102 CHIROPSALMUS BUITENDIJKI. 



of Ch. Buitendijki were met with in the vicinity of the shore, 

 in the road of Batavia; they have no colour, but are 

 transparent, gelatiüous, the tentacles only have a rosy hue. 

 The bell (fig. 1) has the shape, commonly seen in 

 Cubomedusae, of a cube with a rather arched roof and is 

 nearly as broad as high, 65 to 70 mm. ; its lateral sides 

 as well as the ribs are somewhat rounded. However the 

 last ones in their inferior part, where they are passing into 

 the pedalia, are prominent and edged. In the upper part 

 of each lateral area, just beneath the roof, two large semi- 

 lunar spots (fig. 1, pa) are to be seen, lying opposite to 

 each other; they have the appearance of orifices, but are 

 in reality the solid bases of the pocket-arms. Moreover 

 each lateral side shows two adradial furrows, situated in 

 the middle between the sensory-bodies and the pedalia, 

 that sett oS an arched median area from two lateral ones; , 

 these furrows do not extend over the total height of the 

 bell, but reach from about the level of the bases of the 

 pocket-arms till the region of the sensory-bodies. Also the 

 interradial ribs are provided in their superior part with a 

 shallow groove. From the base of each rib springs a 

 pedalium (fig. 1, pe and fig. 4), that has the shape of 

 the blade of a knife or sickle, measuring in length about 

 half the height of the bell ; it bears upon its outer edge 

 5 to 6 (in one specimen even 7) also laterally compressed, 

 knife-shaped branches, that are diminishing in length from 

 its proximal till its distal extremity, and which have 

 attached at their end the tentacles. The main axis of the 

 pedalium as well as its lateral continuations are hollow and 

 contain a canal, that communicates with the gastro-vascular 

 system; at its origin the main canal is furnished with an 

 elongated, cap-shaped diverticulum, that ends blind in the 

 base of the rib. The tentacles have a ringed appearance, 

 being surrounded by alternate broad and narrow bands, 

 which contain large and small thread-cells; I am unable 

 to mention their real length, because none of the tentacles 

 was complete. 



Notes from the Leyden Miuseum, "V^ol. XXIX. 



