1008 MR. L. R. CUAAVSHAY ON THE ARTERIAL [DeC. 11, 



The jaws bear a single row of distinct blunt denticles, set at 

 some distance from one another. Some of them show ti'aces of 

 bifurcation at the tip. 



As Farran has observed [l. c. p. 331), this species seems to be 

 a Hervia, although Bergh (System, p. 1032) suggested it might 

 be a synonym of Facelina rubroiutiata. But both the description 

 and figure of Alder and Hancock rej)resent the rhinophores as 

 smooth. 



DoRiDOPSis and Doriopsilla. 



An error occurs in the numbei'ing of the figures representing 

 these genera on Plate XLVII. of my previous paper, as published 

 in the Society's ' Proceedings,' although the numbers are correct 

 in the copies printed separately. Numbers 4 and 5 should be 

 transposed ; that is to say , the lower figure represents Doridopsis 

 nigra and should be numbered 5, Avhile the upper figure repre- 

 sents Doriopsilla miniata and should be numbei'ed 4. 



7. On Variations in the Arterial System of certain Species 

 o£ the Anura. By Lionel R. Crawshay, M.A.* 



[Received October 22, 1906.] 

 (Text-figures 143-155.) 



In the original and subsequent editions of Eckei''s and 

 Wiedersheim's ' Anatomie des Frosches,' the species employed 

 for investigation were exclusively Bana escidenta Linn, and Rana 

 temporaria auct., and particularly the foimer. The species 

 R. cateshiana Shaw and R. silvatica Leconte were also, it is 

 stated, examined by Ecker for comparison, but no reference is 

 made to them in the text. Besides the j^ortion of these works 

 devoted to the subject, which has been so greatly extended by 

 Gaupp in the last edition, there is, so far as I am aware, no other 

 published record dealing with the general arterial system of the 

 Anura, so tha,t the work, it would seem, ha.s so far been practi- 

 cally confined to the two first-named species. While working a. 

 short time ago, by the kindness of Mr. Beddard, at the Pro- 

 sectorium of the Zoological Society's Gai-dens, I was very greatly 

 indebted to him for enabling me to examine, in addition to the 

 above named, certain other species of the Anura, in some of which 

 a considei'able portion of the ai-terial system was worked out in 

 detail. These comprised single sjoecimens of Rana cateshiana 

 Shaw, R. tigrina Daud., R.hexadaciyla Less., Biifo horeas B. & G., 

 and B. mauritanicits Schleg., and two specimens of Rana clamaia 

 Daud. 



It is true that the extent of variation, sometimes even in 

 important points, to which the arteries ai'e liable in individuals 



* Communicated bj- F. E. Beddard, M.A., F.R.S. 



