130 Dr. M, Laurie on the 



Subfam. 2. F^jo FJJv/=Vejovoiclge, Thoi:, + Scorpi'ops, 

 Anurocfonus, and Hadruroides. 



Vejovis, Sco7'pio2:)Sy Anurocfonus, Iladrurus, {Hadruroides). 



The lung-book lamellse in this subfamily are spinous along 

 the margin. The ovaries of Anuroctonus and Hadrurus have 

 not been seen. 



Fam. III. Chactidae=(7/iac<mi, Poc. 

 Apoikogenic forms witli large yolkj Q(^g. 



Subfam. 1. EuscoRPiiNi. 

 Euscorpius. 

 Arcade structure of lung-book lamellge. 



Subfam. 2. Csactini^ Chactini, Pocock, — Euscorpius. 



{Chactas), (Hadrurochactas) , {Heterochactas) , [Teuthraus- 

 tes), BroteochacfaSj 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. 



Bothriurus, {Brachi'stosternus), {Mecocentrus), Cercophonius, 

 (Timogenes) , [Thestylus), {Uropho7iius), {Phoniocercus), {Geri- 

 tromachus) . 



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

 books of that species and Gercophonius. 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. 



