+----------+-------------+--------------+-----------------+-------------+ | | Rock |Pouter, | Tumbler, | Bussorah | | | Pigeon. |from Mr. Bult.| Dutch Roller. | Carrier. | +----------+-------------+--------------+-----------------+-------------+ |Cervical | | | | | |Vertebræ | 12 | 12 | 12 | 12 | | | | | | The 12th | | | | | | bore a | | | | | | small rib. | |Dorsal | | | | | |Vertebræ | 8 | 8 | 8 | 8 | | | | | | | |Dorsal | | | | | |Ribs | 8 | 8 | 7 | 7 | | |The 6th pair |The 6th & 7th | The 6th & 7th |The 6th & 7th| | | with | pair with | pair without |pair without | | | processes, | processes. | processes. | processes. | | |the 7th pair | | | | | | without a | | | | | | process. | | | | | | | | | | |Sacral | | | | | |Vertebræ | 12 | 14 | 11 | 11 | |Caudal | | | | | |Vertebræ | 7 | 8 or 9 | 7 | 7 | | +-------------+--------------+-----------------+-------------+ |Total | | | | | |Vertebræ | 39 | 42 or 43 | 38 | 38 | +----------+-------------+--------------+-----------------+-------------+ The _pelvis_ differs very little in any breed. The anterior margin of the ilium, however, is sometimes a little more equally rounded on both sides than in the rock-pigeon, The ischium is also frequently rather more elongated. The obturator-notch is sometimes, as in many tumblers, less developed than in the rock-pigeon. The ridges on the ilium are very prominent in most runts.