614 F. W. GAMBLE. 



Allceoccela : 



Plagiostoma dioicum, Metschnflf. 



„ sulphureum, V. GrafiF. 



„ Girardi (O. Scb.). 



„ pseudomaculatum, n. sp. 



„ sagitta (Vlj.). 



„ elongatum, n. sp. 



J, caudatum, Lev. 



„ (?) siphonophorum (O. Sch.). 

 Vorticeros luteum, v. GraflF. 

 Cylindrostoma inerme, Halley. 



„ clongatum, Lev. 



Monoophorum striatum (v. GraflF). 

 Monotus albus, Lev. 

 Automolus horridus, n. sp. 



„ ? ophiocephalus (O. Sch.). 



3. The relations of the Turbellarian fauna of our coasts with 

 that of neighbouring seas cannot be determined with certainty 

 until more extended observations are recorded than we possess 

 at present. Mediterranean and Adriatic forms occur on our 

 south-western stations (Plymouth, &c.). Thus seven Polyclads 

 and sixteen Rhabdocoeles (33 per cent, of our fauna) are 

 common to Naples, Trieste, and Plymouth. A large proportion 

 (about 70 per cent.) of Scandinavian forms occur on our coast. 



IV. Appendix. 



Synopsis of the Families, Sub-families, Genera, and Species 

 OF British Marine Turbellaria. 



I. RHABDOCCELIDA. 



Section A. — Accela.^ 



1. With a single genital pore . . Family Proporida. 



a. Without spermotheca . . Genus Proporus. 



Species: — P. venenosus (elongate, yellow, two eyes 



present, provided each with a large lens). 

 ■ For the definition accidentally omitted see p. 440, 



