MARINE ZOOLOGY 



8. Nasia reticulata (Linn.). 



I have found this in the Colne and I think 

 elsewhere, but it is not abundant. 



IV. GASTROPODA OPISTHO- 

 BRANCHIA 



1. Acer a tullata, M tiller. 



This must be common in the upper part 

 of the Stour, and I think I have collected it 

 in the Colne. 



2. Philine aperta (Linn.). 



Common off Mersea and met with in most 

 other places. 



Nudibranchiata 



1. Galvina cingu/ata t var. vittata (?) 

 Specimens dredged off the Gunflcet bank 



in 1895, but not preserved or identified, were 

 as far as I can remember more like E. vittata 

 than any other figured by Alder and Han- 

 cock. 



2. Facelina coronata, Forbes and Goodsir. 

 Some years ago this was not uncommon at 



a depth of a few fathoms off Mersea but 

 always of small size, and lately has been rare. 

 In 1889 good specimens were common in the 

 creek east of Walton-on-Naze. Specimens 

 carefully dried on glass, and well soaked with 

 gum arabic to protect them from the solvent 

 action of the Canada balsam in which they 

 were afterwards mounted, have kept their 

 colour well for ten years, and are in every 

 way satisfactory. 



3. Fiona marina (Forskal). 



Many years ago I dredged in Harwich 

 harbour a Nudibranch which I did not 

 again find until 1901, when I obtained two 

 in the Orwell, a short distance outside Essex. 

 They seem to differ from the figures in Alder 

 and Hancock's Ray Society's monograph only 



in being smaller, which is not surprising, 

 since the two which they had found were 

 obtained off Falmouth. 



4. Acantkodoris pilota (Mailer). 



This is common amongst the Fuci on the 

 banks of the Crouch at Burnham, and is also 

 dredged off Mersea. By proper management 

 both the form and colour may be well pre- 

 served in undiluted glycerine. 



5. Goniodoris castanea, Aid. & Han. 



I obtained in the Orwell a specimen of 

 this which corresponds with the figure of the 

 only specimen which Alder and Hancock had 

 found, and is quite unlike any other. 



///. Cephalopoda 



1. Sepia offtcinafisy Linn. 



In 1899 I caught a number of small speci- 

 mens off Mersea, but had never seen one 

 before. They are rather too young for 

 accurate determination, but probably belong to 

 this species. 



2. Sepio/a at/antica, D'Orb. 



Eleven years ago this was very abundant 

 in the creek east of Walton-on-Naze, and 

 not uncommon at all other stations, but 

 latterly has become more and more rare. 



3. Loligo media (Linn.). 



Some years ago this was fairly common in 

 the Stour near Harwich, but latterly it has 

 become more and more rare. This has been 

 kindly identified for me by Mr. W. E. Hoyle. 



At my request Mr. Wm. Cole has very 

 kindly supplied me with the following list of 

 the marine testaceous mollusca of the Essex 

 coast, which have come under his notice in 

 connection with the Essex Field Club and 

 the museum at West Ham. It will show 

 the species which occur outside the district 

 which I have more especially studied. 



