HIPPONOE GAUDICHAUDI. 171 



corresponds no doubt to the ventral cirrus of other Am- 

 phinomidae. 



The largest specimen measures 24 mm. ; its number of 

 segments amounts to 34. The worm , found by Fritz 

 Muller between the valves of Lepas anatifera ') , certainly 

 was a species of the genus Hipponoë , perhaps H. Gau- 

 dichaudi. 



Genus Muphrosyne Savigny. 



Euphrosyne laureata Sav. (PI. 7, fig. 15; pi. 8, figs. 

 8 and 9). — Savigny , Système des Annélides , p. 63 , pi. 

 II, fig. 1. — Baird , loc. cit. p. 236. — Grube, loc. cit. 



P- 11. 



This species was for the first time described and splendidly 



illustrated by Savigny after a specimen from the Red-Sea, 

 where it seems to be very common ; afterwards a single speci- 

 men was collected by Semper on his voyage to the Philippines. 

 I believe that a worm , forwarded to our Museum by Mr. 

 Wienecke from Timor, is identical with the same species. 

 It is to regret that neither Savigny nor Grube has given 

 us any illustrations of the bristles of this animal. Our 

 specimen measures 30 mm. in length and its greatest 

 breadth is 10 mm. The bare space between the branchiae 

 on the middle of the dorsum is 5 mm. broad; the num- 

 ber of segments amounts to 36. The caruncle is connected 

 with its base to the four anterior segments and impinges 

 a little on the fifth ring, as figured by Savigny; however 

 according to Grube's description it should be attached to 

 5 segments and extend to the sixth. The number of bran- 

 chiae in one series is usually 7 , but somelimes I counted 

 8 , another small one being situated at the external end 

 of the series. As is known , this species is especially cha- 

 racterized by having the row of dorsal bristles much 

 shorter than the series of branchiae. In our specimen that 



1) Fur Darwin, p. 30. 



Notes from tlie Leyden DMuseum, "Vol. "VIII. 



