A CONTRIBUTION TO THE ANNELIDA. 75 
Fic. 3.—Vertical longitudinal section of the anterior region of the same 
species on one side of the median line, showing the muscular fibres, m., 
passing to the caruncle, car. ocd. Dorsal eye. cv. Part of a ventral 
eye. c.g. Cephalic ganglia. v. Section of blood-vessels. . Mouth. 
wf. Anterior folds of the lining of the mouth. From the slightly oblique 
nature of the section certain of the anterior bristles, &c., are seen in front. 
x 55. 
Fic. 4.—Transverse section of a branchial stem, towards the base. x 350. 
Fig. 5.—Transverse section of the same organ, towards the tip. Zeiss, 
obj. D; oc. 1. 
Fic. 6.—Vertical (transverse) section of a branchial stem as it leaves the 
surface of the body, showing fibres entering the region. X 350. 
Fic. 7.—Vertical longitudinal section of the anterior end of E. foliosa. 
bs. Gastric chamber. 47. Transversely ridged region, only a portion being 
seen in this section. e¢. Muscular ridges. g/. Glandular area. w. Mouth. 
wf. Folds of the buccal membrane. x 24. 
Fic. 8.—Slightly oblique section (though more or less vertical and trans- 
verse) of the cephalic ganglia of Euphrosyne foliosa in the region of the 
dorsal eyes. xX 55. 
PLATE 7. 
Fic. 1.—Vertical (transverse) section of the region of the caruncle in 
Euphrosyne cirrata. a. Vertical fibres from the ventral region, above 
nerve-trunks. car. Caruncle. ¢. Tentacle. The knife has passed through 
the caruncle after the central space has disappeared. The section is probably 
more or less oblique. x 55. 
Fic. 2.—Slightly enlarged view of a softened example of Huphrosyne 
foliosa, with the alimentary canal exposed. a. Anterior glistening region 
of the proboscis. 4. Dorsal continuation of the canal. ce. Striated or ridged 
muscular region. d. Pyloric part of the passage 4. e. Intestine. 
Fic. 3.—Vertical transverse section of the proboscidian stem near the 
glandular region. A thin line cuts off a lateral area at each side. ds. Ali- 
mentary canal. x 80. 
Fic. 4.—Vertical transverse section of the anterior ventral region. da. 
Wall of intestine. x. c. Nerve-cords. cc. m. Circular muscular coat; the 
same letters mark the nerve-commissure. The oblique fibres decussate beneath 
the nerve-trunks, and join the circular coat. Sections of vessels are seen at v. 
Fic. 5.—Transverse vertical section of the anterior region, where the 
canal, Js, from the gastric region joins the intestine, da. vd. One of the 
dorsal trunks. vg. Central dorsal vessel. gp. Reproductive elements—in 
this case male. x about 60. 
