of British Mollusca. 75 



Genus 5. Ancula, Lovdn. 



92. Ancula cristata (Alder). 



Shetland [A. M. X.), Moray Firth {Gordon), St. Andrews 

 {M'Intosh), Plymouth {Garstang). 



Taken abundantly at Hilbre Island, Cheshire, by Prof. 

 Herdman, who found one specimen " entirely of a hyaline 

 transparent white colour, without, any yellow markings on 

 the dorsal papillse, and with no opaque white pigment on any 

 part of the body." iVrran, N.B., and Firth of Forth ( Herd- 

 man). 



Distrihution. Boulogne {Bouch. - Chant .) ,\)Qwvi\di\\s.{^Krdyer) , 

 W. Norway [G. 0. Sars), Kiel [Meyer & Mobim), Heligo- 

 land {Frey cb Leuckart), Iceland {Morch), Sweden (Loveti). 



Genus 6. Thecacera, Fleming. 



93. Thecacera pemitgei'a (Montagu). 



Off Lowestoft, 16 fath. {Meyer), 20 fath. off Rame Head, 

 Plymouth {Garstang). 



Distribution. Sicily {Quatrefages), N. and N.W. France 

 {Fischer) . 



94. Thecacera virescensj Aid. & Hanc. 

 9o. Thecacera cupitata, Aid. ct Hanc. 



Genus 7. Grimoka, Aid. v& Hanc. 



96. Crimora 2)ajjiUata, Aid. & Hanc. 



The only two known specimens of this Nudibranch are 

 those which 1 took at Guernsey, the one in 1858 the other in 

 1865. They occurred in shallow water. 



Genus 8. Polycera, Cuvier. 



97. Polycera quadrilineata (Muller). 



Shetland and Cumbrae {A. M. N.) ; St. Andrews {M'-In- 

 tosh), Plymouth {Garstang), Moray Firth {Gordon), Firth of 

 Forth {McBain). 



Distribution. Mediterranean {Marion (t'c), Adriatic {Bergh 

 &c.), Kiel (Meyer d; Mobius), Denmark {Krbyer djc), 

 Western France {Fischer), Sweden {Loven), S. and W. Nor- 

 way {G. 0. Sars), Heligoland, 5-6 fath. {Meyer). 



Synonyms. Doris cornuta, Abildgaard, D. Jiava, Montagu, 



