342 



SCIENCE. 



[N. S. Vol. XII. No. 296. 



apparent bifurcation of two of the primary 

 canals at distances varying from a fourth 

 to three-fourths of the distance toward the 

 margins. 



Several specimens were likewise found 

 with five canals. Indeed, this was a not 

 uncommon feature and the medusa was di- 

 vided into a regular pentamerous form, 

 quite similar to reports made by several 

 observers of pentamerous Aurelias. 



Of those with three canals several varie- 

 ties were found, those with three symmet- 

 rical canals dividing the bell into thirds, or 

 making a trimerous form, the canals being 

 at angles of 120 degrees. In other cases 

 the one-half of the bell was equally di- 

 vided by the third canal into quadrants 

 while the other half remained undivided, 

 showing that in this case there had been 

 the total suppression of one of the canals. 



In a few cases a sort of aboral circular 

 canal was present, the radials instead of 

 entering directly into the gastric pouch en- 

 tered a circular canal which surrounded it. 

 Of these there were several forms which 

 only diagrams can make clear. 



In conclusion it may be suggested that 

 there was an apparent absence of any cor- 

 relation of variation and also of any ' mer- 

 istic ' feature. 



Charles W. Hargitt. 



Syeacdse University. 



carries a long cirrus d. c, and a gill gill at- 

 tached to this cirrus. These gills are ab- 

 sent from the most anterior segments and 

 appear first on the parapodia of the 19th 

 segment. The parapodium carries a single 



stout, straight, aciculum, with several 

 smaller ones, toothed at the ends, and 

 crossing the first at an angle. A dorsal 

 and a ventral bundle of fine setse are pres- 

 ent. Anteriorly there is a thick ventral 

 cirrus, which is much smaller toward the 

 posterior end of the body (not shown in 

 the figure.) A bundle of fine setse extends 

 into the dorsal cirrus. 



The organ in question is situated on the 

 outer side of the base of the dorsal cirrus, 

 s. org. , Fig. 1. It appears on the first segment 

 as a slight swelling, which becomes more 



LATERAL LINE ORGANS IN EUNICE AURIC- 

 TJLATA 11. sp. 



In a hitherto undescribed species of 

 Eunice, to which I have given the above 

 specific name, occurs a lateral line organ 

 which, so far as I can learn, has not pre- 

 viously been discovered in this family. The 

 specimens were collected in Porto Eico by 

 the U. S. Fish Commission Steamer Fish 

 Hawk during the winter of 1898-99. 



The parapodium, as is characteristic of 

 this genus, is uniramous, only the notopo- 

 dium remaining, not, Fig. 1. Dorsally this 



and more prominent posteriorly, until it 

 reaches the condition shown in fig. 1. It 

 is a rounded, smooth projection, slightly 



