| Clitellum slightly resembling this of amphius, although on various individuals it was variably developed, unequally encircling segments ventrally. |
| The clitellum of the earthworm secretes a case, or cocoon, into which is secreted a material that serves as nourishment for the young and a mucous substance that aids in copulation. |
| Differently sized partners were seen stretching or contracting their body between the genital region and the clitellum. |
| A histological examination of the clitellum revealed that damage occurred to both male and female gonads. |
| Juveniles were distinguished from adults by size and the absence of a clitellum, and the adults identified. |
| The Polychaeta lack a clitellum and have parapodia, paddle-like appendages with numerous bristles or chaetae. |
