Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 655
n of external whorl; b, one of the outer row of chambers;c, c, whorl invested by a; fZ, one of the chambers of the fourthwhorl from the margin; e, e, margiual portions of the enclosedwhorls : /, investing portions of outer whorl; g, g, spaces leftbetween the investing portion of successive whorls;… … Portion of a thin Section of NummuUna Icevigata, taken unathe direction of the preceding, highly magnified to show theminute structure of the shell:—a, a, portions of the ordinaryshell-substance traversed by parallel tubuli; 6, 6, portionsforming the marginal cord, traversed by diverging and…
Microscopy · Biology
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