EXPLANATION OF PLATE XIV.—continued. 
Fie. 5.—Longitudinal and vertical section of the proboscidian sheath, 0, 
of Amphiporus spectabilis (Drepanophorus rubrostriatus, Hubrecht) at the 
anterior third of the body. The apertures, a e, connecting the interior of 
the sheath with the vascular system lie near the dorsal part of the sheath. 
The muscular fasciculi are somewhat coarse. 9( diam. 
PLATE XV. 
Fic. 1.—Transverse section of the anterior chamber of the proboscis of 
Amphiporus spectabilis, De Quatref. (Drepanophorus rubrostriatus, Hubrecht) 
everted, and thus in the same state as Dr. Hubrecht’s, with whose draw- 
ing! it may be compared. 4, glandular (papillose) inner lining; J’, base- 
ment-layer on which the former rests ; c, circular muscular coat ; d, internal 
longitudinal layer; e, reticulated layer, the great longitudinal bands of 
which are lozenge-shaped in transverse section, and, moreover, fibres pass 
from the external tip of the lozenge to the outer layer; ¢’, intermediate 
transverse slips; 7, external longitudinal muscular coat; g, external elastic 
layer with denser (muscular) fibres externally, a few being ruptured in the 
preparation. x 210 diam. 
Fic. 2.—Area of the lateral nerve in Amphiporus hastatus—to exhibit the 
generative tubes and vessels. e, e, outline of the great longitudinal mus- 
cular layer of the body-wall. g, g, dorsal and ventral cellular tubes, which 
meet at g' to pass between the fasciculi of the muscle above the nerve- 
trunk—the usual mode of exit in such forms: the lower tube has been 
sliced obliquely and somewhat flattened ; 7’, refracting granules of the wall 
of the alimentary canal; m, vertical muscular band passing from the dorsal 
to the ventral region, and bounding the former ; n, lateral nerve surrounded 
by its investment, the somewhat cellular appearance occurs only at the 
upper part of the section; x 4, finely granular trunk apparently representing 
a nerve-branch to the longitudinal muscle (e) ; v, ventral vessel; v’, supra- 
neural vessel. > 210 diam. 
1 Aanteekeningen, &., Plate II, fig. 2. 
