37 



Annelida. 



Genus Cornulites, Schlotheim. 

 (Petrefaktenkunde, 1820, p. 378.) 

 Cornulites tasmanicus, sjj. nov. 

 PI., Fig. 10 & 11. 



Obs. — Several decorticated casts of this interesting sup- 

 posed Tubicolar Annelid occur at both localities. The 

 longest example is one and a half inches, and in that 

 space portions of at least thirteen or fourteen rings or 

 annulations are visible. In a small fragment preserved in 

 the round, the greatest diameter is three-eighths of an inch. 

 The inverted conical annulations are broad, measuring fully 

 one-eighth of an inch in the direction of their growth, 

 and with the semi-imbricating appearance common to the 

 genus. 



As the specimens are but casts of the interior, it cannot 

 be expected that any trace of the fine longitudinal micro- 

 scopic striae that ornament the exterior of these organisms 

 would be preserved, but one impression, apparently of an 

 outer surface, exhibits a concentric wrinkling that may 

 possibly represent the irregular outer surface of a Cornu- 

 lites. A similar irregularity of surface is excellently shown 

 in Prof. Hall's figure of C. proprius^ from the Niagara 

 Group of Indiana State. The internal annulated casts are 

 very like those of the characteristic C. serpularius of the 

 European Wenlock beds, but the annulations are longer 

 {i.e., longitudinally V The sharp and distinctly annulated 

 form of the segments in these tubes also finds a counter- 

 part in C. armoricanus.CEhlert,^ from the French Devonian 

 rocks. Again, a striking resemblance exists in the strongly 

 imbricate and subindibuHform condition of the segments 

 in our casts to Prof. Hall's figures of C. chrysalis,^ a species 

 of the Lower Helderberg Group of N. America. Many 

 other comparisons might be made, but these are sufficient 

 to indicate the relations of our form. 



Loc. — Heazlewood, in a blue-grey schistose rock ; 

 Zeehan, in a white to grey schistose rock. 



1 Indiana Geol. Survey Report, 1881 [1882], XI., p. 327, t. 22, f. 4; 

 28th Ann. Report N. York State Mus. Nat. Hist., 1879, t. 31. 



2 Bull. Soc. Etudes Sci. Angers, 1887, t. 10, f. 5, 5 a 8c b. 



3 Pal. N. York, 1888, VII. t. 116, f. 26-28. 



