CKATEROMORrilA MEYElll. 61 



Spiculation. 



The spiculation wa« studied i)riiK'i|)ally <>ii tlie 8ei. Cull. 

 specimen (No. 364). I am also greatly indel)ted to Professor. ^^ 

 E. Schulze for a gift of slide-preparations made from Celui 

 specimens, wliicli have Ijeen invaluable for the purpose of com- 

 parison. As in external form, so also in spiculation I «ibserve 

 an essential and far-reaching agreement between the Japanese 

 and the Pliili])pine specimens. 



The parencJiyMaJia are mainly diactins. among which iK'xacl- 

 inic forms are occasionally intermixed. 



The diactinic })arenchymalia are as usual of varied dimen- 

 sions, ranging from filamentous comitalia \\\) to princi})alia ut* ô 

 mm. or more in length and 80 //. in thickness in the middle. 

 The larger diactins are met with more especially in the deeper 

 ])arts of the body, close to the canalar and the gastral surfaces. 

 They are bow-like or elongate spindle-shaped ; smooth through- 

 out (not roughened at ends), -without central swelling or knobs 

 and gradually running out to the pointed ends. This refeis 

 more especially to the larger diactins of the body proper ; those 

 i.)ï the stalk are generally roughened at the ends, which are often 

 rounded instead of being pointed. The thinner diactins, which 

 occur either isola tetl or as comitals, are smooth at the center or 

 show there at most a weak annular swelling ; their ends are always 

 roughened and either swollen and rounded or attenuated to a point. 



The isolated oxyhexactinic parenchymalia (some shown in 

 IM. lY., fig. 7) are of a medium or moderately large size. Tluy 

 may approach the dimensions of a hypodermal })entactin but are 

 generally considerably smaller. The rays are smooth and straight 



