| 21. | Except for growth line, the shell is smooth.
|
| 22. | The growth lines of the bones indicate that the specimen was perhaps five to six years old.
|
| 23. | When conditions improve again and the mantle resumes its task, a " growth line " is produced.
|
| 24. | Growth lines show a broad crest on either side that swings forward above the ventral hyponomic sinus.
|
| 25. | Growth lines indicate a shallow hyponomic sinus.
|
| 26. | It has about seven whorls, defined by a distinct spiral thread, often showing delicate, microscopic transverse growth lines.
|
| 27. | Grossly, perikymata are incremental growth lines that appear on the surface of enamel as a series of grooves.
|
| 28. | When small osteoderms are found, they include compact structures, low remodeling and poor growth lines which suggests early development.
|
| 29. | Surface ornament may consist of various combinations of straight or crinkled growth lines, flares, constrictions, and, more rarely, plications.
|
| 30. | Layers of dust-like particles parallel to the seed plate, and strong banding or growth lines may also be apparent.
|
