AMPHIOXUS LANCEOLATUS. 
365 
Contributions to the Knowledge of Amphioxus 
lanceolatus, Yarrell. 
By 
£. Ray l>anli.ester, M.A., LL.l),, F.R.S., 
Professor iu University College, London, 
With Plates XXXIY, XXXV, XXXVI, XXXVI A, & XXXVI B. 
It is now fourteen years since I published in the f Quarterly 
Journal of Microsc. Science ’ (vol. xv) some notes on the 
structure of Amphioxus. I have delayed publishing until the 
present date fuller illustrations of the facts then recorded, but 
have made use of my material in annually recurring lectures 
at University College. 
One statement made in the notes above referred to I am not 
able to confirm, and must withdraw. I refer to the supposed 
confirmation of Johann Muller’s statement (1) that there is a 
pair of apertures on either side of the oral sphincter (velum of 
Huxley). I stated that these apertures lead from the pharynx 
to the prseoral space. Muller had described them as leading 
into the metapleural canals. In reality there are no such 
apertures at all. 
The “ brown funnels,” which were described in my original 
note, are the most important structures which I have now to 
illustrate. Curiously enough, they have escaped all subsequent 
observers with the exception of Mr. William Bateson (2), of 
St. John’s College, Cambridge, who confirmed my observation 
as to their position and character, and has compared them 
very significantly with the “ collar-pores” of Balanoglossus. 
My purpose on the present occasion, in addition to that of 
VOL. XXIX, PART 4. NEW SER. B B 
