148 
BULLETIN OF THE BUREAU OP FISHERIES 
tering individuals being taken until November 12, when the last specimen was ob- 
served. In 1923 the first nauplii appeared on August 12 (fig. 49). 
Balanus halanoides appeared first on December 16, 1922 (fig. 48). By January 1 
great numbers filled the tow. An examination of adults at this time showed that 
almost every specimen was filled with young and all seemed to be at exactly the 
same stage of development. In 1923 the first nauplii appeared on December 7 
(fig. 49). On February 8, 1923, the first "cypris larvae" appeared. These were 
at all times far less abundant that the nauplii. Throughout February and March 
they continued to appear, declining in April, although a few specimens were found 
in every haul. In certain parts of Long Island Sound, on March 5 and 6, the 
''cypris larvse" were exceedingly abundant. The season in 1899 and 1900 coin- 
cided exactly with that of 1922 and 1923. 
A comparison of this locality with other places along the coast is necessary 
in order to understand the relative position of Woods Hole. In Massachusetts 
Bay Bigelow foimd nauplii of Balanus halanoides throughout March and early 
April, 1913. Nauplii swarmed off Boon Island on April 5 of the same year. By 
April 9 large numbei's of the "cyprids" with few nauplii were observed, while 
collections of seven days later revealed only " cyprids." These were most niunerous 
from April 25 to 30, when they formed the bulk of the macroplankton, and con- 
tinued to appear as scattered forms imtil the middle of May, when all had practi- 
cally disappeared. 
In early March swarms of Balanus were found in the "cjpris stage" among 
the Fucus along the shores of upper Narragansett Bay. Some were already 
attached. In Newport Harbor the author found large niunbers of nauplii from 
January 25 to 31, 1922. The largest swarm appeared on January 30. On March 
4 of the same year "cyprids" literally filled the waters in the harbor of Bristol, 
R. I. It was not possible to carry on further observation in this locality, so the 
duration of the season was not determined. The author has taken nauplii in 
upper Narragansett Bay in large numbers in late January. 
From these records it appears that the breeding season in Narragansett Bay 
and vicinity is somewhat later than at Woods Hole. This may be because the 
water responds more quickly to sudden drops in air temperature and retards the 
developing eggs. As one goes farther north the season grows later. Thus, Dr. 
Bigelow found that the breeding time starts in March in Massachusetts Bay and 
terminates quicldy, due to the apparent rapid development of the larvae. In 
Newfoundland the breeding season of this species is in Jtme and July. 
Chthamalus stellatus, although quite abimdant locally, appeared in very small 
numbers in the plankton on only two days in 1922 — August 15 and 16. No "cyprid 
larvae" were foimd. In 1923 a single specimen was taken on July 23. 
A single nauplius of Lepas appeared in the collections on September 30, 1922. 
This larva often occurs locally, although the adults are not real residents of the 
region but are blown in by southerly winds and often appear in great numbers on 
floating logs and Sargassum. During such seasons the larvae of several species 
are frequently found. 
