author's abstract of this paper issued 

 by the bibliographic service, february 27 



THE COMPARATIVE MORPHOLOGY OF THE SECOND- 

 ARY SEXUAL CHARACTERS OF HOLOCEPHALI 

 AND ELASMOBRANCH FISHES 



THE CLASPERS, CLASPER SIPHONS, AND CLASPER GLANDS 

 MEMOIR V 



W. HAROLD LEIGH-SHARPE 



London, England 



NINETEEN FIGURES" 



The preceding memoirs appeared in the Journal of Morphology 

 as follows: Memoir I, volume 34, page 245, 1920, Scyllium catu- 

 lus, S. canicula, Acanthias, Raia circularis; Memoir II, volume 35 

 page 359, 1921, Galeus, Mustelus, Lamna, Rhina; Memoir III, 

 volume 36, page 191, 1922; Fossil forms; Memoir IV, volume 

 36, page 199, 1922, Chiloscyllium, Pristiurus, Chimaera, Callo- 

 rhynchus. Torpedo, Trygon, Myhobatis, Rhinobatus. The present 

 paper deals with certain species to which I have kindly been 

 allowed access at the Natural History branch of the British 

 Museum, South Kensington, London, viz.: 



Notidanus griseus 222 



Spinax niger 225 



Centrophorus lusitanicus 227 



Echinorhinus spinosus 228 



Cestracion philippi 229 



Pristiophorus cirratus 230 



Rhinochimaera atlantica 232 



Chimaera colliei 234 



Chimaera mirabilis 236 



Raia clavata 236 



Raia blanda 243 



1 The figures are specially drawn from the author's dissections and prepara- 

 tions by Miss Edith C. Humphreys, to whom best thanks are tendered. 



221 



