JOURNAL 



OF THE 



EOTAL MIOROSGOPIOAL SOCIETY. 



OCTOBEE 1883. 



TEANSACTIONS OF THE SOCIETY. 



XII. — On Asplanchna Eblesbornii nov. sp. 

 By C. T. Hudson, LL.D., F.E.M.S. 



{Received IWh Septemher, 1883.) 

 Plates IX a>-d X. 



This fine new species was discovered about ttree years ago by 

 Mrs. Tupper Carey in a duck-pond in the vicarage grounds at 

 Ebbesborne Wake. I first became acquainted with it this August, 

 when Mr. Thomas Bolton suppHed me with several specimens of 

 both sexes. 



The female differs from the other species of the genus 

 Asplanchna in having one dorsal and two lateral humps, as well as 



EXPLANATION OF PLATES IX. and X. 



Plate IX. 

 Fig. 1. — Female of Asplanchna Ehheshornii, dorsal view. 

 „ 2. — „ „ lateral view. 



„ 3. — ^Male of A. Ehhesbomii, lateral view. 

 „ 4, 5. — Males of A. Ehhesbomii, different views. 

 „ 6. — (a) Penis, (6) sperm-bag, (c) contractile vesicle, (d) end of tortuous 



thread. 

 ,, 7.— Spermatozoa. 

 „ 8. — One of the lateral antennae. 



Plate X. 

 Fig. 9. — Oesophagus, gastric glands, and head of stomach. 

 10. — Muscular threads of oesophagus. 

 11. — Orifice and duct of gastric gland. 



12. — Pharynx, dorsal view ; showing eye and nervous ganglion. 

 13. — „ lateral view ; showing top of oesophagus, 

 14. — „ ventral view. 

 15. — Jaws. 



16. — Central portion of ovary, with maturing germs. 

 17.— Ovum. 



18. — Tortuous threads and vibratile tags. 

 19. — A loop of fig, 18, more highly magnified. 

 Ser. 2.— Vol. III. 2 T 



