144 THE ZOOLOGIST. 



28 — 33 



5. L. castaneus, Sav. (=L. purpureus, Eisen, &c.). 29.32 

 The smallest of all the true Lumbrici ; often difficult to distinguish 

 from such worms as Dendrob(sna mammalis and its allies. 



II. Allolobophora. 

 Colour variable, girdle and tubercula extending over a variable 

 number of segments. Best known by the study of the head. 

 The prostomium does not cut entirely through the first segment. 

 The internal characters differ from those of Lumbricus. 



28 — 35 



6. Allolobophora longa, Ude. 32^734 The Longworm ; often 



confused with L. terrestris. The specific name lo?iga is preferred 

 to terrestris as being less confusing. 



27 — 34 



7. A. trapezoides, Duges. g^r^ Very similar to the next, 



both of which are sometimes included under the name A. caligi- 

 nosa, Savigny. 



8. A. turgida, 'Eisen. ._^^ ~ gg 



III. Aporrectodea. 

 In this genus the tubercula are on alternate segments, and 

 so it is linked op to the last genus by means of No. 8, which 

 closely resembles the next. 



29 — 35 



9. Aporrectodea georgii, Mich. 3377-33 



10. A. chlorotica, Savigny. ^ ^ . 33 . ^ The best known worm 



of the class, sluggish, dirty green, but very variable in colour. 



29 — 37 



11. A. cambrica, Friend. 31 .33^35 Related to No. 10 as 



No. 9 is to No. 8. 



28-35 



12. A. similiSfFnend. 



30 : 32 : 34 



IV. BiSENIA. 



Not easy to distinguish from the foregoing except by the 

 study of internal characters. 



26 — 32 



13. Eisenia foetida, Sav. 28,30 The well-known Brandling, 

 with red and yellow bands, found in manure-heaps. 



27 — SS 



14. E. veneta, Eosa (= E. hibernica, Friend). 307731 Pei'haps 

 the most variable worm we have. Half a dozen well-marked 

 varieties have been named by myself and others. 



