80 



Turblnolia. A stony polypifer ; free, simple, turbinated 

 or cuneiform ; longitudinally striated on the outside ; the 

 base pointed, the terminating cell stelliformly lamellated and 

 sometimes oblong. 



These bodies are considered, by Lamarck, as differing 

 from caryophillia, in not being fixed or adherent. 



Lamarck enumerates eight species, all of which are fossil : 



1. Turb. patellata. Organic Remains, ii. PL iv. fig. 6. 



An interesting specimen of this species is formed by a spathose 

 cast retaining satisfactory marks of its origin. 



2. turbinata. Mad. Am. Acad. i. Tab. iv. fig. 2, 3, 7. Organic 



Remains, ii. PI. iv. fig. 3, 10, 11. 



3. cyathoides. Mad. turbinata. Am. Acad. i. Tab. iv. fig. 3 ; 



Organic Remains, ii. PI. iv. fig. 3. 



4. compressa. Organic Remains, ii. PI. iv. fig. 9. 



5. crispa. Cuneiform, sulcated externally with longitudinal 



undulated grooves ; the star oblong, with rough lamellae on 

 the side. Grignon. 



6. sulcata. Cylindrically striated ; with longitudinal grooves, 



the interstices transversely striated. Grignon. 



7. clavus.< Clavatedly turbinate, straight, with longitudinal 



granulated and subdentated striae. Agin, and Aix-la-Chapelle. 



8. caryophyllus. Roundish, but turbinated, with simple striae 



externally. Organic Remains, PI. xiii. fig. 10. 



Cyclolites. A stony free polypifer, orbicular or ellip- 

 tical ; convex and lamellated in the upper part, with a cen- 

 tral groove ; flat beneath, with sunken, concentric circular 

 lines ; one lamellated star occupying the upper surface, with 

 entire, smooth, and very slight lamellae. 



1 . Cycl. numismalis. Mad. porpita ; Lin. Am. Ac. i. Tab. iv. fig. 1 . a. b. 



2. hemispJuerica. Scheuch. Herb. Diluv. Tab. xiii. fig. 1. 



3. cristata. Orbicular; convex and lamellated on the upper side, 



with variously crested, slightly decussating ridges. 



