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Genus TheUs, L. 



T. lepovina, *L. Rare. Found near the shore in the Grand 

 Harbour and in Marsamuscetto, and also out at sea. 



Genus Doris, L. 



D. argus, L. * Rare. 



D. limbata, Cuv. * With varieties. Common at the Marsa. 



D. verrucosa, L. * Found at the Marsa- 



D. granulata, Nobis. * Under the Lower Barracca. 



D. elephantiaca f , Nobis. * 



Amongst Mr. Mamo's loose papers I have found the follow- 

 ing description ol D. elephuntiaca : — 



f Corpore ovali, oblongo, convexo-botroideo, pallio olivaceo 

 fuscente tuberculis magnis globuloso-verruciformibus, 

 aliisque minoribus intermediis ad peripheriam decrescen- 

 tibus. Branchiis sexdecim, sublividis, vergato-palmatis, 

 circularibus, subrevolutis j sfinctere ani conico, interme- 

 dio albo. Lmibo fovearum pro antennis trilobo, lobis 

 erectis lateralibus opposite cochleatis, tertio postico coni- 

 formi mia imo. Ciavis tentaculorum albidis, conicis, 

 longiusculis, striato-scobinatis, apicibus camicinis. Pede 

 maguo e paliio uudique obducto, solea fiavidula, apice 

 acuminato longiore. 



Millimetra 63 longa, 37 lata. 



The first specimen was caught on seaweed at the Marsa, in 

 the Great Harbour, on the 2Gth January, 1846. 

 D. marmorea, f Nobis * , un limbata, Cuvier, varietas altera ? 



t Corpore ovali, oblongo, subprismatico, lsevi, superne con- 

 vexo, isabeliico, 1'usce et nigre maimoruto, limbo pallii 

 unduiato croceo ; tentacuiis superis ovatis, pedunculatis, 

 nigris, apice albis, antice uniangulatis, oblique laminato- 

 rugosis, refiexis, pedunculis conicis basi latis e foveis 

 nudis se exerentibus. Branchiis plumis fuscis, magnis 8-9 

 farie ramosis, bipinuatis. Ano, conicr, intermedio ad ter. 

 tium posticum dorsi subtus antrorsum prope basim pallii, 

 Tentaculis oralibus veluti uppendice labriformi lata, biLbu, 



