After that (the thing aforementioned).
The little dog was off like a shot, and the children went running thereafter.
This structure is not, as it seems at first sight, a papilla, but forms a ridge crossing the ventral aspect of the worm. Caudad of this prominence the bursa begins. The first ray (Fig. 67), long and thin with a characteristic curve, has its papilla on the external surface of the bursa. It obviously represents the prebursal papilla of those bursate nematodes which possess one. The next ray is equally long but wider. It arises at a slight distance from the first, approaches it and then diverges somewhat again. It is split for half its length only, the more cephalad part being the thinner, and the two papillæ in which it ends lying on the inner surface of the bursa. It is obviously the ventral ray with incomplete sub-divisions. The next three rays are quite obviously the three lateral rays. They lie nearly in apposition with incurved points, the most cephalad ending on the outer surface of the bursa, the other two on its inner surface. The externo-dorsal ray is long and thin, taking off from the main stem of the dorsal ray 0·15 mm. from its base, and ending on the outer surface of the bursa. At a point 0·25 mm. from the beginning of the dorsal ray it divides into its two main branches. These diverge gradually at an acute angle and then approach more abruptly, running thereafter side by side to diverge slightly at their tips. The total length of the dorsal ray is 1·7 mm. Viewed from the side it bends abruptly ventrad soon after giving off a small branch, which it does at a distance of 0·3 mm. from the base of the externo-dorsal ray, and then bends as abruptly into its original caudad direction.