CEASSATELLITE3. 365 



above indicated is confirmed by a label attached to some specimens 

 kindly sent by Professor Tate to the writer. 



Dimensions. — Height 7'5 mm. ; length 8 mm. 



Form, and Loc. — Eocene : Muddy Creek, Victoria. 



L. 9853. Several examples of both valves. Purchased. 



Crassatellites amplus, Zittel (sp.). 



1865. CrassateUa ampla, Zittel, Eeise der Xovara, Palaontologie, Bd. i. 



Abth. ii. p. 46, taf. xiv. figs. 3a-b. 

 1873. CrassateUa ampla, Hutton, Cat. Tert. Moll. N.Z. p. 24. 



Shell trigonal, subequilateral, solid, irregularly concentrically 

 striated ; anterior end broad and obtuse, posterior slightly at- 

 tenuated. The hinges in the Museum specimens are covered with 

 hard matrix. Professor Hutton describes them as follows : "Hinge 

 very broad and thick, cardinal tooth of the right valve attenuated, 

 and bifid at the base ; cartilage pit large and deep ; left valve 

 with two teeth." 



Dimetisions. — Height 68 mm. ; length 87 mm. 



Furm. and Loc. — Eocene and Miocene : l^ew Zealand. 



L. 10490. Examples of the right valve, affixed to block of 

 shelly argillaceous limestone ; from Akuakua (lower beds). 



Sir James Hector Coll. 



L. 10492. Large fragment of right valve ; from Kawau. 



Bir James Hector Coll. 



Crassatellites attenuatus, Hutton (sp.). 



1873. CrassateUa attenuata, Hutton, Cat. Tert. MoU. N.Z. p. 24. 



"Ovate; inequilateral; broad and rounded in front, produced 

 and tapering behind ; posterior dorsal margin straight ; hinge 

 moderate; irregularly concentrically striated." — Hutton. 



The following specimen appears to correspond to the above brief 

 description. 



Dimensions. — Height 107 mm.; length 130 mm. 



Form, and Loc. — Eocene : Trelissick, l^ew Zealand. 



L. 10493. Left valve of the adult. Sir James Hector Coll. 



