NOTES ON THE FAUNA OF FALMOUTH. 267 



secured: — Oithonia spinifrons were exceptionally numerous, 

 many of the females being laden with ova. Two Tornaria larvse, 

 and two very advanced specimens of Actinotrocha, and several 

 small Saphenia mirabilis were also noticed. Appendicularia, 

 Sagitta bipunctata, and Corycceus anglicus seemed very equally 

 distributed, while Ehizosolenia occurred only on the surface. 



No other forms of interest were secured in the tow-not 

 during the remainder of the month. 



Fauna Notes. 



The attractive gonozooid of Cladonema radiatum was first 

 observed on the 28th of May swimming on the calm surface of 

 the sea in the tidal docks. During that morning upwards of six 

 specimens of that species were secured in a tin cup. These 

 lived in a jar of sea-water in my hut for some time, but 

 gradually died as on previous occasions without undergoing any 

 further developmental changes. I have noticed this year that 

 all my specimens of this gonozooid agree in structure with those 

 found byM. Dujardin, viz. : they invariably possess eight arms 

 on the umbella, and the manubrium is furnished with only five 

 lobes ; whereas the specimens described by Mr. Holdsworth in 

 the Eev. Hinck's monograph,^ possess ten arms and seven lobes. 

 These last named specimens were procured from the tanks in the 

 Zoological Gardens, whereas both my specimens, and those 

 secured by the French investigator, were found in the sea. 

 This slight increase in the number of arms and lobes round the 

 mouth was probably due to the conditions under which they 

 were reared ; and in my opinion must not be looked upon as a 

 specific distinction. 



Nemertea. On the 2nd of March, at extreme low-water 

 mark, a single specimen of Micusa fusca. (M'Intosh) was found 

 under a stone amid a mass of decaying Zostera. When at rest 

 in a glass pan, the specimen measured about 95 m.m. in length, 

 but this measurement could easily be doubled without any 

 apparent effort. The caudal extremity invariably measured 6 

 m.m. in length. Like many other animals of the same class, 

 this species is able to live in a jar of sea- water for a considerable 

 time without any attention, and. during the many months I had 

 it in my possession, no change other than a slight decrease in 

 length was observed. 



