JELLY-FISHES. 



103 



structure the axis is enlarged into a bag-like inflation. There is, liowever a well- 

 develoi^etl nectostem and two series of nectocalices as in Agalmu. Around the cir- 

 cumference of the inflation, which takes the jdace of the jiolypstem, the tasters with 

 their short, tentacular filaments are arranged side l>y side. The jiolviiites and sexual 



f^ 



. ru:j..„i,h,, 



hodies are found Lelow these structures. Xo true covering-scales exist in the genus 

 I'hllii02'>hora. 



One of the largest of all the Physo]iliora' is the g(>nus Apoleniia, the ty]ie of 

 the Apolemiad.e, which is called by the Italian fishermen by the suggestive name of 

 "lana di mare." In this beautiful Siphonophore we have, as in other float-bearing 

 medusae thus far considered, a double row or series of nectocalices, but unlike the 

 last mentioned genera, there arises from the nectostem, small bodies resembling 



