ENTOMOLOGICAL MAGAZINE. 



APRIL, 1834. 



Art. X. — Abstract of M. Straus-Durckheini s " Coiiside- 

 rations Generales sur VAnatomie Comparee des Animaux 

 Articules." By Edward Doubleday, Esq. M. E. S. 



{Continued from Vol.1, puge 479.) 



" Non eram nescius ut hie noster labor in varias reprehensiones incurreret, 



si delectamur cum scribimus, quis est tam invidus qui ab ese nos abdu- 



cat ? ; sin autem laboramus, quis est qui alienae modum statuac iudustriae ? " — 

 Cicero. 



Part II.— Muscular System. 



Muscles in General. 



In the Annulosa and Annelida, the muscles are composed, 

 like those of vertebrated animals, of two parts ; the one, the 

 muscle properly so called, which is contractile ; the other, the 

 tendon, not contractile. But, as we cannot separate these parts 

 without destroying the muscle, it becomes necessary to describe 

 them together: some general remarks may nevertheless first 

 be made upon each separately. 



Tendons. 



The tendons of articidated animals possess a greater degree 

 of solidity than those of Vertebrata. This is owing to the 

 presence of a larger proportion of calcareous matter: they 

 differ but little from the internal apopMjses of the integuments, 

 except in the direction of their fibres, which is always either 

 longitudinal or radiating, according to the form of the tendon ; 

 they are also of a closer texture. 



NO. II. VOL. II. r 



