NOTES ON THE FAUNA OF FALMOTTTH. 257 



58°r. ; 18th, 59-9°F.; and on the 24th, GO^F. From that day to 

 the end of the month the surface temperature of the sea 

 remained very uniform, being 60° F. 



Specimens of Tiaropsis multicirrata continued to be very 

 abundant in the harbour ; few, however, were found in the bay. 

 In copepods, Dias longiremus and Oentropages typicus were both 

 very numerous. On the 12th, in the neighbourhood of Coverack 

 and the Lizard, Sagitta bipunctata, Calanus finmarchicus, and 

 Oithonia spinifrons were all abundant on the surface On 

 working the net at a depth of from 25-30 fms. near this place, 

 Oentropages typicus, Evadne, and Podon, were most numerous. 



July. The following changes in the surface temperature of 

 the sea were recorded during this month : — On the 2nd, 60-9 F.; 

 3rd, 59-9 F.; 4th, 60 F.; 5th, 59»F.; 6th, 59°3F.; 8th, 58°3F.; 

 10th, 59°9F.; 12th, 58°F.; 15th, 57°6F.; 17th, 57°3 F.; 20th, 

 60«F.; 23rd, 58°F.; 29th, 57°F.; and 30th, 59°F. 



During August the following changes were noticed : — From 

 the 1st to the 5th, the surface temperature remained at 58°F. 

 On the 6th, 57°F. ; 9th, 566 F.; 12th, 57-6 F. ; 13th, 58-6 F. ; 

 15th, 58°F. ; 16th, 60-3 F. ; 17th, 60 F. ; 18th, 62 F. ; 28th, 

 60-3 F.; and 31st, 61*3 F. 



I have taken these two months together because the weather 

 during most of that time was unsettled with rain, and it was 

 not till the 18th of August that the surface fauna began to show 

 that increase in richness and variety which usually accompanies 

 the commencement of autumn. 



From the 1 st of July to the 1 8th of August, veliger larvse, 

 a few Aetinotrocha, Sagitta bipunctata, and Beroe, were usually 

 to be found in the tow-net. On the 30th, a single female of 

 Oentropages typicus with ova attached was observed. Plutei, 

 and the medusiform stage of Obelia gelatinosa were very 

 numerous both in the bay and harbour during the whole of 

 August. Owing, however, to the wind being off shore during 

 most of the days other forms were scarce. 



September. A very agreeable change took place in the 

 weather during the early part of this month, which lasted till 

 November. There was also a considerable rise in the surface 

 temperature of the sea. On the 2nd, the surface temperature 



