PHRONIMA SEDENTARIA. of 
ber of young Phronime, in company with their parent. 
In the British Museum is a specimen of Doliolum papil- 
losum, of Delle Chiaje, from Naples, in which a specimen 
was found, and which is represented in our figures at the 
head of this description,* the small white dots repre- 
senting small masses of calcareous matter. Mr. Mac- 
Donald has informed us that he has kept some alive 
while inhabiting specimens of Doliolum, and that it was 
chiefly through the agency of the crustacean that the 
medusa was propelled through the water, adding that as 
they progressed they frequently rolled over and over. 
* Figured also by Delle Chiaje, ‘‘ Animali Invertebrati, tay. xxiii. ; see 
also Otto, in ‘‘ Nova Acta,” xi. p. 313. 
