Genus 19. ANTIOPA, Aid e r and H ancock.
Branchiae arranged on a pallial ridge on the sides of the back and in front of the head.
Dorsal tentacles laminated, united by a semicircular crest. Oral tentacles with or without a
veil. Fam. 3, PI. 43. i n '
Tongue broad, with numerous lateral spines and a central one, all simple. Corneous jaws.
1. A. c r ista ta , Bella Chiaje. Transparent buff-coloured or white; branchiae o v a te - o b lo n g , inflated,
with a slender brown central vessel furcated above, the apices of a brilliant opaline blue;
dorsal tentacles strongly laminated. Length 1J itach. PI. 44, figs. 1 7.
2. A. h y a l in a , A. and H. Pellucid, yellowish with brown markings down the middle of the back;
branchiae elliptical, tuberculated, hyaline, with the central vessel fulvous; dorsal tentacles
obtuse, obscurely laminated; oral tentacles united by a narrow veil. Length ft inch. PI.
44, figs. 8—12.
