ANIMALS or DOUBTFUL SITUATIOX. 305 



ARTICULATED ANIMALS 



having articulated Legs, of doubfjul Situation. 



The singular animals that compose this group inhahit the sea. 

 The females are furnished with two palpiform organs inserted at the 

 hase of the rostrum, on which parts they carry their eggs, attached 

 in globular masses. 



The legs are composed of three-jointed coxee, one-jointed thighs, 

 two-jointed tibiae and tarsi, the latter part furnished with claws. 



Order PODOSOMATA. 



Boilj/ four-jointed, and foniied as it were of the junction of the coxre : 

 viouth tubular: ei/es four, placed on a common tubercle : kga eight. 

 The natural situation of this assemblage of animals is still doubt- 

 ful, as very little is known concerning them : they were referred to 

 the Arachnoida by Dr. Leach, in Brewster s Edin. Encycl. vol. vii. 

 and also in the article Annulosa in the Supp. to Encycl. Brit. vol. i.; 

 since which time, from a further examination of their characters, 

 he is by no means satistied as to their position. 



Fam. I. PYCNOGOxiDiE. Leach. 

 Mandibles none. 



Genus 1. PYCNOGONUM of authors. 



Legs rather strong : coxa; with subequfil joints : tibia with the first joint 

 largest : tai-si with the first joint very small : clazos simple, strong, 

 acute. 



Egg-bearing organs ten-jointed, the last joint very acute, ungui- 

 form, attached to the first joint of the body at the base of the ros- 

 trum. 



Sp. 1. Pyc. Balanurum. Fabr., Latr., Leach, Edin. Encycl. — Supp. to 

 Encycl. Brit. vol. i. pi. 23. Trans. Linn. Soc. xi. 388. 



Inhabits the European ocean. It is not uncommon in Plymouth 

 Sound, where it is taken by the trawl fishers. 



Genus 2. PHOXICHTLUS. Latr., Leach. 

 Legs very slender : coxa with the middle joint longest, subclavate : 

 /ifciVewith the first joint shorter: tarsi with the first joint very small : 

 ckavs double, unequal, the longer one acute. 



Egg-bearing organs seven-jointed, the last joint tuberculiform, in- 

 serted at the base of the rostrum, one on each side, and attached to 

 the first segment of the body. 



u 



