478 ME. G. A. BOULENGER ON SOUTH-AFRICAN [May 28, posterior part of the duct tJiat Gliuther speaks of an annular lining. The function of the folds, which, in all probability, is to pass along the sj)erms, and possibly at the same time to unite them into bundles, could scarcely be effective, however, if the folds were annular. The lumen of the left vas deferens, which Giinther found to be better developed than the right in one specimen, is very iri-egular in diameter in my specimen. At its widest the duct is about 5 mm., but where narrowest it only allows the passage of a bristle. One of the males examined has two abdominal pores (text-fig. 139 A, A.P., R.A.P.), of which the right is the better developed. This condition differs from that described by Giinther (3. p. 4), in which the left pore only was present. A Vestigial Seventh Branchial Arch. Three specimens were dissected to determine if there were any trace of a seventh arch. Traces were found in two of the specimens, one of which was not quite full-grown. The remnants in the smaller specimen consist of four small pieces of cartilage on one side and two on the other. These lie close to the cerato-branchial of the sixth arch, on the posterior side, nearer its median extremity. In the adult specimen in a similar position there are two pieces, the larger of which equalled in length the combined four pieces found in the smaller specimen. Bihliogra'phy . 1. Garman, S. — " Chlamydoselachus anguineus (Gar.) — a Living Species of Oladodont Shark." Bull. Mus. Comp. Zool. vol. xii. no. l.p. 1. 1885. 2. GiJNTHER, A. — Chlamydoselache angidnea. ' Challenger ' Re-ports, vol. xxii. 1887, p. 2. 3. Parker, T. J. — "On the Intestinal Spiral Valve in the Genus Raia." Proc. Zool. Soc. 1880, p. 49. 2. Second Report on the Batrachiaus and Reptiles collected in SoLitli Africa by Mr. G. H. B. Grant, and presented to the British Museum by Mr. C. D. Rudd. By G. A. BoULENGER, F.R.S., V.P^Z.S. [Received May 3, 1907.] (Plates XXI. & XXII. * and Text-figures 140, 141.) Since the publication in these ' Proceedings,' two years ago (P. Z. S. 1905, ii. p. 248), of an annotated list of the Batrachians and Reptiles collected by him, Mr. Grant has continued his exertions in the same department, making collections in the following localities : — I. Cape Colony. Knysna, 50 miles east of Mossel Bay. II. Xatal. Illovo, 30 miles S.W. of Durban. * For explanation of the Plates, see p. 487.
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