The Crinoids vnosi Dr. S. Hock's I'ai'kiui'iox to .I.\i>a\ 1014. (u\ 



2) The higher (li\ isioii-series. wliidi iirc ;ui iiii|i(iitaiit cliai-ac- 

 terislic of chissiiieation. Iia\e not yet appeai't'il. 



;{| Tlie |)i-n\imal ossicles of (he ai'in beeoine longer compared 

 will) the breadth, the younger (he animal is. This is also applicable 

 lo a still greater extent to (he distal 15r-segmeiits. The distal ends of 

 the Hr-segments ai'e sei'ratc and bent outwards. 



4| The comb on die proximal pinnides, a very reliable charac- 

 teristic in adolescent and l'ull-gi-cwn specimens, lends at an early 

 stage to a uniform type and therefore all small young forms ha\'e 

 combs with a few. high, rather large teeth. The young foi'uis of the 

 Gnmastei'-genus o\\\\ have cond)s on the proximal pinnules. 



T)) In the \ery earliest stages the disU has a central motith and 

 a marginal anal tube. 



As a general rule one can say that young Coinasterids which 

 have a pinnule-gap on the proximal ai'iu-parts (hei'c of course exclud- 

 ing .('omastei-ids of (he ('(undliHn type) ai'e impossible to delcrnune 

 even with tcderable certainty. 



Tbe comparison between the apjicarance of the disk shows. 

 however, tiiat here perhaps, one might get certain fixed points for the 

 judgement of the systematical position of the animal. 



The young of the s[»ccies of ComnieUa and large Comissia have 

 a central or subcentral mouth and a short, narrow, inconspicuous 

 anal tube. The skin is tightly stretched on the \entral side between 

 the arms so that the disk gets a characteristically lean appearance. 



The young forms of GoiniHsia igno/a mlnutu are also in the early 

 stages recognized by ha\iiig the ambulaci-al furrows suriounded with 

 cushion-shaped slopes, |irobal)ly marking the extension of the gonads 

 on the disk, and this condition (ogetber with the characteristic proxi- 

 mal Bi--ossicles (already at an early stage very short), the coai'se pin- 

 iiule-l)ases, soon thickened by the genital glands, and the smooth proxi- 

 mal arm-parts make them fairly easy to distinguish from young forms 

 (d' other species in the collection. 



Tlie young forms of Goinaster and Comanlluria in the early 

 stages also have a »fat» (swollen) disk. The anal lube is large, tliick 

 and coarse, a little swollen, often (especially in Comaster- deliatta grun- 

 (Uh\ strongly papillated or plated. In Goinaster — species the length- 

 growth of the anal tube soon ceases, and in larger indi\iduids the tube 



