PART 1

of 2) +----------------+-----------------------------------------------+-------+ | | Number of Genera which are found | | | | | | | NAMES OF +------+-------+------+--------+------+---------+ Total | |CLASSES, ORDERS,|In the|Living |In the| In the |In the| In the |number | | OR FAMILIES. |living| and |Fossil| Strata |Strata| Strata | of | | |state |Fossil.|state |anterior|of the|posterior|Genera.| | |only. | |only. | to the |Chalk.| to the | | | | | | | Chalk. | | Chalk. | | +----------------+------+-------+------+--------+------+---------+-------+ |Polyparia, | 23 | 30 | 52 | 47 | 19 | 36 | 105 | |Stellaridæ, | | 4 | | | 2 | 4 | 4 | |Echinidæ, | 2 | 6 | 3 | 7 | 8 | 5 | 11 | |Annulosa, | | 2 | 1 | 1 | 1 | 2 | 3 | |Serpulacea, | 2 | 3 | 1 | 3 | 3 | 3 | 6 | |Cirripeda, | 8 | 2 | | 1 | | 2 | 10 | |Tubicolæ, | 1 | 3 | 2 | | | 5 | 6 | |Pholadaria, | | 2 | | | | 2 | 2 | |Bivalve shells, | 18 | 61 | 24 | 44 | 25 | 51 | 103 | |Univalve shells,| 33 | 87 | 28 | 27 | 16 | 93 | 148 | |Genera little | | | 4 | 3 | 1 | | 4 | | known, | | | | | | | | |Crustacea, | | 21 | 5 | 5 | 2 | 9 | 28 | |Pisces, | | 54 | 6 | 11 | 2 | 55 | 60 | |Mammifera & | | 24 | 12 | | | 36 | 36 | | Cetacea, | | | | | | | | |Aves,(a) | | 3 | | | | 3 | 3 | |Reptilia, | | 4 | 4 | 3 | 2 | 4 | 8 | |Insecta, | | 14 | | | | 14 | 14 | |Vegetabilia, | | 14 | 10 | 12 | 1 | 15 | 24 | +----------------+------+-------+------+--------+------+---------+-------+

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