CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA. 
By ALFRED GOLDSBOROUGH MAYER. 
This research was begun in 1892 at the suggestion of Prof. Alexander 
Agassiz, while I was a student in his excellently equipped marine labora- 
tory at Newport, Rhode Island. Until 1900 Professor Agassiz did all 
in his power to encourage these studies, and I now publish the final 
results in the hope that by so doing I may present them as a tribute of 
respect and gratitude to the memory of Alexander Agassiz to whose 
generous aid and unselfish interest so many young men have owed their 
impetus toward research in science. 
It is a pleasure to express my appreciation of the kindness of the 
Honorable Mr. A. W. Piccott, Minister of Marine and Fisheries of New- 
foundland, who cordially extended toward me every personal and official 
courtesy while I was engaged in the study of the ctenophores of the 
Newfoundland coast in September, 1910. 
During the past seven years at the Tortugas Laboratory of the Car- 
negie Institution of Washington it has been my custom to go out upon 
the ocean during periods of tropical calm, when the surface is unrippled, 
and to dip up the Ctenophores in glass vessels and transfer them to the 
laboratory for study. All but three of the species of Ctenophore described 
from American North Atlantic waters have come under my observation, 
and descriptions of these three, Lesueuria hyboptera, Ocyropsis maculata, 
and Tyalfiella tristoma are introduced in order to present an account of 
all ctenophore known from the Atlantic coast of North America. The 
species herein described are as follows: 
; Spzcrzs, * . Gmocrapuicat RANGE, 
Mertensia ovum... ccc ccc cee ceeeeee Arctic to southern coast of New England. 
* Pleurobrachia pileus..... 0.0... e ee North of Cape Cod in summer, driven south- 
ward in winter. 
5 brunnea sp. nov...... Coast of New Jersey. 
Hormiphora plumosa.........0..-. Mediterranean and tropical Atlantic. 
Tinerfe lactea sp. NOV......+...0.0. Tortugas, Florida 
beehleri sp. nov............ Tortugas, Florida. 
+ Lesueuria hyboptera (problematical). Coast of Massachusetts north of Cape Cod. 
, Bolinopsis infundibulum. .......... Arctic to Cape Cod. 
UU ED eta ee Wisi ace GOR eek Tropics, West Indies, Florida, Mediterranean. 
' Mnemiopsis leidyi................. Vineyard Sound to South Carolina. 
MCCYAGYL. 0... eee ee Tropics to South Carolina. 
Ardent.......005- ....Chesapeake Bay to northern Florida, 
Leucothea ochracea sp. nov...... -,,. Tortugas, Florida. 
Ocyropsis crystallind...........6.. '. Tropical Atlantic. 
MACUALA... eee eee Tropical Atlantic and Pacific. 
Eurhamphea vexilligera........644. Mediterranean and tropical Atlantic. 
A COSLUM VENETIS. Coco ccc cece ne ne Atlantic, Pacific, and Mediterranean, 
Folia parallela....... 006s cece eee Mediterranean to tropical Atlantic. 
Bero€ ovata... .. ccc cc cece Mediterranean, tropical and temperate Pacific. 
and Atlantic. 
Beroe CUCUMIS....0 0. vce Arctic Ocean to Cape Cod, 
Tjalfiella tristoma......... 0.00 eee West Coast of Greenland. 
