376 Miscellanea Zooloyica. 
mentary ; anus terminal Marine : oviferous, carrying the eggs in 
masses attached to the spurious legs. The genera are 
I. Pycnogonum. Rostrum without mandibles and palpi ; legs 
stout, the first tarsal joint minute, the claws simple ; oviferous legs 
10-jointed, the terminal joint claw-like. 
II. Phoxichilus. Rostrum without mandibles and palpi; legs 
slender, the first tarsal joint minute, the claws double, unequal, 
sharp ; oviferous legs 7-jointed, the terminal joint tubercle-like. 
III. Orithyia. Rostrum sessile with a pair of chelate mandibles ; 
palpi ; legs slender, monodactyle, the firsi tarsal joint minute ; 
oviferous legs 5-jointed, the terminal joint claw-like. 
IV. Pallene. Rostrum raised on a neck, with a pair of chelate 
mandibles; palpi ; legs slender, monodactyle, with auxiliary claws, 
the first tarsal joint minute ; oviferous legs 10-jointed, the terminal 
joints serrulated. 
V. Nymphon. Rostrum raised on a neck, with chelate mandi- 
bles and palpi ; legs slender, monodactyle, with auxiliary claws, the 
tarsal joints sub-equal ; oviferous legs 10-jointed, the terminal joint 
claw-like. 
I. PYCNOGONUM,* Brunnich. 
1. P. littorak. (Plate xii. Fig. 1, 2, 3.) 
Phalangium Balaeriarum, Lin. Syst. 1028. Mull Zool. Dan. prod. 192, 
No. 2294. Pen. Brit. Zool. iv. 43, pi. 19, fig. 7. Turt. Gmel. iii. 716. 
Stew. Elem. ii. 326, (the description very inaccurate.) Acarus marinus 
seu Polygonopus, Pallas, Misc. Zool. 188, tab. 14, fig. 21-23 Pycno- 
gonum littorale, Fabr. Faun. Groenl. 233 P. Balaenarum, Latr. Gen. 
Crust, et Ins. i. 144. Leach, in Edin. Encyclop. vii. 413, pi. 221, fig. 
11. Lin. Trans, xi. 388. Sam. Ent. Comp. 305. Lamarck, Anim. 
s. vert. v 76. Savig. Mem. sur les Anim. s. vert. i. 112, pi. 5, fig. 3. 
Stark, Elem. ii. 203. Cancellus belgicus, Walker's Essays on Nat. 
Hist. 215. 
HAB. Under stones and amongst sea weeds at low- water markj and amongst 
corallines in deeper water. " On many parts of our coasts, but is not common," 
Leach. Frequent on the coast of Berwickshire. 
DESCRIPTION. ^4?zzw/araneiform, of a yellowish-brown colour, 
naked, finely granulous, the granules almost even with the surface : 
rostrum paler, smooth, thick, conical with a slightly dilated cylin- 
drical apex and trifid aperture,t two thirds the length of the body, 
porrect or deflected : cranial segment coalescent with the next, not 
produced anteriorly, the back with a large tubercle on which the 
* Name from WMOS thick, and yovu a knee. 
f Dr Walker says the mouth " consists of an aperture with four valves." 
