376 Miscellanea ZooJogiCd. 



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. 



I. P. littorale. (Plate xii. Fig. 1, 2, 3.) 



Phalangium Baleenarum, 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. surles Anim. s. vert. i. 112, pi. 5, fig. 3. 



Stark, Elem. ii. 203 Cancellus belgicus, Walker's Essays on Nat. 



Hist. 215. 



H ab Under stones and amongst sea weeds at low- water mark ; and amongst 



corallines in deeper water. " On many parts of our coasts, but is not common," 

 Leach. Frequent on the coast of Berwickshire. 



Description. Animal zxnneiioxm, 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, + 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 twkvoc thick; and yovu a knee. 



■J- Dr Walker says the mouth " consists of an aperture with four valves." 



