546 rREPORT—1883. 
+hese shy creatures love to hide themselves, every old shell should be examined. He 
had found the empty. shells of the Whelk most productive. One specimen which 
a Hermit-crab had appropriated proved a veritable Noah’s Ark. On the outside 
it was encrusted with colonies of Hydrozoa, within the mouth he found a patch of 
Hermella; and associated with this species, a minute Sipunculus and a delicate 
-worm often found in the substance of old shells (Zewcodore). Even then the list 
was incomplete ; on breaking open the shell he exposed lurking within the terminal 
spiral, one of the finest species of Nereis (1. bilineata), and lastly, two or three 
youthful serpule. 
The following list is far from exhaustive, the object having been to indicate the 
characteristic sand-worms. 
Critical species have been identified by Prof. Macintosh. Nematoid worms, 
many of which are found near low-water mark, have been omitted. 
1. ERRANTES. » 
Amphinomade. 
Aphrodite aculeata, L.—Found sparingly in wet hollows after high tides, 
Photoé Baltica (?).—Only one specimen. 
Polynoa squamata, Say.—Rare, within old shells, frequently among the refuse 
from fishing boats. 
Polynoa asterine.—Occupying the groove between the suckers of Asterias 
aurantiaca. My attention was first directed to this species by observing a blue 
phosphorescence given off from one or more rays when the Star-fish was plunged 
into fresh water. The worm is long and flesh-coloured, the scales entire, with a 
black border. 
Sigalion Mathilde.—A beautiful species with fringed pearly scales, not uncom- 
»mon, coiling round the tubes of Terebella. 
2. NEREIDA. 
Nereis pelagica, L.—Among the refuse of oyster beds we find the ordinary 
pinkish forms. But occupying burrows in damp places another variety is frequent, 
of a deep velvety green or orange colour, which may be the WV. viridis, L. 
Another form abounds near high-water mark, from which the tide is absent 
for months together. The feet are longer, and the colour orange shaded with olive. 
N. bilineata, Johns.—Occupying the terminal whorl of old whelks, generally 
-associated with Pagurus Barnhardus. 
Nepthys margaritacea, Sars. 
N. Hombergit, Sars.—Several species of Nepthys are common in the sand. 
Some specimens were from six to eight inches long, and as thick as the little 
finger. From the habit of suddenly everting the formidable proboscis, they look 
very threatening. 
Phyllodore lamelligeus, Johns.—Not unfrequent. 
Seyllis prolifera, Matt.—Frequent in muddy hollows. 
Pollicita peripatus, Johns.—Very rare. 
‘Goniada maculata, Johns.-—-Only one specimen. 
‘Glycera alba.—Very rare. 
_Aricie.—Occupying burrows in the sand. 
Nerine vulgaris, Johns.—Very rare. 
N. coniocephala, Johns.—Not uncommon in muddy hollows about mid-tide. 
‘This lovely species occupies a friable tube, descending a foot or more. The body is 
pellucid green, crossed by carmine bands (the branchial processes). 
Leucodore ciliatus, Johns.—Common in old shells. 
Mea mirabilis, Johns,—Found in some abundance near low water in a muddy 
‘spot opposite Broad Slalk, Birkdale. 
Arenicola piscatorum, L.—Common. 
3. TUBICOLES, Cuv. 
(a) Tubes arenaceous. 
Pectinaria Belgica, L.—Common near deep water. 
