26 PROCEEDINGS OF THE NATIONAL MUSEUM vol.80 



developed, this copepod is one of the chief causes of marine phosphor- 

 escence. It was reported by Farran as forming with Calanus fln- 

 fnarchicus the main bulk of the tow on the Irish fishing grounds 

 during spring and early summer, and as constituting an important 

 factor in the food of the mackerel. 



PARACALANUS PARVUS (Clan«) 



Calanus parvus Claus, Die frel lebenden Copepoden, p. 173, pi. 26, figs. 10-14; 



pi. 27, figs. 1-^, 1863. 

 Paracalanus parvus G. O. Sabs, Crustacea of Norway, vol. 4, p. 17, pis. 8, 9, 1901. 



Occurrence. — Found at every station in the bay except T and U, 

 usually in considerable abundance in the outer bay, but gradually 

 diminishing in numbers toward the inner end of the bay. Taken 

 indiscriminately in surface, bottom, and vertical nets. Most abun- 

 dant during autumn in the outer bay and during winter in the inner 

 bay, but present everywhere throughout the year. Also found in 

 large numbers in every haul but one during the trip to the 100- 

 fathom line in the outside ocean. 



Retnarks. — Wheeler's record was the first for our American shores, 

 and the present one carries the species as far south as the Chesapeake. 



PONTELLA ATLANTICA (Milne-Edwards) 



Pontia atlantica Milne-Edwards, Histoire naturelle des Crustac6s, vol. 3, 



p. 420, pi. 37, figs. 4-17, 1840. 

 Pontella atlantica, Giesbeecht, Fauna und Flora des Golfes von Neapel, vol. 



19, p. 461, pi. 24, figs. 1, 3, 13, 45, 49, 50; pi. 40, figs. 5, 8, 12, 13, 83, 41, 



42, 1892. 



Occurrence. — A few specimens of this species were taken in the 

 bottom net at the 100-fathom line outside the bay. 



Remarks. — This is another pelagic form and is not likely to be 

 found within the limits of the bay. Although reported by many 

 authors from the Atlantic Ocean, the localities given are all eastern, 

 and it has not hitherto been found upon our American shores. It 

 is the largest species of the genus and was given the specific name 

 magna by Lubbock in 1853, and gigantea by Claus in 1863, both of 

 which become synonyms of Milne-Edwards's name, given in 1840. 

 Now that it has been found on this side of the Atlantic, this last 

 name becomes even more appropriate. In spite of its size it has 

 never been found in sufficient numbers to become of economic im- 

 portance. 



PONTELLA MEADII Wheeler 



Pontella meadii Wheeler, Bull. U. S. Bur. Fisheries, vol. 19, p. 180, fig. 17, 

 1900. 



Occurrence. — Numerous specimens of both sexes were taken in the 

 surface and vertical nets at Station F, August 22, 1920, and in the 

 bottom net October 21. A few others were obtained at Stations 



