Figure 30.—Archocelh macrorhabdilis. 



\9 (18) Seminal bursa present or absent but when present opening 



anterior to the male copulatory organ 25 



20 (19) Bursal nozzles present 21 



20 (/9) Bursal nozzles absent 23 



2 1 (20) Testes paired and the two ovaries fused (Fig. 3 1 a); penis muscular (Fig. 31b) 



Genus Nolocelis. 



Figure il.—.\oloceUs guUmarensis: a-dorsal view; b-sagitlal reconstruction of male and female accessor> organs. 



21 (20) Testes and ovaries paired (Fig. 32a); penis muscular (Fig. 33b) or with cuticular needles (Fig. 32b) 



.22 



Figure 32. — Philocelis ceUala: a-dorsal view; b-sagiltal reconstruction of male and female accessory organs. 



^Genus Exocelis, recently described from the Galapagos Islands, has many small nozzles, a feature which makes it easily distinguishable from the other genera of the Otocilididae. Also, the 

 seminal bursa in this genus lies caudal to the male organ, a situation found in no other acoel. 



Figure 31c. — Exocelis exopenis. 



17 



