MOLLUSCA GASTEROPODA. 429 



Elysia (Actecon) fit sea, Philippi (Eiumi. p. 100). Small, fuscous, darker 

 above, beneath with red points, with expanded wings. 



Janus, Verauy, iiov. geu. (Rev. Zool. p. 302). Head distinct, with a 

 tentacular prolongation anteriorly on each side, two non-retractile conical 

 dorsal tentacles, on a thick common base, eyes sessile, indistinct, behind the 

 base of the tentacles. Branchiae as in Eolis, consisting of numerous cylin- 

 drical filaments, placed in longitudinal rows on the sides of the back, but 

 which extend so far anteriorly and posteriorly, that the rows of the two 

 sides meet. Anus posteriorly in the median line of the back. Common 

 genital aperture in a tubercle, anteriorly, on the right side. The species 

 is not named. 



Lomanotus, Verauy, n. gen. (ib.) Head as broad as the body, anteriorly 

 with a frontal veil (stirn segel), which supports on each side minute ten- 

 tacular prolongations. Two retractile, clavate dorsal tentacles, placed in a 

 basin-shaped sheath. The brauchise consist of two thin, fringed organs, 

 which are situate on each side between the dorsal and lateral surfaces of 

 the animal. Anus and genital apertures as in Tritonia. The species is not 

 named. 



Psiloceros, Menke, u. gen. (Zeitsch. p. 149). Animal limaciforme ; ten- 

 tacula front alia quatuor, basi uuda ; ramenta labialia nulla ; brauchise dor- 

 sales siinplices serie longitudinal! duplici digest*. The species, Ps. claviger, 

 is figured by Bomme in ' Verhandelingen te Vlissiugen,' D. 3, p. 296, No. 4, 

 fig. 3, but differs from Doris clavigera, Mull., and Doris fimbriata, Valil. 



From Polycera pnnctilucens, d'Orb., Loven forms a new genus, (Eyires : 

 Corpus robustuni, gibbuin; e spiculis uumerosissimis rigidum ; pallium 

 adnatum, a solea sulco clistinctimi, tuberculosum ; vibracula cylindrica, 

 simplicia, nee perfoliata, intra vaginam retraheuda ; branchiae aiio prapositse, 

 pinuata-, paucilobse, lobo quovis papilla defense ; velum abbreviaturn, rotun- 

 datum. To this genus, besides the above species, also belongs Doris maura, 

 Forbes. (Ofversigt af Kongl. Veteuscaps Academieus Forhandlingar, 

 1844, p. 49.) 



The same naturalist describes (ib.) a new species, Stiliger modestus, differ- 

 ing from S. ornatns, Ehrb., in the shorter vibracula and broader foot. 



Cloelia, new genus, (id. ib.) Corpus gracile, solea latiuscula; pallium 

 adnatum ; vibracula simplicia, indefensa, contractilia ; branchiae laterales, 

 utrinque simplici serie, fruticidosa3 ; velum labiale amplum, in lobum oblou- 

 gum utrinque productum. To this, besides a new species, C.formosa, is 

 also to be referred Doris fimbriata, Vahl. 



Herm&a, new genus, (id. ib.) Corpus gracile, molle elongatum ; vibracula 

 auriform ia, extus canaliculata ; branchiae laterales ; velum breve, in lobum 

 minutum utrinque productum ; solea angusta, antice dilatata ; anus sub- 

 lateralis ; porus genitalium anticus, lateralis. To this belong Doris bifda, 

 Mont., and a new species, H. renow. 







