486 bisect a Myridpoda found in Berwickshire, 



[Mr. Brightwell has sent us wilh this communication 

 drawings in illustration of it. They represent : — A young 

 lobster protruded from the egg : natural size. — Young 

 lobster just hatched; natural size. Magnified view of the 

 last. The large claw magnified. — Young crawfish : natural 

 size. Magnified view of the same. The egg : natural size. 

 The tail. The legs. — We have omitted to have the drawings 

 engraved, because they exhibit the objects upon too small a 

 scale, and too indistinctly, to enable the engraver to produce 

 figures from them that would be deemed much relevant to 

 the questions on which they are cited. This is the opinion 

 of a crustaceologist who is engaged in the study of these 

 questions, and who has offered to dissect specimens of the 

 youthful states of the lobster, and to delineate their structure, 

 for exhibition in this Magazine, if Mr. Brightwell will be so 

 kind as to supply specimens.] 



Art. III. A descriptive Catalogue of the Insecta Myriapoda found 

 fa Berwickshire. By George Johnston, M.D., Fellow of the 

 Royal College of Surgeons of Edinburgh. 



MYRIATODA. 



(Leach, in Zoological Miscellany, iii. 31. &c. ; Latreille, in Cuv. Reg. 

 .Anim., iv. 326.) 



Obs. The insects included in this small class are well known by the name 

 of " Meggy-many -feet," in Berwickshire and in all the south of Scot- 

 land. 



Order I. Chilo'gnatha. Antennas 7-jointed : legs short : body generally 

 crustaceous. (The motions of the species are slow ; and they feed on 

 decayed vegetable matter.) 

 » * Legs sixteen pairs. 



1. Glomeris. Body oval, arched, contractile into a globe : eyes distinct. 



** Legs numerous. 



j- Body serpentiform, spirally contractile : eyes distinct. 



2. Zulus. Segments cylindrical; antennas with the second joint longer 

 than the third. 



3. Oaspedosoma. Segments subcylindrical, the sides protuberant : antennae 

 with the second joint shorter than the third. 



•f +/ Body linear-depressed, spirally contractile : eyes obsolete. 



4. Polydesmus. Segments laterally compressed, margined. 



Order II. Sy'ngnatha. Antennae composed of 14 or more joints : legs 

 elongated : body depressed, coriaceous or membranaceous. (The species 

 creep with rapidity, and are carnivorous.) 



5. Lithobius. Legs 15 pairs, the hinder longer than the others ; antennae 

 setaceous with numerous joints. 



6. Geophilus. Legs many pairs, the hinder not distinctly longer than the 

 others : antennas somewhat filiform, with_l 4 joints. 



