G6 Miscellaneous. 



Fardosa, Phlei/ra, Heliojihanus. Three other genera examined 

 came from eggs found under stones without the adult females. 



My results differ in certain points from those obtained by Clapa- 

 rede for Li/cosa. The ramifications of the aorta are indeed such aa 

 were observed by this author, but the recurrent branch arising from 

 the cephalic arteries conducts the globules into a lacuna occupying 

 the median portion of the u])per face of the cephalothorax, and 

 wdiich is not, as was supposed, an actual gutter ; the globules which 

 circulate in it from the front towards the rear, returning from the 

 ophthalmic lacuna?, form a sort of sheet spread out beneath the 

 integument ; then, overHowing at the sides without following any 

 definite route, they unite with the currents which skirt the lateral 

 portions of the cephalothorax. In the Saltigrad^e, in which the 

 latero-posterior eyes are veiy large and placed well behind the 

 others, the globules which have circulated round these eyes arrive 

 at the central lacuna by following real gutters. Between the 

 median anterior eyes globules are observed to penetrate between 

 these organs to guin the sternal face of the cephalothorax. 



In young spiders which have already undergone the first ecdysis 

 and are still transparent other ramifications of the cephalic arteries, 

 not remarked by Claparede, may be observed in the cephalothorax. 

 These canals, which communicate with the recurrent branch of the 

 cephalic artery, of which mention has been made above, carry the 

 globules back towards the posterior portion of the cephalothorax ; 

 at certain points of their course globules may even be observed as 

 they rise from the depth of the organs. The arrangement of these 

 canals is the same in all the genera studied, except in the Salti- 

 grada3, where it is slightly different. The appearance of these 

 ramifications, which do not exist immediately after the animal is 

 hatched, is highly interesting, since it shows that if, in consequence 

 of the exclusive study of young spiders, the arterial system of these 

 creatures has been considered as being very slightly ramified, it is 

 nevertheless susceptible of complication and of attaining in the adults 

 the development which the researches of M. Blanchard, confirmed 

 by those of M. Schneider, have demonstrated. 



In the appendages the globules of the arterial current follow one 

 another in naiTow file. The venous current is broader and forms a 

 sort of sheet beneath the integument on the extensor side ; it may 

 be temporarilj' subdivided by muscular masses. 



In all the genera which I examined I found the sternal branches 

 of the pedal arteries, which open into the transverse sternal lacunse. 

 In the median sternal lacuna the globules come from the deep 

 parts chieflv through a sort of notch, corresponding to the interval 

 between the second and third pairs of limbs. Of these globules 

 some go towards the rear, and the rest towards the front, to empty 

 themselves at last into the transverse lacunae and rejoin the venous 

 currents returning from the appendages upon the sides of the thorax. 



It seems, moreover, that the route followed by the globules of the 



