Johnson.— Polychaeta. 
PLATE 14. 
Figs. 140-142. 
Ammochares occidentals s. 
Fig. 140. Anterior portion, ventral aspect. The tori are represented, but the 
uncini are invisible at this magnification. X 1 
Q 
•J • 
Figs. 141 a, b. Uncini, frontal aspect and profile. When in situ , only the por¬ 
tion distal to the constriction is exposed. X <300. 
Fig. 142. Seta, showing double serration. X 450. 
Fig. 143. Portion of digestive tract of Arenicola claparedei, showing lower sec¬ 
tion of oesophagus ( oes .); oesophageal coeca of two kinds (c, c'), and 
the anterior extremity of the chlorogogous tract [ch.). The most 
anterior pair of coeca (c.) are always much larger than the rest, 
thin-walled and highly vascular. The other coeca (ch) are thick- 
walled and the surface is striated. They are not always paired, and 
the number is highly variable (ten in the present instance, which is 
about the minimum). Free-hand drawing, x 2. 
Oesophageal coeca of another specimen, showing the thin-walled, 
vascular pair (c.) in a much-contracted condition. The smaller coeca 
(ch) number fifteen on each side (with one exception the highest 
number hitherto observed) and are quite uniform as to size. Several 
are attached at or near the median line. Free-hand drawing, x 2. 
Fig. 144. 
Figs. 145-148. 
Cirratulus cingulatus. 
Fig. 145. Anterior portion, showing tentacular filament (t. /.) and three most 
anterior pairs of cirri, all cut short, x 9. 
Fig. 146. Two somites from middle of body. The dorsal cirri are broken off, 
but the points of attachment are shown. X 13. 
Ventral setae, and two uncini in situ, x 187. 
Ventral hook, middle region. X 150. 
Fig. 149. Anterior portion of Cirratulus robustus. The tentacular filament 
(t. /.) and dorsal cirri are broken off at point of attachment. X 9. 
Fig. 150. Somites 36-38 (anterior third of body), left side of the same. Points of 
attachment of cirri are distinctly shown, x 13. 
Fig. 147. 
Fig. 148. 
