425 
Plate LXVI. 
Fig. 39 .—Mopsea tenisoni, Cliapm. Transverse section of sclero. 
basic axis, showing finely tegulate structure of the succes¬ 
sive curved layers, and secondary radial arrangement- 
Mallee bore No. 11, 585-590 feet. x 14. 
40. —Mopsea cf. encrinula, Lam. Transverse section showing 
coarsely tegulate structure, x 14. 
41. —Isis compressa, Duncan. Transverse section of axis, showing 
highly ornate tegulate structure. Mallee bore No. 11, 
495-500 feet, x 14. 
42. —Serpula ouyenensis, Chapin. Transverse section of tube, 
shewing laminated inner layer and tubulated outer layer. 
Mallee bore No. 11, 585-590 feet. x 36. 
43. —Lepralia gippslandii, Waters. Mallee bore No. 5, 175-189 
feet, x 7. 
Plate LXYII. 
Fig. 1 .—Glycimeris maccoyi, Johnston sp. Form a, with 32 riblets. 
Balcombian series Grice’s Creek, Port Phillip. Coll. 
W. Kershaw. Nat. size. 
2. — G. maccoyi , Johnston sp. Form b (=Pentunculus laticos- 
tatus, McCoy, non Q. and G.), with about 40 riblets. Jan- 
jukian series. From McCoy’s type locality, Bird Rock 
Cliffs, Torquay. Coll. J. F. Bailey. Nat. size. 
3. — G. maccoyi, Johnston sp. Interior of valve showing finely 
striated area. Janjukian series. Bird Rock, Torquay. 
Geol. Surv. Yict. coll. Nat. size. 
4. — G. maccoyi, Johnston sp. Specimen with 29 riblets. Jan¬ 
jukian series. Table Cape, Tasmania. Nat. size. 
5. — G, maccoyi, Johnston sp. Form c, with 30 riblets. Kalimnan 
series. Macdonald’s, Muddy Creek. Coll. F. Chapman. 
Nat. size. 
Plate LXVIII. 
Fig. 6 .—Glycimeris laiicostatus, Quoy and Gaimard sp. Living. 
Coast of New Zealand. This species has about 40 riblets. 
Interior of valve to show the comparatively coarsely 
striate area. Nat. size. 
7. —Trigonia lamarcki, Gray. Mallee bore No. 9. 315-325 feet. 
Nat. size. 
8. — T. lamarcki, Gray. Living. Coast of New South Wales. 
For comparison with the above fossil. Nat. size. 
9. — T. lamarcki, Gray. Costation of living specimen, magnified. 
x 7. 
10.— T. howitti, McCoy. Costation magnified for comparison with 
the preceding figure. Cainozoic (Kalimnan series). Mac¬ 
donald’s, Muddy Creek. Dennant coll, x 7. 
IV— T. margaritacea, Lamarck. Living example. Bass Strait. 
Nat. size. 
