Vll 



Plate 

 XXX. 

 XXXI. 



XXXII. 



XXXIII. 



XXXIV. 

 XXXV. 



Diagrams illustrating the structural peculiarities of the Periguathic 

 Girdle of the Echinoidea, as described by Prof. Duncan. 



Strongylus Axei, Anatomical details of, accompanying Prof. 

 Cobbold's description of. 



Slavina, species of, as demonstrated by Mr. E.G. Bousfield. 



Glyciphagus platygaster and G. dispar, their sexual distinctions 

 and anatomy, illustrating Mr. Michael's paper on undescribed 

 Aeari. 



XXXVI. Strongylus Arnfieldi and S. tetracanthus, their anatomical cha- 

 racteristics and development, as observed by Prof. Oobbold. 



New Species of Ceylon Entomostraca described in Prof. G. S. 

 Brady's paper thereon. 



African CuRCunoNiDiE, illustrations of new species characterized 

 by Mr. Pascoe. 



