PLATE 3. 
Fig. 1. Teruys cervina Dall and Simpson. 
Fig. 1. Semidiagrammatie representation of the parieto-visceral ganglion complex as s 
from below. The contour of the organ of Bohadsch is represented by the dotted line, o B. 
anterior end of the animal is directed toward the upper margin of the Plate, the right side ¢ 
sponding to the left one of the figure; pl-par. c, pleuro-parietal connective; pl-v. c, pleuro-visce 
branch 1 a anastomosing with the branch 3f of the third pedal nerve, 3 ped, its branch 1 6 for 
the vulvar nerve; p 2, second parietal, or osphradio-ctenidial nerve; osp. g, the osphradium and 
ganglion, the fine terminal nerves passing to the ctenidium; ». 1, first visceral nerve, to the sper 
totheca and its duct; v. 2, the second visceral nerve, 2 a, its hepatic branch, 2 6, its main ramus, 
to the rectum, 7, and siphon, s, and the adjacent peritoneum; 2, its recurrent branch to the organ | 
Bohadsch and anastomosing with 3b, the branch of the third pedal nerve, 3 ped, to the same org 
v 3, the third visceral nerve, supplying the genital ganglion, g.g, and the reproductive tract; v. 4, th 
fourth visceral nerve, branching into 4a, to the ventricle, v, and the pericardium, pc, and 4 6, to 
auricle and pericardium, aw. pe, and to the kidney, k. : 
Fig. 2-4. DoLABELLA AGASSIZI, sp. nov. 
Fig. 2. A similar representation of the parieto-visceral ganglion complex. The abbrevia‘ 
used in Fig. 1 apply to this figure except that the second, third, and fourth visceral nerves 
by a single trunk, v. 2, which bifureates into ».2a and v.2b; v.2a has relations similar to v. 
of the preceding figure, save that its recurrent branch to the organ of Bohadsch forms an anasto) 
with a branch of the seventh, 7 ped, instead of the third pedal nerve; v. 26 gives off a 
261, to the peritoneum of the spermatotheca, another, 2b 3, to the genital ganglion complex, 
ponding to the third visceral nerve, v. 3, of the preceding figure, while the remainder, 2 b 4, 
senting the fourth visceral nerve, v. 4 of Fig. 1, is like it distributed to the heart, pericardium, and 
Fig. 3. Buccal ganglion complex as seen in dorsal view, 7. e. the face in contact with the pha 
geal bulb. The outline of the connective-tissue sheaths of the ganglia and nerves is indicated — 
the dotted lines. The nerves are numbered serially b.1 to b. 4, and are described fully in the 
text. The second nerve gives off a branch, c-b. con, which passes around the pharyngeal bulb to’ 
the dorsal side and unites with the cerebral ganglia as the cerebro-buccal connective, (c-b. con, Plate 2, 
fig. 1); b 1 a, superficial branches of the first buccal nerve, b 1, shown in detail from the ventral surface 
Fig. 4. Ventral surface of the first buccal nerve, b 1, showing the origin of its superficial branches, 
Lax Xs. 
