Art. 2.— T. Kabnraki: 



Text fig. 1. Ventral side of the head 

 end of Bdelloccphala annandalei Is. et 

 Kab., showing adhesive folds and groove. 



specimens reach 40 mm. in length and 15 mm. in breadth at the 

 pharyngeal region. • 



Colouration. — The colour of tlie dorsal surface is somewhat 

 variable, but usually reddish brown; the positions of the pharynx 



and the copulatory organs are 

 indicated by almost colourless 

 spaces. The ventral surface is of 

 a much lighter colour than the 

 dorsal. 



Eyes. — The two crescentic 

 eyes, each surrounded by a small 

 oval colourless space, are situated 

 at the hind border of the head lobe, and are widely separated 

 from each other. 



Body Wall. — The epidermis consists of a layer of ciliated colum- 

 nar cells, which are of a greater height on the dorsal side than on 

 the ventral. Wedged in between the cells are spindle-like rhab- 

 dites, which originate from their mother-cells, scattered in sparse 

 numbers in the parenchyma. The basement membrane is fairly 

 thick and distinct. The underlying dermal musculature. Avhicli is 

 strongly developed, consists on the dorsal side of tliree sets of fi])res, 

 circular, transverse and longitudinal. The outer circular muscles 

 occur in distinct thick bundles, unlike those of the mnjority of the 

 Triclads. The longitudinal muscular layer, which is the best de- 

 veloped of all the muscular layers of the body, is of great thickness. 

 Besides, directly inwards to tlie longitudinal layer there exists a 

 laj^er of inner circular fibres on the ventral side. In addition there 

 is a Avell-developed system of parenchyma-muscle, chiefly composed 

 of dorso-ventral fibres. Embedded in the parench\^ma are numer- 

 ous glandular cells, which open to the exterior submarginally on 

 the ventral surface as w^ell as at various points of the entire body- 

 surface, much as in any other forms. 



In the region of the adhesive folds numerous glands open 

 to the exterior. The epidermis lining the depression is wholly 

 devoid of cilia and rhabdites. The organ cannot be compared 

 to the sucker of cotyligerous Turbellaria, or to the muscular sucking 



