192 — 



I think this form is nearly allied to Triceratium (Odontella discigera 

 var. ?) Californicum Grun. in V. H. Syn. tab. CVIII, fig. 1 1 (from Dépôt 

 de Santa Monica). 



Biddulphia Gray. 



37. B. aurita Lyngbye. V. H. Syn. tab. GXCVIII, fig, 4. 

 KKt (2 samples). 



Area: Atlantic coasts of America and Europe, Arctic Ocean, Madagascar, 



Java. 



38. B. membranacea Gl. Leud. Fortm. Afr. occ. tab. VII, fig. 1 & 4. 

 KCn, KKt (3 samples). 



Area: He St. Thome (Leud. Fortm.), Honolulu, Ceylon, Malay Archi- 

 pelago. 



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 (G re ville). 



40. B. pulchella Gray. V. H. Syn. tab. GXGVII, figs. 1 — 3. 

 KKm, KKt, KMn— GLt (17 samples). 



Area: probably ubiquitous. 



41. B. reticulata Roper. V. H. Syn. tab. CII, figs. 1-2. A. S. Atl. 

 Tab. LXXVIII, fig. 22. 



KKt, KMn— GLt (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. GXCVIII, figs. 1-2. 

 KKm, KKt, KMn— C Lt (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. XL VII. 

 Solitary in a sample from KKt. 



Area: Set. Francisco, Honduras, Europe, Arctic Ocean, Madagascar, 

 Kerguelen. 



