PLUMULARIANS. 
237 
Fig. 6. A single calycle of the same species, highly magnified, a. The 
cup in which the polypite is lodged, b. The anterior sarco- 
theca. b'. One of the bean-shaped thread-cells, c. One of the 
lateral sarcothecae. d. The internode of the stem. 
,, 7. One of the lateral appendages of the corbula of Aglaophenia 
myriophyllum , Linnaeus, magnified, b. Portion of the mid-rib. 
p. Short stem, bearing a single calycle (c). a. Curved 
appendage bearing sarcothecae. c'. Second calycle. 
PLATE CXI. 
Fig. 1. Plumularia pinnatn, Linnaeus, natural size. 
„ 2. Plumularia cornucopia, Hincks, natural size. 
„ 3. A portion of one of the plumes magnified, c. The calycle. s. 
The sarcotheca. g , g. Reproductive capsules. 
„ 4. One of the lateral sarcothecae of Aglaophenia p\ima, Linn., 
showing the thread-cells in action, magnified, a. The upper 
lobe of the contained sarcode-mass (the sarcostyle, s) bearing 
the thread-cells, b. The lower lobe, from which the a moeboid 
processes arise, c. The common flesh, from the outer layer of 
which the sarcostyle takes its origin, d. The chitinous case 
of the sarcotheca. 
„ 5. The two-chambered sarcotheca of Plumularia setacea , Ellis, 
shewing one of the amoeboid processes, a. The upper lobe 
with thread-cells, b. The extensile process, cc. The terminal 
cup-shaped chamber in which the lobes are lodged, y. The 
inferior tubular chamber. 
„ 6. Portion of a pinna of Ophionema parasiticum, G. O. Sars, 
magnified, showing two of the snakelike organs, one above 
and one below the calycle. a. The small chitinous cup. 6. 
The flexible and extensile trunk, c. The enlarged capitulum, 
containing thread-cells. 
This figure is after G. 0. Sars. 
