MARSHALL: ADDITIONS TO "BRITISH CONCHOLOGY." 63 



embryo until some time after they are hatched." 1 But if the head of 

 Chiton is without eyes, it is amply compensated by the immense 

 number contained in its shell, first described by the late Professor 

 Moseley. 2 



Chiton fascicularis var. attenuata Jeffr. — Ilfracombe. 



I have taken the fry and young of the type from sea-weeds during 

 the month of September ; the former are long and very narrow, without 

 any appearance of side tufts — these begin to appear when the animal 

 is about a line in length. 



C. debilis Gray. — Loch Boisdale, 20 — 50 f, plates ; Sound of 

 Sleat, 30 — 80 f., plates (Somerville and J.T.M.) ; Guernsey, off St. 

 Martin's Point, 20 f, a fine living specimen (Burkill) ! Scilly, 40 f., a 

 perfect specimen and some plates (Burkill and J.T.M.); Lynn of 

 Morven, 40 f, plates (Knight) ! Clyde, 18 f. ; Loch Inver, 25 f. 



C. SCabridus Jeffr. — St. Clement's and St. Aubin's Bays, Jersey 

 (Duprey and J.T.M.) ; the north-eastern parts of Guernsey and the 

 south-western parts of Herm ; probably in other parts of the Channel 

 Islands in suitable localities. Also in Torbay, but rare. Professor 

 Gwatkin tells me that the radula differs markedly from that of any 

 other British Chiton. It is figured in Sowerby's Index. 



C. cancellata G. B. Sow. — Low water to 40 f. Scilly (Burkill 

 and J.T.M.); Lismore, 6 f. (Knight)! Falmouth Bay; Milford 

 Haven : Vatersay Sound, Barra, 5 f. The finest come from Guernsey 

 and are f inch in length. The shells are sometimes pure white. 



C. cinereus var. rissoi Jeffr. — Clyde (A.Brown); Sutherland- 

 shire (Baillie) ! Scilly (Burkill and J.T.M.); Herm, between tide- 

 marks ; Guernsey, 20 f. ; Aberdeenshire. Not Payraudeau's species 

 of that name, and not Mediterranean. 



The ringing of the changes on C. cinereus L. and C. marginatus 

 Perm, would suggest a misplacement of tickets or specimens in 

 mounting or remounting the Linnean collection, for as a plain matter 

 of fact C. marginatus is not cinereous, and could not be called so 

 with any consistency ; while on the other hand the term cinereus can- 

 not properly apply to any other Chiton than the cinereous one. 



C. ruber Lowe. — This species has been much confused by some 

 European writers, who have persisted in referring it to C marmoreus 

 Fab, though Mr. Sylvanus Hanley, who says he has traced and 

 examined the Linnean Chitons, has left this theory no foundation. 

 I have specimens an inch in length from the coast of Alaska, where 

 it is one of the most abundant species. 



1 Op. cit., p. 67. 



2 Quart. Journ. Micr. Sci., vol. 25, p. 37-60, pi. 4-6, 1885. 



