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. 



