130 Dr. M. Laurie on the 



Subfam, 2. Vi:jorijyi=Yepvoidse, Thov., + ScorpiopSf 

 AnurocfonuSj and Hadruroides. 



Vejovis, Scorpiops, Anuroctonus, Hadrurus, (Hadruroides). 



The lung-book lamellse in this subfamily are spinous along 

 the margin. The ovaries of Anuroctonus and Hadrurus have 

 not been seen. 



Fara. III. Chactidse = CAacit/ii, Poc. 

 Apoikogenic forms with large yolky Qgg. 



Subfam. 1. EuscoBPiiNi. 

 Euscorpius. 



Arcade structure of lung-book lamellae. 



Subfam. 2. Chactini= Chactini, Tocock, — Euscorpius. 



[CTiactas)y (Hadrurochactas) ^ [Heterochactas) , [Teuthraus- 

 tes)y Broteochacfas, Broteas. 



Spinous margin to lung-book lamella?. 



It is quite possible, though I do not think very probable, 

 that further light on the development may tend to associate 

 the Euscorpiini and lurini as against the Chactini and Vejo- 

 vini. This would seem to be making the structure of the 

 lung-books of greater importance in this case than the mode 

 of development. 



Fam. IV. Bothriuridse, Sim. 



BotJiriurus, (Brachistosternus) , [Mecocentrus) ^ Gercoplionius^ 

 {Timogenes) ^ [Thestylus)^ [Urophonius), [Fhoniocercus), [Cen- 

 tromachus) . 



I have only seen the ovary of Bothriurus and the lung- 

 books of that species and Cercophonius. The eggs are large 

 and spherical and the lung-books spinous. 



I have some doubts as to whether this family and the 

 Chactini ought not to be united. The shape of the sternum 

 seems not to be so reliable a test of affinity as used to be 

 supposed. 



