JPG) AVN) OW 
Merorcoceras, Herz. 
Pics l=44 Metoicoceras) swallow, (Shumand))s) Sse sys a eee ae ee eee eee eee eee 118 
Figs. 1,2. The imperfect and crushed base of living chamber restored in fig. 2. 
3,4. Right and left sutures of fig. 1, of same age, showing differences in 
number and outlines of auxiliaries. All natural size. 
Texas; Colorado epoch; Coll. Amer. Mus. Nat. Hist., New York. 
IRIGS sib =SemeMetorcocenasnguU LOST Kelby aut less aes tae ai ee ee eee 121 
Figs. 5, 6. Natural size. 
7, 8. Suture of right and left sides, respectively, as seen when looking at the 
specimen fig. 5, natural size. 
Texas; Coll. Amer. Mus. Nat. Hist., New York. 
Fics. 9-11. Metoicoceraus kanabense Hyatt @. 
Figs. 9, 10. Natural size. 
11. Suture of left side of the second quarter of outer volution, x 23. The 
living chamber extended from the crack in the specimen, fig. 10, 
for the remaining one-half yolution, and was most probably nearly 
complete. 
Upper Kanab Valley, Utah; Colorado epoch; Coll. U. 8. Nat. Mus. 
larers, NOS, Jelaosien manana ISQYENIS Go ca sock aepeces5o sks eee sea snaosoadc so ssobasoseusouscosses 132 
Fig. 12. Entire specimen, right side. 
13. Same separated and center excavated, left side. 
14. Front view of same, center one-half-restored. 
15. Ventral view of fig. 12. 
16. Suture at place marked by arrow in fig. 13, X 7, actual length 3 mm. 
17. Dorsal suture, < 8, of second quarter of outer volution of fig. 12, one-half 
actual diameter 2 mm. 
18. Suture of right side fourth quarter of outer volution of fig. 12, 3. 
All natural size except figs. 16, 17, and 18. 
Escragnolles, France; Barrémian; Coll. Mus. Comp. Zool., Cambridge. 
Gael O20 seEleunzranpnovun craves (C4 Or; (1 riya atts es 131 
Fig. 19. Dorsal suture next to outer volution across the umbilicus and opposite 
termination of outer volution, < 9, one-half actual diameter 1.5 mm. 
Of same type, but more immature at the same age than in Heinzia 
matura. 
20. Natural size. 
Locality and collection same. 
« No description of this species was found in the manuscript.—T. W.S8. 
282 
