| Authors(s) | Cornelius P.F.S. | 
| Year | 1995 | 
| Title | Thecate hydroids of the North-west Europe and their medusae. Synopses of the British fauna, N.S. 50, Part 1 (pp. i-vii+1-347), Part 2 (pp. i-vii+1-386), Linnean Soc. London. | 
| Authors(s) | Cornelius P.F.S. | 
| Year | 1995 | 
| Title | Thecate hydroids of the North-west Europe and their medusae. Synopses of the British fauna, N.S. 50, Part 1 (pp. i-vii+1-347), Part 2 (pp. i-vii+1-386), Linnean Soc. London. |