42 Verm. 
VERMES. 
Spencer : Geoplana sulphureus , p. 89, G. munda , Fletch. & Ham. 
pp. 89 & 90. 
Wagner. 
Notes, Biology, Synonyms. 
Collin (2) : ( Planaria abscissa , Ijima), = P. alpina. 
Dendy (1): Biology, pp„ 66-70. 
Graff (3) : Monoporus rubropunctatus = ( Proporus rubropunctatus, 
0. Schm). Convoluta saliens ( Cyrtomorpha sa liens) ; C. roscoffensis = 
(0. schultzii), pro parte. Amphichcerus cinerea = ( Convoluta cinerea). 
Lehnert : Biology, regeneration, &c. 
Shipley (1). 
Yoigt (2). 
Morphology, &c. 
von Graff (1) returns to consideration of a Polyclade which he dis- 
covered in Aug. 1876, under a stone at Trieste, and has not since met 
with. It is characterised by the possession of marginal chitinous bristles, 
and is placed in a new family — the Enantiadce — the peculiarities of which 
are, absence of suctorial disc and tentacles. Mouth anterior, im- 
mediately behind brain. Absence of anterior median branch of intestine. 
The intestinal branches anastomose. Male copulatory apparatus lies 
immediately behind pharynx, and is directed forwards. Female appara- 
tus opens immediately behind male, and possesses a strongly developed 
accessory vesicle or Bursa seminalis. Four eye-spots in region of 
ganglion, but none at margin of body. 
von Graff (3) produces a valuable monograph of the Accela, which 
cannot be adequately summarised here. The ventral surface of the 
Accela is richer in glands than the dorsal ; this difference being very 
striking in the case of Convoluta saliens. The Sagittocysts of the two 
green Convolutce, C. roscoffensis and C. schultzii, only occur from the 
region of the female genital opening to the hinder end of body, where 
they are most numerous. Their number varies greatly, 100 being the 
maximum. They are present in their fully developed form at time of 
ripening of male genital organs, and are probably to be regarded as “ lleiz- 
mitteln bei der Begattung.” The mouth of the Accela is always ventral, and 
never leads directly into the parenchyma, but always into a pharyngeal 
tube of varying length. Structure of the parenchym (pp. 14-27). This is 
more complicated than hitherto believed, and varies greatly in constitu- 
tion from species to species. Nervous system (pp. 28-37), The existence 
of a nervous system in the Accela was discovered in the green Convoluta 
of Roscoff, by Yves Delage, in 1885. The otolith lies constantly under- 
neath the brain, either in a depression of it, or distinct from it, and held 
up by two nerves. 
Frontal organ (pp. 40-46). This organ (first described by Delage in 
