6 Bolton, New Brachiopoda and Mollusca. 



the presence of an anterior lunule. In well-preserved 

 specimens the lunule and anterior border meet in an 

 obtuse angle. The species seems restricted to the shales 

 overlying the Cannel mine of the middle coal-measures. 

 For some time I regarded the species as belonging to 

 the genus Schizodus, but further consideration has led me 

 to place it in the genus Tellinomya (Nucula?) by reason 

 of the presence of an external ligament, a lunule, and a 

 feebly marked corselet, and by the absence of the 

 posterior truncation and oblique ridge so characteristic of 

 Schizodus. • 



One cast shows a small anterior adductor impression. 



The occurrence of the species in so many localities 

 immediately over the Cannel seam of the middle coal- 

 measures makes it of considerable value as a zonal 

 fossil. 



Naticopsis globularis, sp. nov. (PL 5, f. 9). 



Diagnosis: Shell globose, spire depressed, and very 

 acute, volutions six, increasing in size rapidly, last 

 volution large and swollen ; suture well defined ; aperture 

 ovate. Surface smooth or marked by faint lines of 

 growth. 



Locality and Horizon : Carre Heys, Colne ; over 

 Bullion coal, lower coal-measures. 



Observations : This beautiful little Naticopsis is to be 

 found in most collections from the Lancashire coal- 

 measures. 



It is readily distinguishable by the almost globular 

 last volution, above which stands the extremely short 

 acute spire. 



Specimens are almost invarably completely pyritised. 



RAPHISTOMA (?) ORNATA, Sp. 110V. (PL 5, f. 10). 



Diagnosis: Shell small, spire depressed, increasing in 

 size rapidly ; consisting of three and a half whorls. 



