lerneaile. 307 
of life they approach more closely to this latter order than 
any other family of the Siphonostoma. 
1. Nicothoe astaci. Tab. XXXIII, fig. 11. 
Nicothoe astaci, Audouin and M. Edwards, Ann. Sc. Nat., 1st series, 
ix, t. 49, f. 1-9. 
— Latreille, Cuv. Regne Anim., iv, 202. 
— Burmeister, Nov. Act. Nat. Cur., xvii, 327. 
— Guerin, Icon. Regne An. Crust., t. 35, f. 12. 
— Kroyer, Tidsskrift, ii, t. 3, f. 7. 
— ■ M. Edwards, Hist. Nat. Crust., iii, 481, t. 40, f. 23. 
RathJce, Nov. Act. Nat. Cur., xx, 102, t. 5, f. 1-10. 
Character . — The length of this species is about two 
lines, and the colour is of a rosy hue. It is as yet the 
only known species of the genus. 
Hah. — On the gills of the common lobster. London 
market, March and April, 1849 ; W. B. Falmouth, Sept. 
1849 ; W. P. Cocks, Esq. British Museum. 
Okdeb. II — LERNEADiE. 
Mouth suctorial. Thorax not articulated. Feet and 
other organs belonging to thoracic segment nearly rudi- 
mentary. No eyes. Body very outre in appearance. 
Bibliographical History and Systematic Arrangement . — 
The existence of the Lernese seems to have been known 
to the ancients. Aristotle informs us, in his ‘ Historia 
Animalium/ that the tunny and sword-fish are tormented 
by a sort of worm, which fastens itself under the fin, and 
causes such irritation to the animal, that it often leaps out 
of the water, and falls on board of ships.* Pliny repeats 
* “ Thunni et gladii agitantur asilo cams exortu, habent enim utrique 
per id tempus sub pinna ceu vermiculum, quem asilum vocant, effigie scor- 
pionis, magnitudine aranei ; infestat hoc tanto dolore, ut non minus interdum 
gladius quam delphinus exiliat, unde fit, ut vel in navigia ssepenumero in- 
cidat.” — Lib. viii, cap. 19. 
