunar spaces (that communicate with each other), in the 

 gelatinous tissue between body-wall and intestinal wall. Ov, the lumen of the oesophagus ; 

 /(,', its ciliated ejjithelium ; oe.w, its longitudinal and circular musculature ; nep, neplu'idian 

 tubes. The thin longitudinal nerve-stem above the proboscidian sheath has been omitted 

 in this figure. 



Fig. 10. Eupolui Ijiardii, u. sp. A transverse section of the dorso-median portion of the body-wall 

 at the furthest end of the body. em, Urn, Prs, as in fig. 9. olm, outer longitudinal 

 muscular layer (y, PL XL); Bd, the much folded primary basement layer ; ;/, the deeper 

 glandular layer of the integument ; ef, the longitudinal and circular fibres of the same ; 

 E, the outer layer of the integument {cf. PI. VII. fig. 5 and PL X. fig. 6) ; iw, dorsal 

 blood-vessel. 



Fig. 11. Eiqiolia jianlii, n. sp. Transverse section through the posterior part of the proboscis, 

 with internal epithelium {Pre), longitudinal muscle-fibres {Lm), and external flattened epi- 

 thelium (e). 



