of Nudibranchiate Mollusca. 191 



hood, with two short oral tentacles. Foot lemon-yellow, trans- 

 parent, rather broad and arched in front, with a notch in the 

 centre and very obtuse angles at the sides. The sides are thiu 

 and undulated, tapering gradually to the tail, which is a little 

 produced beyond the branchiae. Length an inch and a quarter. 



There is a very conspicuous aperture at the end of each pa- 

 pilla, which is opened and closed at intervals. When closed the 

 papilla terminates in a point, but the apex has a rounded form 

 when the aperture is opened. The gastric vessels are very visible 

 through the skin, running along each side of the back and 

 branching into the papillae, giving that part a dendritic appear- 

 ance. 



The first specimen taken of this fine mollusk was dredged in 

 Torbay by Dr. Battersby, and communicated to us through the 

 kindness of Mrs. Griffiths. We afterwards dredged three or 

 four in Fowey Harbour, Cornwall. ^^ 



Tritonia lineata. ^ , 



Body very slender, pellucid white, with an opake white line . I 

 along each side of the back, which is curved a little outwards f 

 opposite each branchial tuft. Veil produced into four long fila- 

 ments ; the two nearest the centre longest and tapering gradually 

 to a point, the side ones shorter and obtuse. Tentacles pale 

 yellow, the fasciculse of filaments slender, and the sheaths rather 

 tight. Branchiae rather slender, bipinnate, transparent, with an 

 opake white line in the centre of each running into those on the 

 back. Foot slender, rounded in front and terminating in a 

 point behind. Length half an inch. 



This beautiful new Tritonia was discovered under stones at 

 Scarborough in September 1846, while we were exploring the 

 rocks in company with Mr. Bean. 



Eolis Peachii. 



Body rather flat, yellowish white. Dorsal tentacles longish i 

 and smooth. Oral tentacles shorter. Head broad and rounded, 

 angulated at the sides. Branchiae very numerous and thickly set, 

 passing round the dorsal tentacles so as nearly to unite in front, 

 and terminating behind very near the tail. The papillae are 

 nearly linear, slender, with a brownish central vessel, and having 

 the apices sprinkled with opake white spots. Foot rather thin 

 and broad, arched in front, with obtuse angles. Length three- 

 quarters of an inch. 



An adult specimen was dredged by Mr. Peach in Fowey Har- 

 bour, and we got two or three young ones from the same locality. 

 More recently we have obtained a single individual at Culler- 

 coats. 



