178 
Prof. McIntosh’s Notes from the 
few were mature at the beginning of the month, but the 
majority were immature or had spawned. This corresponds 
with the condition in the Neapolitan forms. 
The Annelids mentioned as occurring in April likewise 
were present in May, while there was a decided increase in 
the larval forms pertaining to other genera. Thus trocho- 
spheres of Phyllodoce and Eulalia frequently appeared along 
with young Magelonce ) which agreed in most points with the 
description and figures of Claparbde, though he does not make 
it clear that the young Magelona has at first only slender 
spine-like papillae on its elongated tentacles, as in Spio, and 
that the characteristic thick cylindrical ones are developed 
first at the base. Thus in some pelagic examples about 
4 millim. in length (body) both kinds exist on the organs. 
The young forms referable to Claparkde’s fig. 12, Taf. x.*, 
seem to be /Sjpfo-like, and show no circulation of corpuscles in 
the tentacles, while those resembling his fig. 10 have active 
corpuscular circulation in the tentacles, the distal parts of 
which are readily lost. Moreover, the former is occasionally 
considerably larger than the latter. When the circulation is 
established in the tentacles a small rounded black eye appears 
at the anterior and inner border of each tentacle, while two 
small and indefinite pigment-specks occur on each side of the 
middle line in front of the mouth and nearly in a line with 
the outer eyes. Further investigation therefore is necessary 
to clear up the doubtful points. These young examples swim 
freely, with a wriggling motion, after coiling the long tentacles 
like a spring, and again settle on the bottom or at the surface 
and stretch out the two long tapering tentacles. Numerous 
young Terebellids in the transparent sheaths were common 
in the bottom-nets. 
The only form observed in the midwater-net during June 
was Tomopteris, which appeared once in considerable numbers 
and from 1 to inch in length. Numerous ova occurred in 
the perivisceral diverticula of the feet. Chsetognaths were 
obtained in the same net, but they were comparatively few 
and small, only the larger forms reaching 15 millim. This 
therefore differed from the condition during the winter 
months, when the bay teemed with large and active SagitUe. 
The bottom-net was extremely rich as the month advanced in 
larval forms of Nerine (two species), Polydora , and other 
Spionidas, such as Magelona . Young Harmothoe imbricata 
with four scales and seven bristled feet, advanced young of 
Nephthys with a pair of eye-spots opposite the third bristled 
Beobaeh. iiber Anat. u. Entwicklungsgesch. &c. (Leipzig, I860), 
