PLATE XLIIL 
Figs. 1-10. Goodsiria placenta, n. sp. 
a. Anus. 
at. Atrial aperture. 
at. tn. Atrial tentacles. 
br.f. Fold in branchial sac. 
d. 1. Dorsal lamina. 
h.t. Glandular tubules on wall of 
intestine. 
i. Intestine. 
i. 1. Internal longitudinal bar of bran- 
chial sac. 
m. Mantle. 
n.g. Nerve ganglion. 
01 . (Esophagus. 
^p.f. Peripharyngeal band. 
r. Eectum. ' 
sg. Stigmata of branchial sac. 
st. Stomach. 
tn, tn'. Tentacles. 
tr. Transverse vessel of branchial sac. 
ws. Vesicle into which the glandular 
tubules open. 
Fig. 1. Qolonj oi Goodsiria placenta ; natural size. 
Fig. 2. Transverse section of colony of Goodsiria placenta ; natural size. 
Fig. 3. Part of the test of Goodsiria placenta, showing vessels; magnified (S., 1 inch). 
Fig. 4. Part of branchial sac of Goodsiria plojcenta, showing folds and dorsal lamina ; 
magnified (S., 1 inch). 
Fig. 5. Alimentary canal of Goodsiria placenta ; slightly enlarged. 
Fig. 6. Alimentary canal of another Ascidiozooid of Goodsiria. placenta ; magnified 
(S., 1 inch, reduced). 
Fig. 7. Glandular tubules from wall of intestine ; highly magnified (S., ^ inch). 
Fig. 8. Part of intestine and stomach showing glandular tubules opening into a vesicle 
which communicates with the stomach ; highly magnified (8., ^ inch). 
Fig. 9. Tailed larva of Goodsiria plaeenta ; magnified (8., 1 inch, reduced). 
Fig. 10. Anterior part of Ascidiozooid of Goodsiria placenta, showing branchial and 
atrial tentacles, &c.; magnified (8., 1 inch). 
