652 
GILBERT E. JOHNSON. 
bulb. Of. Ovary with developing eggs. ovd. Oviduct or “ seminal 
receptacle” with spermatozoa, pop. Papilla, rect. Rectum, rect. gl. 
Rectal glands, sp. Copulatory spicules, test. Testis with developing 
spermatozoa, ut. Uterus with fertilised eggs. v. d. Vas deferens. 
vulv. Vulva. 
Fig. 1. — A mature male of Rhabditis pellio in latero-ventral 
view, showing the reproductive organs. ( X 90.) 
Fig. 2. — A mature hermaphrodite of Rh. pellio in lateral view, 
showing the reproductive organs. This is the typical form developed 
in, and nourished on, the decaying earthworm. ( x 90.) 
Fig. 3. — A mature hei’maphrodite of Rh. pellio fed on peptone, 
showing its inferiority in size to the typical hermaphrodite nourished 
on the decaying earthworm, and the smaller number of eggs in the 
uterus. ( X 90.) 
Fig. 4. — An active larval individual of Rh. pellio from the neph- 
ridium, showing the genital rudiment. ( X 230.) 
Fig. 5. — An encysted larval individual of Rh. pellio from the 
coelom in the act of escaping from the cyst. ( x 230.) 
Fig. 6. — The anterior end of a hermaphrodite of Rh. pellio in 
lateral view, showing the mouth-parts, nerve-collar and excretory 
system. ( x 350.) 
Fig. 7. — The tail of a hermaphrodite of Rh. pellio in ventral view 
showing the rectal glands and caudal papillae. ( X 350.) 
Fig. 8. — The tail of a hermaphrodite of Rh. pellio in lateral view, 
showing the short rectum in distension and the anus. ( X 350.) 
Fig. 9. — Tail of a mature male of Rh. pellio in latero-ventral view, 
showing the bursa, bursal papillae and copulatory spicules. ( X 350.) 
Fig. 10. — Tail of a male of Rh. pellio in dorso-lateral view showing 
the copulatory spicules and the accessory piece. ( X 350.) 
