190 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
Doropygus poricauda, Brady. (Pl. XVIII, fig. 1.) 
Length 2.50 mm. One specimen of this species was 
amongst several of the last preceding taken from the 
branchial sac of Asczdia plebera. 
Doropygus gibber, Thorell. (Pl. XVIII, fig. 2.) 
Length 3.20 mm. Found in the branchial sac of 
Ascidia plebera dredged from the ‘‘ Hyzena”’ in 1890. 
Botachus cylindratus, Thorell. (Pl. XVIII, fig. 3.) 
Length 1.75 mm. Found by Professor Herdman in 
the branchial sacs of A sctdia mentula and Ascidia plebera, 
from the Isle of Man. 
Thorell and so far as I know all subsequent observers 
have failed to find the male of this species. In each of 
the several ascidians in which the females were found were 
a few minute specimens which generally correspond to 
the males of other species and are evidently the male of 
Botachus cylindratus. (Fig. 8. a.) Prof Herdman tells 
me that they were in appearance lke minute commas 
attached to the mner folds of the branchial sac of the 
Ascidian, and from their minute size and very tenacious 
hold might easily be overlooked. 
Ascidicola rosea, Thorell. (Pl. XVI, fer) 
Length 3.75 mm. Several specimens of this species 
have been found in the branchial sacs of Ascidians dredged 
off the Isle of Man. 
Notopterophorus papilio, Hesse. (Pl. X ViGp fteshouas 
A few specimens of each, male and female of this most 
remarkable and beautiful Copepod were found in Ascidians 
dredged in Garwick Bay, Isle of Man by Prof. Herdman. 
The female is described by Brady (Copepoda of British 
Islands, Ray Society, Vol. I, p. 142) from Hesse’s first 
memoir in which no mention 1s made of the male. It was 
subsequently however found by him and briefly described 
in a later paper but not figured. It is about 2 mm. in 
length, the female measuring about double that size. 
