— 291 — 
Dinophysis Ehrenberg. 
38. D. homunculus Stein, I. c. Pl. XXI, f. 2, 5. 
Together with the type there occurs in the Gulf of Siam a form viz. 
f. pedunculata Schm. n. f., which is characterized by the long and 
plainly set off posterior protuberance. 
3(r) ~— 4(r) — 6(+) — 7 (zr). 
Area: General in warmer Seas. 
39. D. miles Cleve, Plankton from the Red 
Sea, Ofv. af Kongl. Sv. Vet.-Ak. Férh. 1900, No. 9, 
p. 1030, Fig. 1; D. aggregata Weber van Bosse, 
Annal. du Jardin Bot. de Buitenzorg, 2° sér., vol. Il, 
p. 140, Pl. XVII, f. 3—4; Heteroceras Schréteri 
Achille Forti, Ber. d. deutsch. Botan. Ges. 1901, 
p. 6, f. I—IL. 
Fig. 8. Dinophysis 
var. indica Ostf. & Schm. 1. c. p. 170. homunculus Stein, 
Q(rr) — 4&(rr). f. pedunculata, 
Area: Indian Ocean. Lateral view. 
40. D. sphaerica Stein I. c. Pl. XX, f.3—4. 
d(rr) — 10 (zr). 
Area: Atlantic, Red Sea, Indian Ocean. 
41. D. rotundata Clap. & Lachm., lc. p. 409, Pl. XX, f.16; Jor- 
gensen, l.c. p.3l. 
5 (rr). 
Area: Atlantic. 
Amphisolenia Stein. 
42. A. bidentata Schréder, 1. c. p.20, Pl. 1, f. 16a—c. 
Q(rr) — 3(rr) — 4 (rr) — 5 (rr) — 7 (rr). 
Area: Mediterranean, Red Sea, Indian Ocean. 
Ornithocercus Stein. 
43. 0. magnificus Stein. ].c. Pl. XXIII, f.1; Schtitt, Centrifugal. 
Dickenwachsthum der Membran, Bot. Ztg. 1900, p. 18 (Sep.), f. 8—10. 
9 (rr). 
Area: Warm Atlantic, Mediterranean, Red Sea, Indian Ocean. 
Murracytae. 
Pyrocystis Murray. 
44, P. Inula Schiitt. 
2 (rr). 
Area: Atlantic, Mediterranean, Red Sea, Indian Ocean. 
