ction to the others, "i when one or more pairs have disappeared, mi that 



be understood, now .1- the first, now as the second, third, or fourth pair of the 



the imago. The greatest drawback by Dohrn's way of designation is to me that 



with the developmental history, the embryonal legs (fig.2 6, c) not being 



Ithough thej are not to be regarded as the predecessors of the two foremost pairs ol 



neither the predecessors of the second and third typical pairs ol 



limbs of the imago, the imagiual fore-limbs, 01 oi the palpi and the ovigerous legs. I hope that it 



will appeal from mj examination of the larval development that these 1 pairs of limbs are not 



identical with, the embryonal legs, to which examination th eader is referred. 



Now, it the embryonal legs are neither identical with the two first pairs of ambulatory legs (Kroyer), 



imr with the palpi and ovigerous legs (Dohrn's Extrem.Il and IIIi, there will be typically 9, and 



7. pairs of limbs, as supposed by Dohrn and all naturalists, excepting Semper, Pycnog. und 



Larveni, [874 (who lias 8 pairs). Even if it be supposed that the embryonal legs are peculiar limbs, 



it would, of course, be possible to use the appellation of Dohrn, the list of limbs then only being 



increased from VII to IX; but on the other hand it would be very untoward to be always obliged to 



subtract several, sometimes more than the half, from the number, which is got b) adding the embry- 



' 



r. 

 e*. 



o. 

 cl. 

 apo. 



cK 



ci. 



sc. 

 pel. 



clif. 



s. 



eh. 



plm. 



dim. 



dm. 



pa. 



cxi. 



/■ 

 ft'. 



/a'. 



.'.;■'. 



pip, 



po. 

 pi,: 



Proboscis rostrum). 



First segment of trunk (segmentum corporis prinium). 



Oculiferous tubercle (tuber ocular 



Neck (collum). 



Lateral process of the En aent for the insertion 



of the ovigerous legs (protuberantia pedis oviferi - 



nd segment of trunk segmentum corporis secun- 

 dum . 



Third segment of trunk (segmentum corporis tertium), 

 th segment of trunk (segmentum corporis quar- 

 tuim. 



Cauda] segment segmentum caud 



Lateral process of the body for the insertion of the 



anibulaton U -- i processus corporis lateralis). 

 Cheliforus (cheliforus . 



Scape sea]. Us . 



Chela, 1 11 1 land 1 tiela v. manus). 



Palm (palma . 



Immovable finger acumen v. digitus immobilis). 



Movable Emgei pollex v. digitus mobilis), 



Ambulator} legs pes ambulatorius . 



First coxal joint (articulus coxalis primus). 



coxa! joint (articulus coxalis secundus 

 Third coxal joint articulus coxalis tertius). 

 Femoral joint (femu 

 First tibial joint (articulus tibialis pi 



nl tibial joint (articulus tibialis alt 

 First tarsal joint articulus tarsalis prioi 

 Second tarsal joint (articulus tarsalis alter). 

 Claw (unguis . 



Auxiliary claw (unguiculus auxiliai 

 Palpus palpus Ipiformis 



i rvigerous leg (pes ovifi 

 Terminal part of the ovigerous leg (pars terminalis 



pedis ovifi ri 

 Egg-globe globus ovorum). 



