58 LIVERPOOL BIOLOGICAL SOCIETY. 
present species only; the genus Hersiliodes includes two 
species, Hersiliodes thompsonii and H. puffint. The former 
species he most courteously connects with my name, the 
latter being the species hitherto known as Cyclops puffint, 
which he considers to be more correctly included in 
Hersiliodes than in the genus Cyclops. He thinks it 
possible that my specimens of Hersiliodes puffint are not 
fully developed forms, the adult being yet unknown. 
M. Canu figures three stages of Giardella callianasse ; 
the specimen found in our district corresponds with the 
second the ‘‘Cyclops”’ or less developed stage. 
Family. NOTODELPHYID. 
Notodelphys allmani, Thorell. 
Notodelphys ascidicola, Allman, ‘‘Ann. and Mag. Nat. Hist.,” vol. xx., 
pl. i, figs. 1—13 (1847). 
Notodelphys ascidicola, Baird, ‘‘Brit. Entom.,” p. 2388, pl. xxx., figs. 7 
and 8 (1850). 
Notodelphys allmani, Thorell, ‘‘ Bidrag till Kinnedomen om Krustaceer 
som lefva i arter af Sligtet Ascidia,” p. 31, tab.i. andil., fig. 1 (1859). 
A few specimens, male and female, were found by Prof. 
Herdman in the branchial sacs of the Ascidian, Cizona 
intestinalis, dredged in the ‘‘ Weathercock’”’ expedition of 
1886, and off the south end of the Isle of Man in the 
‘“‘Hyena’’ cruise of 1888. 
Doropygus pulex, Thorell. 
Found by Prof. Herdman in company with the preceding 
species, and also in the branchial sac of Ascidiella seabra, 
dredged in Groudle Bay, Isle of Man; also in the branchial 
sac of Ascidia plebeia, dredged from the ‘‘ Hyzna,”’ off the 
Calf of Man, May, 1888, in twenty fathoms. 
Doropygus poricauda, Brady. 
One specimen of this species was amongst several of the 
