JG2 



XI. — Alien Olir/och.vts in Enfjland. 

 By The Eev. Hilderig Friend. 



(Bead May 17, 1916) 

 Figs. lG-20. 



Dichof/aster lafjcniformis sp. n. 



In a communication which I liad the honour to submit to the 

 Eoyal ^Microscopical Society in January last(tf)*, some details were 

 Ljiven of a new species of exotic 01igoch;et {Kcrria rulra Friend) 

 which was found by me in the Botanic Garden at Oxford. The 

 present paper deals with a second species of worm found in the 

 same locality and at the same time. The description is based 

 upon a series of longitudinal sections through the first 22 segments 

 of an adult worm. Unfortunately, the specimen was found to 

 contain a good deal of earthy matter which materially affected 

 some of the sections, especially in the region of the gizzard. All 

 the essential organs are, however, present in perfect condition, 

 and it is possible to prepare such a diagnosis as will leave no 

 important element out of calculation. 



The great difficulty has been to fix the exact position which 



* The figures within brackets refer to the Bibliography at the end of the paper. 



EXPLANATION OF FIGURES. 

 The numerals refer to the number of the segment. 



Fig. 16. — Longitudinal section through segments 9-21, showing position of gizzard, 



intestine, oesophageal glands, prostates, and sexual organs. 

 ,, 17. — Seta and sac from segment 3. 



„ 18. — Spermathecse, with diverticulum and muscular layer of body-wall. 

 ,, 19. — Longitudinal section through anterior portion of worm (segments 1-8), 



showing prostomium, tongue, buccal cavity, salivary glands, pharynx, 



and pharyngeal gland. 

 „ 20. — Diagram of segments 1-21, to illustrate the relative position of the 



organs. 



Abbreviations. — b.c. buccal cavity ; hr. brain ; b.v. blood-vessel ; c.d. common 

 duct; cut. cuticle; d. diverticulum; d.v. dorsal vessel; gir. girdle; giz. gizzard; 

 /. funnel ; f.p. female pore $ ; int. intestine ; int.e. intestinal enlargement ; 

 onus, muscle ; m.p. male pore S ; n. nerve ; neph. nephridium ; tes. oesophagus ; 

 as.gl. oesophageal gland ; o.f. funnel of oviduct; ov. ovary; per. 'peritoneum ; 

 ph. pharynx ; ph.gl. pharyngeal gland ; j)r. prostate ; pros, prostomium ; s.sac. 

 Bperm-sac ; s.g. salivary gland ; sp. spermatheca ; spz. spermatozoa ; t. testis ; 

 v.v. ventral vessel. 



