PCECILOMORPHUS CYCLOIDES. 121 



other varieties. It came from Louse Hill, near Sherborne. Plate A, fig. 31, gives 

 the suture-lines of this species copied from d'Orbigny, ' Pal. Franc. Ceph. Jurass.,' 

 plate 121, enlarged six times. It differs in several minor details from the drawing 

 I have made from the sutures of a medium specimen in my collection (Plate A, 

 fig. 32), also enlarged six times, in which the accessory lobe in the siphonal saddle is 

 undeveloped, though the saddle itself is larger. Plate A, fig. 31 shows a larger 

 inferior lateral lobe and broader superior lateral, and inferior lateral, saddles ; but 

 after all these points are of minor importance compared with the general aspect of 

 the suture-lines, which is practically the same. Considering the difficulty which 

 attends the copying of the sutures of such small specimens, it is not at all unlikely 

 that neither delineation is absolutely exact. 



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