317 



Cyprsedia clathrata, Tate. 



(Trans. Roy. Soc. S. Aiist., vol. XTTI., 1892, pi. ix., %. 1 ; 

 without description. ) 



Shell oval-pyriform ; anterior canal produced and somewhat 

 dilated at the end. The surface is ornamented by revolving 

 slender threads, alternately large and small, which are crossed by 

 transverse threads equal in strength to the longitudinal second- 

 aries ; the intersections of the two sets of threads produce rect- 

 angular interspaces, which are very finely reticulate-striate. 

 There are about ten primary revolving threads in about the 

 middle-third of the dorsal surface, equal to 8 mm. of the axial 

 length. 



Dimensions. — Length, 27 mm.; width, 18 mm. 



Locality. — Eocene marls, Blanche Point, Aldinga Bay. This 

 species resembles C. ehgans, Defr., Ijut the pits lietween the 

 primary threads are oblong, not square ; the interstitial ornament 

 is finely reticulate ; and the canal is more produced and dilated. 



FAMILY SCALARIIlL^l 



Cpossea semiornata, ^i^^c. vor. pi. x., fig. lo. 



Shell depressedly conoidal, of four whorls ; the first two 

 convex. 



The penultimate whorl is quadrate in section, ornamented 

 with an elevated rounded carina at the shoulder, a similar one 

 mid-way to the anterior suture, and a threadlet margining each 

 suture, which is sub-canaliculate ; the whole surface crossed by 

 stout equidistant riblets, which are approximately axial on the 

 anterior-half of the whorls, and produce rectangular pits between 

 the revolving cinguli, on the posterior-half the riblets are oblique. 

 The body-whorl is convex, interrupted in the posterior-third by a 

 slight keel continuous with the posterior cinguli of the penult- 

 imate whorl ; the ornament of the penultimate is continued on to 

 the body- whorl, l)ut gradually fades aAvay at about a-half turn, 

 the rest of the surface being polished and obscurely striated 

 coincident with the outer lip. 



Dimensions. — Length and width, 2 mm. (vix). 



Locality. — Eocene; Bird-rock Bluff, Spring Creek, near Geelong 

 (two exs.). 



In my synopsis of the species (living and fossil) of this genus, 

 C. semiornata will belong to section 2 of " group III." from the 

 other members of which it is distinguishable by its fenestrated 

 ornament and smooth body-whorl. 



Sealaria (Aerilla) leptalea, v>''. ''^'- Pi- ^-i fig- i- 

 Shell thin, very slender, imperforated ; ordinary whorls, six^ 

 convex, slightly angulated post-medially ; nuclear whorls two and 



