Dr. F. A. Bather — The Mount Torlesse Annelid. 



537 



there are differences in the absence of curvature and in the signs 

 of a longitudinal rather than a transverse striation. 



We come then to the conclusion — particularly unfortunate for 

 the stratigrapher — that tlie straight annelid of Mt. Torlesse cannot 

 be ranged with any established genus. Although further information 

 is desirable, still it may be well to draw attention to the fossil by 

 giving it a name : — 



ToBLESSiA, gen. nov. 



A tubicolous Polychfet, of which the tube is unattached, straight, 

 very slightly tapering, circular or elliptical in section, and with 

 relatively stout, unridged, (originally) calcareous walls {circa one- 

 tenth diameter) ; habitat, vertical in marine mud. 



ToKLESsiA Mackayi and Dentalium Huttoni. 



1. Torlessia Maclcayi, No. 24. a, natural size; b, section; c, portion of surface, 



to show strise, x 4 diam. 



2. T. Mackayi, No. 19. Natural size. 



3. T. Mackayi, No. 19. Transverse section from another individual, x 4 diam. 



4. Dentalium Huttoni, No. 22. a, a shell lying on its side, nat. size ; b, larger 



apertui'e of same, showing ridges, x 4 diam. . 



5. B. Huttoni, No. 22. Another shell lying with the smaller curve uppermost, 



nat. size. 



6. D. Huttoni, No. 22. Section of another shell as seen on the surface of the stone, 



probably not quite transverse, and partly crushed, x 4 diam. 



7. JD. Huttoni, No. 23. a, the largest individual on the stone, nat. size ; h, a 



portion sho'wing the ridges, x 4 diam. 



Genotype, Toelessia Mackayi, n.sp. 



Surface smooth or with faint longitudinal striation; description as 

 above. 



