Xoir 



Stuil 



criu IK 



{rahilu. Bif I'rof. J. A. Tlwm.smi. 121 



The most oljvious diftierences between Stitdcrio and Parulcii- 

 onmm may lie .sunnnccl np in tlic following contrast : — 



Slmkria mirabilis. 



The [lulj-ps are crowded uu 

 iinmerous linger - like branches, 

 whicli cover a central dome, and 

 also grow out from the inner walls 

 of the cup. 



The polyps have a dense arma- 

 ture of spicules, foruiinn' a well- 

 defined calyx. 



The walls of the ruii are \ery 

 massi\e and hard. 



The retracule polypariiiui is 

 very subsUmtial, including strong 

 muscle-bands. 



The larger spindles are very 

 characteristic, being covered with 

 warts in thick-set rows. 



Pa rale I/O III urn. 



The polyps are distant from une 

 another, and are borne on the ends 

 of the twigs of a loosely-branched 

 polyparium. 



The polyjis have luiuuLe spicules 

 at the base of the tentacles, but 

 there is no ailyx. 



The walls of the cylindrical 

 lower portion are not thick, ami 

 the whole is readily compressible. 



The retractile polyparium is very 

 delicate and translucent. 



The spindles are much smaller, 



and much less wartv. 



It sliDuld be noted that S/utlerin miriihllix is nnirh larger than 

 Puralcijonivm elegans, much more massive, with much larger and 

 coarser spicules, aiul so on ; but we have reason to believe that the 

 massivene.ss of arcliitecture is a specific, not a generic character. 

 We saw in Septemb(>r in the Zoological JIuseum in Hamburg a 

 number of un-nanu'd specimens of a form which we believe to be 

 closely related to StiuUriu. By the courtesy of the director, 

 I'rofessor Kraepelin, and of Dr. i\Iichaelseu, who has charge of the 

 section of the museum containing Alcyonaria and the like, we 

 were able to examine this form, and to compare it with the ' Inves- 

 tigator' type. The Hamburg specimens, which were collected oil' 

 Formosa (Takao), agree with the ' Investigator ' specimen in having 

 a retractile jiolyparium, similar jiolyps, and the same type of huge 

 warty spindle, but they have not the strong massive cup, nor, so 

 far as we have seen, the same development of central dome, or of 

 digitiform lobes. We do not wish to pui-sue the comparison in 

 the meantime, since I'rofessor Kiikentlial has. we believe, under- 

 taken to describe the un-named Alcvonariaus in the Hamburg 

 Museum. We would, however, express our conclusion thai the 

 Hamburg specinu'us belong, or are closely related, to the genus 

 Studeria, \\\\k\\. we have established for the ' Investigator ' tyi)e. 

 [It must be added that we exhibited, de.scribed, and named the 

 'Investigator' specimen in August 1907, at the Meetitig of tlic 

 International Congress of Zoidogists at Boston, As we have heard 

 nothing regarding the manu.script which we deposited, we have 

 thought it necessary to record tiie facts afresli.] 



