274 
12 
we 
I think this form is nearly allied to Triceratium (Odontella discigera 
var.?) Californicum Grun. in V. H. Syn. tab, CVIIL, fig. 11 (from Dépét 
de Santa Monica). 
Biddulphia Gray. 
37. B. aurita Lyngbye. V.H. Syn. tab. CXCVIII, fig. 4. 
KKt (2 samples). 
Area: Atlantic coasts of America and Europe, Arctic Ocean, Madagascar, 
Java. 
38. B. membranacea Cl. Leud. Fortm. Afr. occ. tab. VII, fig. 1 & 4. 
KCn, KKt (3 samples). 
Area: Ile St. Thome (Lend. Fortm.), Honolulu, Ceylon, Malay Archi- 
pelago. 
Tab. 
39. B. minutissima Grev. Grev. South. Pacif. tab. VI, fig. 14. 
Solitary in a sample from KKt. 
Area: Zanzibar. In a dredging off the island of Arran (Greville). 
40. 8. pulehella Gray. V.H. Syn. tab. CXCVIIE, figs. 1-—3. 
KKm, KKt, K Mn--CLt (17 samples). 
Area: probably ubiquitous. 
41. B. reticulata Roper. V.H. Syn. tab. CI, figs. 1—2. A.S. Atl. 
LXXVII, fig. 22. 
KKt, KMn—CLt (6 samples). 
Area: Ceylon, Natal, Honduras, Madagascar, Malay Archipelago, Tahiti. 
Samoa, Hawaii. 
— — forma trigona. V.H. 1. c. fig. 3. 
Only found in a sample without habitat. 
Area: Madagascar, Java. 
42. B. Tuomeyi (Bail.) Roper. V.H. Syn. tab. CXCVII, figs. 1—2. 
KKm, KKt, KMn—CLt (5 samples). 
Area: Campeachy Bay, Campeachy Bank, Mediterranean, Mazatlan, Val 
paraiso, Nankoori, Madagascar, King Mill Island, Malay Archipelago. 
Isthmia Ag. 
43. I. nervosa Ktz. W.Sm. Syn. tab. XLVIL 
Solitary in a sample from K Kt. 
Area: Sct. Francisco, Honduras, Europe, Arctic Ocean, Madagascar, 
Kerguelen. 
