PLATE 22
FIGURE 1, 2, 4. Xenophora delecta (Guppy) (p. 77).
 Height 25 m, diameter (incomplete) 46 mn). Locality 173. Upper part of Gatun formation, eastern area, middle Miocene. USNM 561434. 3, 5. Calltostoma (Leiotrochus) eremm Woodring, n. sp. (p. 63).
 Type. Height (incomplete) 17.5 mm, diameter 19 mim. Locality 155c. Middle part of Gatun formation, middle Miocene. USNMI 561311. 6-9. Turritella mintetes Brown and Pilsbry (p. 110).
 6. Height (incomplete) 73 mo, diameter 17.5 mm. Locality 1556. Middle part of Gatun formation, middle Miocene. USNM 561396.
 7. Height (incomplete) 56 mm, diameter 15.3 mo. Locality 185. Upper part of Gatun foroaationt, western area, late Miocene. USNM 561397.
 8. Height (incomplete) 45 mo, diamteter 18 mnm. Locality 155a. Middle part of Gatun formation, middle Miocene. USNM 561398.
 9. Height (incomplete) 7 m diameter 2.4 mmn. Locality 161. Middle part of Gatin formation, middle Miocene USNMi 561399.
 10. Turritella bifastigata Nelson (p. 111).
 Height (not quite complete) 66 mm, diameter 18.5 mm. Locality 137. Lower part of Gatun formation, middle Miocene. USNM 561400. 11, 12. Turritella matarucana Hodson (p. 107).
 Lower part of Gatun formation, middle Miocene. 11. Height (incomcplete) 23 mm, diameter 7.5 cmcc. Locality 136. USNAI 561391.
 12. Height (incomplete) 44.5 mmc, diameter 16 mm. Locality 137. USNI 561390.