474 T. H. MORGAN. 



PLATE 41. 



AH flgures are from the anterior end of L. (Allolobophora) fcetidus. 

 See text pages 407 to 418. 



Fig. 1, A B. — Pourth metamere, incompletely developed on right side. 

 Fig. 2, a b. — Second metamere, ditto. 

 Fig. 3, a b.— Fifth ditto, left side. 



Fig. 4. — Failure of septal line between 9th and 10th metameres to meet 

 above. 

 Fig. 5. — Ditto between 5th and 6th ditto. 

 Fig. 6.— Ditto 4th and 5th ditto. 

 Fig. 7.— Ditto 3rd and 4th ditto. 

 Fig. 8.— Ditto 13th and 14th ditto. 

 Fig. 9.— Ditto 12th and 13th ditto. 

 Fig. 10.— Ditto 11th and 12th ditto. 

 Fig. 11, A B. — Ditto 1st and 2nd below. 

 Fig. 12.— Ditto 13th and 14th below. 



Fig. 13. — Ditto 5th and 6th at side. 



Fig. 14. — Spiral of category viii, involving 7th, 8th, and 9th metameres. 

 Fig. 15.— Ditto, involving 12th, 13th, and 14th. 



Fig. 16.— Ditto, 11th, 12th, and 13th. 



Fig. 17.— Ditto, 12th, 13th, and 14th. 



Fig. 18. — Ditto category x, involving 6th, 7th, 8th, and 9th. 



Fig. 19.— Ditto, 11th, 12th, 13th, and 14th. 



Fig. 20, a, b, c. — Ditto category vii, involving 2nd, 3rd, and 4th. 



Fig. 21, a, b, c— Ditto, 9th, 10th, and 11th. 



Fig. 22, a, b, c. — Ditto category ix, involving 6th, 7th, 8th, and 9th ditto. 



Fig. 23, a b, c d. — Two modifications — categories ii and v. 



Fig. 24, a b c. — Short spiral ; origin doubtful. 



Fig. 25, a b c. — Spiral viii and compound metamere i combined. 



Fig. 26. — Spiral of category viii, very long, involving 11th — 24th meta- 

 meres. 



Fig. 27, a b c. — Ditto, long, involving 10th — 16th. 



Fig. 28.— Ditto, 13th— 24th. 



Fig. 29, a b c. — Spiral category vii, involving 14th, 15th, and 16th. 



Fig. 30, a b c. — Ditto category viii, involving 15th, 16th, and 17th. 



Fig. 31, a b.— Ditto, 15th, 16th, 17th, and 18th. 



