Template:SchulteTilney1915 table1
From Embryology
| Prior to the appearance of somites | Nos. 5129, 400.456. 550. 555 |
| One pair of mesorlermic somites | Nos. 554. 594 |
| Two pairs of mesodermic somites | No. 539 |
| Three pairs of mesodermlc somites | No. 593 |
| Four pairs of mesodermlc somites | No. 409 |
| Seven pairs of mesodermic somites | Nos :587. 588 |
| Eight pairs of mesodermlc somites | No. 530., 586 |
| Nine pairs of mesodermlc somites | No. 531 |
| Ten pairs of rnesodermic somites | Nos. 476, 532 |
| Twelve pairs of mesodermlc somites | Nos. 534, 547 |
| Thirteen pairs of mesodermlc somites | No. 86 |
| Fourteen pairs of mesodermlc somites | Nos. 188, 548 |
| Sixteen pairs of of mesodermlc somltes | No. 551 |
| Seventeen pairs of mesodermlc somites | No. 568 |
| Nineteen pairs of mesodermlc somites | No. 502 |
| Twenty-one pairs of mesodermic somites | No. 558 |
