176 
Prof. McIntosh’s Notes from the 
Arenicola , and yet the latter has been found equally mature 
in October. The Polynoidae especially are early in this 
respect both in Europe and America. None of their pelagic 
larvae, however, have hitherto been found at St. Andrews m 
January. Hensen*, again, in the Baltic procured only a very 
few larvae of Polydora during this month. 
Tomopteris at St. Andrews occurred on many occasions ; 
indeed its absence from the tow-nets was rarer than its 
presence. 
Sagittce of various sizes were abundant and some were 
large, with advanced reproductive 
organs, as Lo Bianco and others 
found at Naples. Their occurrence 
in large numbers in winter has long 
been known j", and the multitudes of 
fine living examples stranded on the 
beach sparkle like needles of glass. 
The larger forms (about 1 inch) were 
captured in the midwater-nets and the 
smaller (about \ inch) in the surface- 
and bottom-nets. A considerable 
number of the larger specimens had a 
parasitic Nematoid in the alimen- 
tary canal, while some presented a 
Trematode in the same situation (see 
woodcut) . 
Next month (February) the pelagic 
Annelids were represented by females 
of Autolytus with the ventral ovige- 
rous sac and males. The midwater- 
net also captured an epitocous Nereis 
(olim Iphinereis fucicola), which in Trematode at anal septum 
former years had been tossed on shore ^ a ddta. 
by storms. Young Polynoidae ( Har - 
mothoe imbricata &c.) escaped from the ova in the tanks, but 
none were recognized in the contents of the nets. The larval 
Nerine with the reticulated investment, and which has also 
been found in the Forth in February by Messrs. Cunningham 
and Ramage j, and larval examples of Polydora also occurred. 
In regard to the latter, Hensen found this month and the 
next most prolific of them in the Baltic, and he gives the 
spawning-period as from October to April. The bristles 
* Fiinfte Bericlit der Komission &c. (Berlin, 1887). 
t Vide Ann. & Mag. Nat. Hist. 4th ser. xiv. p. 155 (1874). 
X Trans. B. Soc. Edinb. vol. xxxiii. pt. 3, p. 638, pi. xxxvii. fig. 2 h. 
