104 CHTROPSALMUS BUITKNDIJKI. 



group, turned with its concave side downward ; they con- 

 sist of a great number of densely crowded gastral filaments, 

 having a length of 3 mm. Moreover the wall of the stomach 

 shows a series of besom-shaped folds, which diverge feather- 

 like from each side of a groove, that forms a continuation 

 of the furrow of the mouth-lobes towards the gastric ostia. 

 From the stomach there hangs down in the bell-cavity the 

 manubrium (fig. 2, ma), consisting of a short funnel- 

 shaped stalk, that bears at its distal end four tongue-shaped 

 mouth-lobes ; each lobe consists of two halves, including 

 between them a furrow, that forms the beginning of the 

 perradial stomach-groove, above referred to. By means of 

 the gastric ostia the stomach communicates with four broad, 

 thin pouches, lying between the exumbrella and the subum- 

 brella, and separated from one another in the interradii, the 

 stomach-pockets (fig. 2, sp); downward they pass into 

 the marginal pockets, which in their turn are in continuation 

 with the velar-canals. From the upper part of these pockets 

 emerge the curious, fingerlike diverticula, that, like the fin- 

 gers of a glove, are extending around equally shaped out- 

 growths of the exumbrella in its adradial region and hang 

 down in the bell-cavity nearly till the opening (fig. 2, pa); 

 these pocket-arras, as they are called by Hackel, show 

 a longitudinal folding, that in their inferior part takes a 

 more transverse direction. The allied genus Chirodropus, 

 according to Hackel *), is charakterized by having within 

 each stomach-pocket two arm-like outgrowths, the inferior 

 part of which is branched in numerous filaments »die 

 sich ganz gleich den Gastral-filamenten anderer Cubome- 

 dusen verhalten" ; therefore they are considered by the 

 named author as modified vestiges of the four umbral- 

 taeniolae of Tessera ^). I have some serious doubt whether the 

 pocket-arms of Cliiropsabnus, that possesses normal phacelli 

 like as other Charybdaeidae, should have this morphological 



1) loc. cit. p. 447, pi. XXVI. 



2) loc cit. p. 430. 



Notes from the Leyden IMuseum, Vol. XXIX. 



