NS) 
b 
the tube ringed with imbricating annulations, the free upper surface apparently 
cellular in structure. Ordovician to Carboniferous. 
Conchicolites, Nich. Conical, slightly bent, thin-walled tubes, growing 
together in clusters, and attached by the small lower ends to Orthoceras or 
Brachiopod shells. Tubes made up of numerous short rings, each of which 
partially overlaps the one below. Ordovician. 
Sub-Order B. ERRANTIA. (Nereidae.) 
Free-swimming, predaceous Polychaeta, with well-marked head. Proboscis 
capable of protrusion, and armed with papillae or powerful jaws. Parapodia much 
more developed than im the Tubicola, beset with 
“rn wi! setae, and serving for locomotion. 
ANNA RN 5 
vA NK i WN Undoubted remains of Errant Worms have 
\ ii iitiy ii! 
long been known from the Lithographic Slates 
(Upper Jura) of Bavaria, and include the 
trails, calcified jaws, and excrements of numer- 
ous species. The principal genus from this 
horizon is Hunicites, Ehlers (Geophilus, Germar), 
(Fig. 405), perfect impressions of which are 
also found in the Eocene shales of Monte 
Bolea. 
Under the head of Lumbricaria, Miinster 
(Lumbricites, Schlotheim), (Fig. 406), are in- 
cluded a variety of obscure remains from the 
Lithographic Slates, which may be best regarded 




















































































































































Fic. 405. Fic. 406, 
Eunicites avitus, Ehlers. Lithographic Lumbricaria colon, Miinst. Lithographic Slates ; Solen- 
Slates ; Eichstadt, Bavaria. Natural size. hofen, Bavaria. Natural size. 
as the excrements of Annelides. They occur as irregularly contorted bands or 
strings, sometimes in the form of labyrinthice coils, and are usually of con- 
siderable length. 
The Myzostomidae, which are parasitic on living Comatulas, are shown by 
Graff to have infested also the column segments of Jurassic Crinoids. 
254 VERMES SUB-KINGDOM IV 
