172 



FAUNISTIC NOTES. 



the course of a month. I have given these rarer forms to show that 

 they do occur in September, and they may be of use to other naturalists 

 on fauuistic work. 



The following list is drawn up to show more clearly the variation 

 in the fauna for the two years : 



1893. 1895. 



abundant . . absent. 



Nodiluca . 

 Liriantha . 

 Chcctopteriis 

 Dijnirena . 

 Amphincma 

 Lar {Willia) 

 Magelona . 

 Doliolum . 

 Pilidium . 

 Tornaria . 

 Lizzia 



Actinotrocha 

 Thalia 

 Bipinnaria 

 Mitraria 

 Amphioxus . 

 Beroe 

 Solmaris 

 OctorcMs 

 Dipurena (sp. ?) 

 EucMlota . 



few daily 



one 



fairly abundant 



abundant 



few 

 absent 



all show a great 

 decrease. 



very abundant, 

 fairly abundant. 



few. 



» 

 three, 

 two. 

 one. 



•all new to Plymouth. 



From this list it is easily seen that more interesting animals were 

 taken during September, 1895, than in 1893. The cause is difficult 

 to account for ; it may, perhaps, be due to the weather, which was 

 exceptionally fine during September, 1895. There was scarcely any 

 rain, but plenty of sea mists and fogs ; the last week of the month was 

 exceptionally hot. The sea was usually calm ; in fact, September was 

 an ideal month for marine work. 



The weather during the summer months was very changeable. Mr. 

 Allen informs me that May and June were fine, July was stormy and 

 wet. There was a spell of fine weather at the end of July, and during 

 the first few days of August, then unsettled weather until middle of the 

 month, when the fine weather commenced, which lasted till the end 

 of September. 



Garstang (1894) gives a general account of the weather for 1893, 

 which may be of interest to quote for comparison : — 



