LR. Etheridge, jun. Carboniferous Tubicolar Annelida. 265 
EXPLANATION OF PLATE VII. 
Fic. 1. Spirorbis (Microconchus) pusillus, Martin. An example free of matrix, 
Oo  @ eT. a ohpP 
showing the exposed side of the tube, with the aperture bent to one side. 
’ x 6. Calciferous Sandstone Series, Linnhouse Water, near Mid Calder. 
- The same. Another specimen illustrating the flattened, or wholly attached 
side. x 6. Same horizon and locality. 
. The same. A third example, showing the attached side, bearing a groove, 
the vacuity left by the body of attachment. x 6. Same horizon and loc. 
. Thesame. A spec. exhibiting a hollow section of the tube. x 6. As before. 
. The same. An example showing the piled condition of the tube, with a 
minute groove of attachment at the apex of the pile. x 6. As before. 
- The same. Four specimens burrowing in the substance of a leaf of Cordaites. 
x 2. In shale, Ireland. 
. A cluster of the same species on the interior of portion of a Myaliniform 
shell. x 2. lL. Carboniferous, River Tweed, below Coldstream Bridge. 
. Var. simplex, R. Eth. jun. The simplest condition of this species. x 2. 
Wardie shales, Straiton Oil Works, near Burdiehouse. 
. Spirorbis ambiguus, Fleming. A characteristic example, from which the 
striee of growth have been omitted. x 6. lL. Carboniferous limestone 
group, Roscobie, near Dunfermline. 
10. Another specimen from the same locality. 
11. 
12. 
13. 
14. 
15. 
16. 
Ie 
18. 
19. 
20. 
A large decorticated individual adhering to a fragment of coral (?). x 2. 
Law Quarry, near Dalry. 
Spirorbis helicteres, Salter? A portion of the decorticated free tube? 
x 6. Law Quarry, near Dalry. 
Spirorbis helicteres, Salter. Scattered over the weathered surface of a 
piece of ‘‘Spirorbis-limestone.’? x 2. Carboniferous limestone ? 
Mitchell Dean, Gloucestershire. 
A microscopic section of same, showing the hollow condition of the tubes. 
Another specimen of the free portion of the tube of this species? x 4. 
Law Quarry, near Dalry. 
Spirorbis caperatus, M‘Coy. A typical example. x 6. lL. Carboniferous 
limestone group, Burlage Quarry, near Dunbar. 
Another example of the same, showing its attachment to a small spine. 
x 6. LL. Carboniferous limestone group, Skateraw Quarry, near Dunbar. 
The same. With a portion of the short tree tube. x 6. Inverteil Quarry, 
near Kirkcaldy. 
Spirorbis spinosa, de Koninck. A small specimen in which the spines are 
but faintly represented. x 6. lL. Carboniferous limestone group, 
Skateraw Quarry. 
The same. Another example showing the mouth. x 6. Same horizon 
and locality. 
21. The same. Attached to a small Crinoidal stem. x 6. As before. 
22. Spirorbis Hichwaldi, R. Eth. Jun. <A typical specimen with the large 
expanded terminal whorl and spinous periphery. x 6. Calciferous 
Sandstone Series, Oakbank Oil Works, near Mid Calder. 
23. A somewhat less crushed form of the same. x 6. From the same locality. 
24. Another example, showing the flattened attached side. x 6. Same 
locality, ete. 
25. Spirorbis Armstrongi, R. Eth. Jun. A rather crushed specimen attached 
to a fragment of Swlcoretepora, with the strong lamellar ridges shown. 
x 3. L. Carboniferous limestone group, Carlops. 
26 and 27. Spirorbis Dawsoni, R. Eth. Jun. Two examples of this minute 
species. x 6. lL. Carboniferous limestone group. Fig. 26, from Seafield 
Tower, near Kirkcaldy ; Fig. 27 from the ‘‘ Vaults,’’ near Dunbar. 
28. Spirorbis, sp. ind. A fragment with very strong accretion ridges. x 6. 
29 
L. Carboniferous limestone group, Burlage Quarry, near Dunbar. 
. Serpulites carbonarius, M‘Coy. A fragment of a yery large specimen, 
with the thickened marginal ridges. The surface should have been 
slightly striated transversely. Fig. 29a. Another fragment with a 
longitudinally wrinkled surtace. Fig. 298. Cross section of the same. 
Nat. size. Carboniferous limestone? Lesmahagow. 
