598 



Transactions of the Society. 



No. 



7 

 8 

 9 

 10 

 11 

 12 

 13 



±i 

 15 

 16 

 17 

 18 

 19 



Seg- 

 ments 



Remarks 



40-45 

 30-45 

 55-60 

 45-50 

 25-30 

 25-35 



50-55 

 45-50 

 40-50 

 35-40 

 50-60 

 45-50 

 35-40 



40-45 

 40-45 

 50-60 

 50-55 i 

 20-50 I 

 50-60 



Dorsal vessel arises in 12th segment 

 Sperm-funnel hardly 2x1 

 Very large sac-like salivary glands 

 (Esophagus widens in 8th segment 

 Smallest Henlea yet described 

 CBsophagus enters intestine in 7th 



segment 

 No glands at opening of spermathecse 

 Dorsal vessel arises in 8th segment 

 No oesophageal or salivary glands 

 First pair of nephridia in 5/6 

 Salivary glands present 

 No salivary glands observed 

 One pair of oesophageal glands in 7,h 



segment 

 Dorsal vessel arises in 12/13 

 Pair of oesophageal glands in 8th seg. 

 Salivary glands long and twisted 

 Dorsal vessel arises in 8/9 interseg. 

 Two pairs of spermathecte 

 Two pairs of oesophageal glands 



Name 



H. marina 

 H. lampas 

 H. curiosa 

 H. tenella 

 H. perpusilla 

 H. rosai 



H. arenicola 

 H. dicksoni 

 H. rhaetica 

 H. vanata 

 H. nasuta 

 H. heterotropa 

 H. attenuata 



H. triloba 

 H. fragilis 

 H. hibernica 

 H. fride^-icioides 

 H. puteana 

 H. ventriculosa 



No. 



(15) 



(7) 

 (12) 



(9) 

 (8) 

 (6) 



(10) 



(3) 

 (18) 



(16) 



(1) 

 (14) 



(17) 



(19) 

 (13) 



(4) 



(11 

 (5 

 (2) 



V. — BiBLIOGEAPHY. 



1. MiCHAKLSEN— Abh. Ver. Hamburg (1889), xi.. Heft 1, p. 31. 

 2. Das Tierreich (1900). 10 Lieferung, Berlin. 



3. Beddakd — Monograph of the Order Oligochseta (1895). 



4. Bretscher— Eevue Suisse de Zoologie. Geneva (1899-1904). 



5. Southern — Irish Naturalist (1907) xvi. p. 70. Dublin. 



6. Proc. Koy. Irish Acad. (1909) xxviii. p. 46. 



7. Friend— The Naturalist (Sept. 1911) pp. 318-21. 

 8 The Zoologist (Dec. 1911) pp. 464-8. 



9. The Naturalist (1896), p. 298. 



10. Essex Naturalist (1896) ix. p. 110 



11. IsSEL— Zool. Jahrb. (1905) xxii. p. 454. 



