14 FAUNA OF NEW ENGLAND. 



Me. — Eastport region, Casco Bay. 



Mass. — Massachusetts Bay, Nahant, Boston, Cohasset, Cape 

 Cod, Woods Hole. 



38. MiTROCOMA CRUCiATA (A. Agassiz) Mayer. 



Halopsis cruciata A. Agassiz, Mem. Mus. comp. zool., 1865, vol. 1, 

 no. 2, p. 102, figs. 151, 152. "Massachusetts Bay, Nahant." 



Mass. — Massachusetts Bay. 



Gulf of Maine, northeast part. ■ 



Probably the same as the European M. annae Haeckel. 



EUCOPIDAE. 



39. Obelia geniculata (Linne) Allman. 



Sertularia geniculata Linne, Syst. nat., ed. 10, 1758, vol. 1, p. 812. 

 "InOceano." 



Eucope diaphana A. Agassiz, Mem. Mus. comp. zool., 1865, vol. 1, 

 no. 2, p. 83, fig. 115-125. 



Obelia sp. (geniculataf) Bohm, Jena, zeitschr., 1878, vol. 12, p. 

 174, pi. 3, fig. 1-34. 



A world-wide species, abundant on the New England coast. 



Me. — Penobscot Bay, Casco Bay. 



Mass. — Massachusetts Bay, Woods Hole region. 



R. I. — Newport. 



40. Obelia plana (M. Sars) Haeckel. 



Thaumanfiasf plana M. Sars, Beskrivelser og jagttagelser, 1835, 

 p. 28, pi. 5, fig. 13a-13g. "Floroen om Foraaret," Norway. 



Obelia fiabcllata Hincks, British hydroid zoophytes, 1868, p. 157, 

 pi. 29. 



Rocky tide-pools on both sides of the North Atlantic. 



Mass. — Nahant, off Thimble Island, 4 to 5 fathoms. Woods 

 Hole. 



