180 Prof. M'Intosh'a Notes from the 



touching the ground. The larval forms of Nerine, Polydora, 

 Pohjnoe, and TereleUa were also obtained ; but this net was 

 less productive oi Polychata than the bottom- net. 



In the surface-net, in addition to the forms already men- 

 tioned, larvEe of Nereis and young forms of Magehna ijapilli- 

 cornis appeared. Tomopteris was procured only once. In 

 the open sea near the Bell Rock the chief novelty was a 

 young example of Hermadion pellucidum. 



Throughout September the bottom-nets were especially rich 

 in the larval, post-larval, and young Annelids, the most con- 

 s})icuous being still those of the Spionidai, e. g, Nerine^ Spi'o, 

 and Folydora^ from the minute larvae with the enormous 

 bristles to the more elongated forms with a pair of tentacles. 

 The fifth body-segment in the Polydorcn showed the charac- 

 teristic bristles with the hook at the tip, and some reached 

 2*5 millim. in length. The abundance of Polydora is not 

 surprising, since it is one of the most common species in the 

 sea, perforating the rocks along the beach and shells — both 

 living and dead — from the tidal margin to deep water. The 

 adult forms of Nerine^ Scolecolejyis, and Sj)w are also very 

 frequent between tide-marks. 



Besides the foregoing was a young Aphrodita 5 millim. 

 long, trochospheres of Polynoidte with post-larval and young 

 forms, a young example of Lcenilla setosissima about 1 

 millim. long with bristles and scales, a young specimen 

 of Pholoe miniita with four pairs of parapodia, a young 

 Nep)hthys with six pairs, a caudal style of two segments 

 articulated like the glandular hair of a plant, and a young 

 Cirratulus about 3 millim. long. Young Phyllodocidje, 

 Terehella, and Ariciidfe, unknown trochospheres, and a 

 young Turbellarian of a light greenish colour by transmitted 

 light were also present. Autolyius prolifer, after an absence 

 of some weeks, again made its appearance this month. 



The midwater-net presented a contrast to tlic foregoing, 

 since larval forms of the Spionida3 only were observed occa- 

 sionally, and once a young example of Nerine \ inch long. 

 On the other hand, Tomopteris | inch in length was obtained 

 several limes, though sparingly. Sayittce also occurred fre- 

 quently in tliis net, but in small numbers, except on the oth. 

 They ranged from 12 to 16 millim. 



Larval Annelids were much more frequent in the surface- 

 nets than in the latter, though they fell far short of the 

 bottom-net in this respect. The majority pertained to the 

 iSi)ionida*, as already explained, and some were obtained in 

 every haul of the net, though larval forms of the Polynoidte 

 cecurrcd occasionally. Totuopteris appeared only once, but 



