Kkw — A Synopsis of the Palse-Scofpions of Britain and Ireland. 39 



with sternal elements obliterated ur ahnuHt ubliteiatecl,' maxillae and coxae 

 meeting or almost meeting in median line. Abdomen joined to cephalo thorax 

 without constriction; somites 12, the first (prae-genital) with fidl-sized 

 tergite; sterna of somites II. and III. comprising the genital-area; those of 

 III. and IV. carrying the tracheal spiracles (2 pairs) ; somite XII. greatly 

 reduced, forming when extended a minute prae-anal " tail." Coitus unobserved. 



1. Serrula fixed throughout . . . . . Panctenodadyli. 



2. Serrula free distally Hemidenodactyli.^ 



I. Panctenodadyli. 



Chelicerae small ; serrula fixed throughout ; lamina exterior and galea 

 always present. Cephalothorax without anterior median process or marginal 

 serration ; frequently with a groove marking off head from thorax, and often 

 another limiting the two thoracic somites. Abdominal somite XI. usually with 

 separate tergite and sternite. 



(Head marked off from thorax, and tergite-sternite XL separate in 

 all Britannic forms ; in these the lamina interior is in most part plate-like ; 

 maxillae and coxae with ventral face in same plane ; cephalothorax always 

 rounded or narrowed in front ; most or all abdominal tergites with median 

 division ; body more or less flattened, with dermo-skeleton somewhat solid, 

 (TPnprallv rlnll and heavilv sculntured, rarely polished ; Jbristles never all 



th well-separated 

 with longer pars 

 ERRATUM. 



Page 50, line 14. For " tergites " read " sternites ". ' ^^''^^V'^''- 



Cheiridmm, 



sphalothorax with 

 or without grooves marking off head and thoracic somites. Abdominal somite 

 XI. with tergite always visible fronr above ; somite XII. terminal. Bristles a 

 little curved or straight, clavate, toothed or nearly simple. Eyes or 2, near 



I Cf. Lankester (61), p. 25.5. 



- Panctenodactyli and Hemictenodactyli, Balzaa 1S91 (41), are well-marked divisions in a small 

 fauna like ours ; less so when Garypidae are considered ; they are scarcely sub-orders. Cf. 

 Hansen (43), p. 230 ; "With (C6), p. 54 ; Hirst (97), p. 106. 



^ The remaining families of Panctenodactyli, Garypidae and Feaellidae are 4-eyed; femur of 

 legs I. generally with longer pars basalis and shorter pars tibialis ; in Garypidne all '.-irsi 'J-jointed, 

 in Feaellidae 1 -jointed. 



[F2] 



