36 TURBELLARIA OF PLYMOUTH SOUND. 
actually found, The following is a list of the Duke Rock Tur- 
bellaria : 
Polycladida, Leptoplana tremellaris, Hurylepta cornuta, Stylo- 
stomum variabile. 
Rhabdoceelida. 
Ruaspocera, Promesostoma ovoideum, Pr. solea. 
Att@oceta, Plagiostoma dioicwm, Pl. girardi, Enterostoma 
austriacum, Cylindrostoma inerme, Monoophorum striatum, 
Automolos unipunctatus. 
Drake’s Island. 
The well-known collecting-ground on the north-eastern face of this 
locality has furnished the followimg fauna. The great belt of 
Laminaria extending in the direction of the Breakwater did not add 
anything of interest. 
Polycladida, Leptoplana tremellaris, adult and young (8 mm, long). 
Rhabdoceelida. 
Acana, Proporus venenosus, Monoporus rubropunctatus, Con- 
voluta paradowa. 
Ruaspocata, Promesostoma marmoratum, Pr. solea, Pr. agile, 
Byrsophlebs intermedia, Byr. graffi, Acrorhynchus caledonicus, 
Macrorhynchus naegelit (Claparéde’s variety with dorsal 
yellow streak), Provortex affinis. 
Auteoceta, Plagiostoma vittatum, Vorticeros auriculatum, 
Cylindrostoma quadrioculatum (also on the 8.K. face of the 
island), 
Redding Point. 
By this locality I include the shore from Redding Point to north- 
ward under Mount Edgcumbe Park. This area is prolific in littoral 
forms, the tide-pools and rocks being covered with a profusion of 
animal and vegetable life. Promesostoma marmoratum, Monotus 
fuscus, and M. lineatus are the prevalent forms, the two latter 
species being particularly abundant among the Ulva that covers the 
stones. The use of a hand-net in the tide-pools needs some discretion, 
since the crustacean Virbius varians swarms to such an extent as to 
exclude almost everything else. To get over this difficulty it is 
necessary to employ a fine sieve, as described in the introduction. 
A comparison of the Turbellarian fauna with that of other parts 
