206 IOWA STUDIES IN NATURAL HISTORY 
great patience by Miss Mullin, give no idea whatsoever of the 
beauty and grace of these magnificent forms. One species allied 
to Amphitrite had a dense assemblage of slender round crinkled 
tentacles, almost white in color, forming a tangled mass looking 
like vermicelli. There were three pairs of profusely branched 
gills borne on short thick stems. The annulations of the body 
were marked by sharp ridges bearmg parapodia. The anterior 
part of the body bore prominent shell glands, while the poster- 
ior segments bore pairs of short, very wide, flattened tubes with 
apertures, and were probably nephridial in function. Another 
form, probably a Sabella, made a tube formed of sand and bits 
of shell. It was much smaller than those already described and 
has a very dense crowd of branchi# with what appears to be 
irregularly distributed eye-spots. It was found under rocks 
near the Pillars of Hercules. A serpulid which may belong to — 
the genus Spirobranchia has the gill filaments branched and 
densely crowded, while the ultimate pinne bear bright carmine 
markines; but the most remarkable feature is the operculum. 
This is borne on a straight, rather rigid stalk or pedicel with two 
opposite wings or vanes which grow wider as they ascend to- 
ward the operculum proper. This pedicel expands distally into 
a trumpet-shaped operculum which is red on its upturned con- 
cave surface and has a distinct carmine rim in sharp contrast 
to the outer flesh-colored surface. From the center of the cup 
arises a remarkable structure, bright carmine in eolor, re- 
sembling a pair of deer’s antlers, each with a “‘brow-tine’’ and 
several forked points. This is set on a base resembling the top 
of a deer’s head in contour. The whole affair, operculum and 
antlers, is quite rigid, having a cartilaginous consistency. The 
collar is frilled and extends backward over the thorax like a 
sort of cape and bears six pairs of parapodia with dense tufts 
of sete. This worm forms hard calcareous tubes, smooth and 
porecelain-like inside. It was found growing on the links of an 
old anchor-chain in English Harbor. 
There were several species of “‘sea scorpions.’’ One pre-- 
served specimen is nearly a foot long and two ends are so much 
alike that it is hard to tell them apart. One remarkably stout 
form has a diameter of fully an inch, including the parapodia. 
The notopodia bear dense tufts of sete, an aciculum, and dense- 
