JOURNAL OF MICROSCOPICAL SCIENCE. 
EXPLANATION OF PLATES XIV & XV, 
Illustrating Dr. M’Intosh’s Paper “On Amphiporus 
spectabilis and other Nemerteans.” 
PLATE XIV. 
Fig. 1.—Transverse vertical section! through the anterior dorsal region 
of Amphiporus spectabilis, Quatref. (Drepanophorus rubrostriatus, Hubrecht). 
a, cutis; 4, basement layer ; 4 e, peculiar median band; e, circular muscular 
coat of the body-wall; ce, thin decussating layer; ¢ 0, thin coat, probably 
composed for the most part of oblique fibres; d, longitudinal muscular 
layer of the body, showing a somewhat pennate arrangement, and inter- 
sected by the radiating fibres into groups of fasciculi. o a, external or 
chiefly circular layer of the proboscidian sheath ; 0 4, internal or longitudinal 
coat of the same; @ c, mucous layer of the sheath. x 210 diameters. 
Fie. 2.—Similar section near the median dorsal region of Amphiporus 
hastatus. The letters as in Fig. 1. The much greater development of the 
thin layers ¢ e and ¢ 0 is conspicuous. ‘The latter has its fibres less oblique 
than the former (7. e. chiefly circular), the cut ends being very evident in 
longitudinal vertical sections. X 210 diameters. 
Fic. 3. Vertical transverse section of the anterior region of Amphiporus 
hastatus, showing the quiescent generative (?) organs g, g, in the form of long 
tubes filled with granular nucleated cells, and meeting at g’ to pass between 
the fasciculi of the great longitudinal muscular layer of the body wall. 7’, 
the alimentary chamber, only a few of its granules having been indicated ; 
m, lateral nerve. Other letters as before. x about 20 diam. 
Fic. 4.—View of a portion of the wall of the anterior chamber of the 
proboscis in Amphiporus pulcher, from the exterior, the focus being adjusted 
so as to bring out the reticulated layer with its great longitudinal bands 
e, e, connected by the transverse slips e’, e’. 4 the anterior, B the posterior 
margin of the segment, and ¢ the folded edge. The fibres of the inner 
longitudinal muscular coat appear behind the transverse slips of the reti- 
culated layer. x 90 diam. 
1 This and subsequent drawings are from preparations mounted in 
chloride of calcium. 
