Miscellanea. 3,29 



Pleurotomaria Morrisiana (M'Coy), PL XVTI. fig. 5.' 



Sp. Char. Acutely conical, width four-fifths of the length ; \'olu- 

 tions four or five, each havmg a small double keel below fhe 

 middle, and a slightly tumid margin to the sutures ; no umbilicui?; 

 surface with fine close unequal stria3 arclied backwards from the 

 suture to the keek Width 4 lines, length scarcely 5 lines. 



As the characters of this little species seem to have been already 

 recognized and slightly alluded to by my friend Mr. Morris (in 

 Count Strzelecki's work), I dedicate it to him. It is, as he observes, 

 something like the P.conica (Phil.), but smaller and more elongate. 



Abounds in some parts of the hmestone of Black Head, N. S. 

 Wales, and rare in the sandstone of Muree, N. S. Wales. 



Platyschisma rolundatum (Mor.). 



Abundant in the dark arenaceous limestone of Harper's HilL 

 N. S. Wales. 



Platyschisma oculus (Mor.). 



Common in the arenaceous limestone of Harper's Hill, 



{Pteropoda.) 



Theca lanceolata (Mor.). 



Abundant in the dark arenaceous limestone of Black Head, N. S, 

 Wales. I observe that, at the longitudinal furrows, the ends of the 

 transverse sulci alternate with each other as in Conularia. Those 

 longitudinal furrows are not noticed by Mr. Morris in his descrip- 

 tion of the genus and above-named species ; but they exist, of 

 the same number as in Conularia, one coinciding with the prin- 

 cipal (? dorsal) ridge, two being placed a little on the (? posterior) 

 side of the lateral angles, and one in the middle of the flat (? ante- 

 rior) side. It is of importance to notice those obscurely-marked 

 furrows, as bringing more clearly to view the relations of the genus 

 Theca with Conularia. The transverse sulci are crossed by very 

 minute longitudinal striee. 



Conularia IcEvigata (Mor.). 



Common in the fine gray micaceous sandstone of Black Creek, 

 N. S. Wales, and in the limestone of Harper's Hill, N. S. Wales. 



Conularia torta (M'Coy). PI. XVII. figs. 9 & 10. 



Very elongate-conic, diminishing in diameter at the rate of one 

 line in two inches ; section oval ; lateral longitudinal channels only 

 two (?), placed with a slight obliquity to the long axis of the shell, 

 giving it a twisted appearance, being placed at the sides (or extre- 

 mities of the short axis) of the oval section at the base, and being 

 at the ends (or extremities of the long axis) of the oval section 

 near the small end; sides very convex, without mesial furrow; 

 transverse sulci coarse (about fifteen in half an inch), contirmed 

 uninterruptedly across from one side furrow to the opposite. 



'J'his extraordinary fossil seems to differ from all known Conularioe 

 in having but two instead of four longitudinal furrows (for although 

 MM. D'Archiac and Verneuil give an oval section of their C. 

 Brongniartii showing but two furrows, I suppose this to be erro- 

 neous, as it neither agrees with their description nor larger figure). 



