184 K. MiTsrKur.i : studies on 



of (loi'sal papilla''. In tho first spocimon, lon,!j;tli G.2 cm., brendth 

 I.Gem., pcdieols on oncli side 47 — 4S in nnmbor, and dorsal 

 ]iapilla3 18—20; in tho second, lon^^tli 4 cm., breadtli 0.9 cm., 

 ])('dieols 31 — 32, and dorsal papilla^ 12 — 15. Owing to the small 

 size of tho animal and tho largo number of the lateral pedicels, 

 the latter become necessarily smaller than is generally the case 

 in the species of Lcelmogone or llijocla'mon, and ajipear crowded ; 

 in fact, some parts of the row appear donblo oi- at least alternate- 

 ly double. The diameter of tlie dorsal papillae is about the same 

 as that of the lateral pedicels. 



The tentacles number 15 and are relatively large. In one 

 specimen their tips are deep violet ; in another, yellowish. The 

 tentacular disk, in the center of which the mouth is situated, is 

 obliquely situated so that the dorsal surface is considerably 

 longer than the ventral surface, and the mouth faces decidedly 

 ventrally. 



The calcareous deposits are eharactei'istic : they are largo 

 wheels, small wheels, and rods. ( i ) I^arge wheels are confined 

 almost exclusively to the dorsal perisome, which has besides 

 these, at the most only a few small wheels scattered far between. 

 The lai'ge wheels have almost without exception twelve spokes, 

 and six unequal central holes (textfig. 33fl). Their sizes are 

 variable, the largest being about 0.18 mm. and the smallest 0,08 

 mm. in diameter. There are all intermediate stages, (ii) Small 

 wheels are found in the ventral ^Derisome, the dorsal papilla?, and 

 lateral pedicels. These have, also almost invarial:)ly, twelve spokes ; 

 but the central holes are as invariably four in number {h) and about 

 0.04 mm. in diameter. At the same time there are some 

 which may be said to be between the large and the small wheels, 

 and may be called middle-sized : thus, in Spec. No. 1519 there arc 



