117 



a whitish substance which is oxy-terephthalic acid, C 8 H G 0'. This 

 acid is a substance of great interest, and its preparation offering much 

 less difficulty than the analogous oxy-acids of the aromatic series, it 

 affords an opportunity of studying to a fuller extent the nature of this 

 class of acids, especially as it may be expected that the history of this 

 acid will throw some light on the law of polybasicity. Oxy-tere- 

 phthalic acid forms beautiful crystalline salts, which are less soluble 

 than the corresponding terephthalates. The neutral ethers are liquid. 

 The chloride of oxy-terephthalyl is likewise a liquid readily decom- 

 posed by water and alcohols. 



II. " Notes on the Generative Organs, and on the Formation of 

 the Egg in the Annulosa." Part I. By JOHN LUBBOCK, 

 Esq., F.R.S. Received February 5, 1861. 



(Abstract.) 



In the present paper I have communicated some observations on 

 the Myriapoda, on Petrobius, and on certain Arachnida. Among 

 the former I have examined species belonging to the genera Glomeris, 

 lulus, Polydesmus, Lithobius, Cryptops, Geophilus, and Arthrono- 

 malus. Through the labours of Brandt, Fabre, Newport, Stein, 

 Treviranus, and other eminent naturalists, we are tolerably well 

 acquainted with the anatomy of the generative organs in the 

 Myriapods ; but these observers have occupied themselves principally 

 with the arrangement and forms of the organs, and have not paid much 

 attention to the different stages of egg-development, nor to the rela- 

 tion in which the young egg stands to the surrounding tissues. This 

 relation is indeed very curious, and seems to have been generally 

 misunderstood. It is well known that there are in the Myriapods 

 no long egg-tubes, as in most insects, but that each egg arises in a 

 separate follicle. It was, however, natural to suppose that this follicle 

 held the same position with reference to the ovary as the very similar 

 egg-follicles of certain insects, as, for instance, of Coccus. This, 

 however, is by no means the case. If we compare the ovary and 

 egg-follicle of Coccus with the ovary and egg-follicle in Glomeris, we 

 shall see that the egg-follicle is very much alike in both cases : the 



VOL. XI. K 



