From this an equally slender tube proceeds, which joins its fellow of the opposite side, and the two form a thick, walled tube, which opens on to the exterior within the bursa copulatrix through which the penis protrudes.
The fossil plants which are found in the upper beds of the preceding Devonian system are so closely related to those in the Lower Carboniferous, that from a palaeobotanical standpoint the two form one indivisible period.
These latter two form part of the managing technology content of the course and involve investigating footwear materials and footwear manufacturing.
The two form an unlikely friendship, and she becomes an apprentice sleuth.
The two form the central focus of the Cullen family that includes Esme, Rosalie, Jasper, Alice and Emmett.