698 RIMTISH ORIBATID^. 



very conspicuous, appears to me to be one of the most 

 convincing arguments, beyond the actual facts of dis- 

 section, to prove that my view is correct that these 

 structures are not stigmata but are sense organs, 

 which are as requisite to the nymph and larva as to 

 the adult. 



Lamella of the Adult. 



Since the publication of vol. i I have received from 

 Mr. M. J. Michael some specimens of a minute Oribata 

 collected in Switzerland, and I believe unrecorded. In 

 this species the coalescing of the inner edges of the 

 large horizontal lamellae, noticed at p. 123 of vol. i, as 

 found in 0. quadricomuta, 0. tecta, 0. punctata, &G.f is 

 not confined to the hinder parts of the lamellee, as in 

 those species, but is continued to the front, forming a 

 flattish expansion, the anterior edge of which is rounded; 

 and this resembles what Nicolet describes as a tectum 

 in a far greater degree than anything which exists in 

 any species mentioned in Nicolet's work does : indeed 

 at first it might probably be considered as answering 

 to a considerable part of his description ; but that it is, 

 after all, only a coalescing of the lamellae is proved by 

 the facts that there are not any upturned edges to the 

 expansion, nor any other lamellae, and that the lamellar 

 hairs are on the flat of the expansion. 



The species not being British I have not dealt with 

 it in this book, but I have thought it well to mention 

 the above facts. 



The Mouth-Organs of tue Adult. 



It has struck me in reading over Chapter IX of this 

 work that the position of the less important mouth- 

 organs is not made quite as clear as it might be, and 

 that one of them, the epipharynx, is not mentioned. 



