CLGELIA. 7<J 



Genus A.LDERIA, Allman. 



Head without tentacles, produced into a lobe on each side 

 Gills papillose, arranged in transverse rows on the sides of 

 the back. 



Si/n. Stiliger, Lovcn, not Ehrenb. 



Ex. A. modesta, Love//, pi. 67, fig. 3. 



This curious Nudibranch was taken by Dr. Allman in great 

 numbers in salt marshes, near Skibbereen, in the county of 

 Cork ; the head is without tentacles, and there are no jaws. 



Genus STILIGER, Ehrenberg. 



Tentacles two, subulate, simple, contractile. Gills sty- 

 liforin, simple, arranged in rows along the sides of the 

 body. 



Ex. S. ornatus, Ekrei/lerg, pi. 67, fig. 4. 



The tentacles in this genus are non-retractile, simple, and 

 elongate, and the papillary branchias are crowded and dis- 

 posed along the sides of the back. 



Genus CLCELIA, Loven. 



Tentacles two, simple, undefended, contractile, sub-lateral ; 

 a large labial veil, produced on each side into an oblong, flat 

 lobe. Gills simple, papillose, lateral, in a simple series on 

 each side of the back. Foot rather broad. 



Syn. Pterocbilus, Alder and Hanc, not Klug. or 

 Hook. Embletonia, Alder and Hanc. 



Ex. C. pulchra, Alder and Hancock, pi. 67, fig. 5. 



The animals of this genus inhabit the sea-weeds in the 

 laminarian zone ; the head is furnished on each side with a 



