A Description of three Acoela from the Gulf of Naples. 
1. ApJianostoma pulchella, (Uljanin, non 
A. pulchella mihi Pereyaslawzewa). 
2. Monochoerus lineatus, n. sp. 
3. Amphiscolops fuUgineus, n. sp. 
by 
Florence Peebles. PhD. 
(With 12 text-figures and piate 10.) 
Contents. 
A. Introduction 292 
B. Description 293 
1. Aphanostoma pulchella 293 
a) Historial review 293 
b) Externa! features and behaviour 294 
c) Anatomy 295 
2. Monochoerus lineatus 298 
a) External appearance 298 
b) Anatomy 299 
c) Relation to other Acoela 302 
3. Amphiscolops fuligineus 304 
a) External appearance 304 
b) Anatomy 305 
c) Relation to other Acoela 307 
C. Conclusion 308 
D. Literature 310 
E. Explanation of figures 311 
Mitteilungen a. d. Zool. Station zu Neapel. Bd. 22, No. 9. 
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