260 REPORT— 1902. 



present year; your Committee desire to point out that on emergency 

 willing and competent persons were but awaiting their appeal. Reassured 

 by this, in applying for a renewal of the grant they have every confidence 

 in the future ; and they are of opinion that the increased facilities afore- 

 named, by widening the field of action, will more than ever incur the 

 favourable consideration of the Association's Board. 



APPENDIX. 



I. Jie})Oi't on the Occupation of the Table during December 1901 and 

 Jamianj, June, and July 1902. 



a. On the Struclvre and Development of the Excretori/ Apparatus of Amphio.xus . 



By E. S. Goodrich, M.A. O.ron. 



During the latter end of December 1901 and most of January 1902 

 I occupied the British Association Table at the Zoological Station in 

 Naples. I had then the opportunity of examining the structure of the 

 excretory organs of Amphioxus in fresh and preserved specimens. As a 

 result of this study, it was discovered that the kidneys of Amphioxus are 

 not, as had hitherto been supposed to be the case, segmental tubules 

 opening by many funnels into the ccelom, and comparable to the excretory 

 organs of the higher vertebrates ; but, on the contrary, that these kidneys 

 are in the form of tubules opening only to the exterior (atrium), and pro- 

 duced internally into blind branches. Moreover, it was found that these 

 internal extremities are provided with numerous peculiar cells (incom- 

 pletely described by Boveri) perched on the free ends of long and narrow 

 tubes, down each of which works a single flagellum driving the excretory 

 fluids into the renal canal. These cells exactly resemble the excretory 

 cells (Solenocytes) which I have described as situated on the inner 

 blind ends of the nephridia of certain Polychaite worms. It would 

 appear, then, that the kidneys of Amphioxus are, physiologically and 

 morphologically, strictly comparable to the nephridia of certain Annelids. 



The results of this work have been embodied in a preliminary note read 

 last January before the Royal Society, and in a more complete and illustrated 

 memoir published in the ' Quarterly Journal of Microscopical Science.' 



In June and in this month of July 1902 I have again had the privi- 

 lege of occupying the British Association Table in Naples, and am 

 engaged in working out the development of the excretory organs of the 

 larval Phoronis and Amphioxus. 



Iiej7ort on the Occupation of the Table during March and April 1902. 

 b. On Trematodes and Cestodes parasitic in Fishes. By Norman Maclaeen. 



During the six weeks in which it was my privilege to work at the 

 Stazione Zoologica this spring I confined myself almost entirely to col- 

 lecting material (Trematodes and Cestodes) for future anatomical investi- 

 gations. Upwards of two hundred fishes were examined, and numerous 

 specimens were collected. 



One of the most interesting species obtained was a hitherto undescribed 

 Didymozoon from the gills of a young Orthagoriscus mola. There were 

 four cysts on the same fish, varying in size from 1 to 3 cm. long and 

 about 1 cm. thick. The worms are so intricately wound together that 

 it is exceedingly difticult to isolate a single individual ; but judging 



