MEDUSAE CRASPEDOTAE. 15 



41. Obelia longissima (Pallas) Hincks. 



Sertularia longissima'PaWa.s, Elenchus zoophytorum, 1766, p. 119. 



"OCEANIIS EUROPAEUS. . . .IN MaEI BELGIUM." 



Obelia longissima Hincks, British hydroid zoophytes, 1868, p. 154, 

 pi. 27. 



Common on both sides of the North Atlantic. 



Me. — Casco Bay. 



Mass; — Woods Hole, and 40 miles southeast of No Man's 

 Land. 



42. Obelia gelatinosa (Pallas) Hincks. 



Sertularia gelatinosa Pallas, Elenchus zoophytorum, 1766, p. 116. 

 "Mare Belgium alluens." 



Obelia gelatinosa Hincks, British hydroid zoophytes, 1868, p. 151, 

 pi. 26, figs. 1, 1', la. 



Abundant in the Mediterranean, and both sides of the North 

 Atlantic. Not known north of Cape Cod. 



Mass. — Vineyard Sound. 

 R. I. — Coast. 

 Conn. — New Haven. 



43. Obelia commissuralis McCrady. 



McCrady, Proc. Elliott soc. nat. hist., 1857, vol. 1, p. 197, pi. 11, 

 fig. 5-7. "Sullivan's Island, [South Carolina]." A. Agassiz, 

 Mem. Mus. comp. zool., 1865, vol. 1, no. 2, p. 91, figs. 134, 135. 



Abundant along the New England coast. 



Me. — Eastport region. 



Mass. — Massachusetts Bay, Woods Hole region. 



R. I. — Newport. 



44. Obelia DiCHOTOkA (Linne) Hincks. 



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

 "In Oceano." 



