biserial ; dorsal tentacula serrated, orals long; anterior angles of the foot greatly 

 produced. Length 1 inch. 

 Hab. China. 



37. GYMNODORIS, n. g. Limaciformis, Iffivis. Polycers affinis, sed appen- 

 dicibus branchiarum veloque carens, diversa. Branchiae etiam simplices. 



38. Gybinodoris maculata. Elongated, obtusely rounded before, tapering 

 posteriorly to a slender pointed extremity ; body smooth, translucent, of a pale 

 brownish color, spotted with bright yellow ; a ring of flake-white around the 

 base of the branchiae. Tentacula shore, with eight oblique, dark brown laminje ; 

 branchiae consisting of nine slender, transparent, unbranched leaflets, with blunt, 

 rounded, bright yellow extremities. Length | inch. 



Hab. Loo Choo. 



39. PoLYCERA ? RAMULOSA. Large, higher than broad, swollen at the middle ; 

 back with a row of small branching processes along each side, those opposife 

 the branchiae bulbose ; head large, rounded above, subtruncate ; veil separated 

 as far as the tentacula, with a pectinated margin ; tentacula clavate, finely 

 25-laminate; branchiae small, ramose, with five principal trunks ; color greenish 

 with blackish patches ; a few orange dots on the sides. Length 2 inches. 



Hab. China. 



40. Idalia tbntaculata. Very small, suboblong, pointed behind ; having two 

 large frontal cirri, and sixteen lateral ones, eight on each side, the posterior ones 

 bifurcate ; head produced at the sides ; tentacula very large, clavate ; branchiae 

 consisting of four thick tentaculiform processes, dentated along the inner sides, 

 in front of which on the middle of the back arises a single, very long cirri- 

 form appendage; color pale wine-yellow, with brownish spots along each side of 

 the flake-white median line; tentacula and brancbias chestnut-brown. Length 

 J inch. 



Hab. China. 



41. HEMIDORIS, n. g. Pallium postice adnatum. Reliqua ut in Doridibus. 



42. Hemidoris ccbruleata. Elongated-ovate, broad in front, convex along the 

 middle and depressed at the sides ; foot concealed by the mantle except posterior- 

 ly where they coalesce, the foot being produced for some distance beyond and 

 tapering to a point; mantle smooth, light-blue, margined with yellow; dorsal 

 tentacula 10-laminate, dark reddish-brown ; orals oblong; branchiae consisting 

 of nine slender, simply pinnate leaflets of a reddish color. Length I inch. 



Hab. China. 



43. Doris indtjrata. Ovate, broadest posteriorly ; mantle covered with small 

 hard tubercles, somewhat distantly arranged in quincunx ; tentacula thick, 

 pedunculate, 12-laminate ; branchiae with five well-branched plumes; head very 

 small, foot narrow in front and broadly rounded behind ; color lemon-yellow with 

 flake-white spots ; branchiae dark orange. Length 1 inch. 



Hab. China. 



44. Doris gibberosa. Thick, slightly broadest before ; tubercles of the mantle 

 hard, rugose, very large along the middle of the back ; foot produced beyond the 

 mantle behind ; "tentacula somewhat elongated, finely laminate, issuing from a 

 pair of the larger tubercles ; branchiix? large, frondose, of five plumes ; color dark 

 yellowish, tubercles purplish-brown, tentacula brownish-grey with white tips ; 

 branchiae lemon-yellow. Length 1} inch. 



Hab. China. 



45. Doris ohvacea. Large, thick and strong, rufrose, half as broad as long, 

 dark olivaceous ; mantle with large greenish tubercles, largest ab-ut the middle ; 

 dorsal tentacula smoothish, with conical 20-lamindte extremities ; orals oblong ; 

 branchial plumes largest. Length 3 inches. 



Hab. Loo Choo. 



46. Doris rogersii. Convex, oval, of a pale-brown color with darker clouds 



