ART. 14.— K. YENDO: 



In these the diameter of the geniculum is much smaller than that 

 of the adjacent articuli ; and the greater part of the geniculum is 

 exposed outside. Or, in other words, the part exposed to the outside 

 is comparatively larger than the part hidden under the circumgenicular 

 cortex. Hence the genicula of this type appear to the naked eye like 

 brownish spots. 



III. Bandform : the genicula at the lower portions of the 

 members under the section Eunjtion, Dene, belong to this type 

 (fig. E). 



This type of genicula has the diameter equal or nearly equal to 

 that of the adjacent articuli. The length is comparatively great. 

 The articuli are destitute of circumgenicular cortex. On the contrary, 

 a portion of the distal end of an articulus is covered by the outgrowth 

 of the successive geniculum. The details will be «iven in a later 

 chapter. 



IV. Filiform : the peculiar genicula of Amp. stelligera, Amp. 

 Charoides, etc., belong to this type (fig. D). 



They are very long genicula, often several times longer than 

 the diameter. The diameter of the genicula is smaller than that of 

 the articuli, hence the whole appearance is filiform. In the youngest 

 stage of its development it is undistinguishable from " spotty " 

 genicula as in the upper parts of Amp. canaliculata. 



X . Fenestraform : the genicula at the upper portions of the 

 fronds of Amp. dilatata, Amp. ephednra, Amp. Boioerbankii^ etc., 

 belong to this type. 



The genicula here mentioned are by no means the complete ones. 

 They are always to be found at the upper and younger portions of 

 the fronds which are without exception furnished with the " band- 

 form "' genicula at the basal parts. The " fenestraform " genicula, 

 therefore, should be taken only as a young stage of the " bandform " 



