PATELLA. 429 
Watella wotata. 
A marked example of this shell is still preserved in the 
Linnean collection. It proves to be (as was surmised, despite 
the incorrectness of the stated locality, and the entire absence 
of any illustrative synonym) the Emarginula notata of Reeve’s 
‘Conchologia Systematica,’ pl. 140, f. 3. 
Patella cructata. 
The type of this species must be sought for in the Royal 
Museum, not in the cabinet of our author, who did not possess 
an example himself, but from the first referred us to the 
‘Museum Ulrice’ for a more detailed account of its characters. 
Schroter, by the aid of that publication, has essayed, and 
I think successfully, to identify it with the limpet delineated 
by him, under that name, in his ‘ Kinleitung in die Conchylien- 
kentniss’ (i. p. 432, pl. 5, f. 6). His engraving very fairly 
represents a scarce Acmea, which, not having been described 
at large in any subsequent work (it totally escaped the notice 
of Lamarck), and the original account being in German, a 
language rarely intelligible to our English conchologists, I 
have thought desirable to redescribe from specimens in my 
own collection. 
AcMA cructaTa, Lin.—Shell oval, moderately solid, varying 
in elevation from subdepressed to subconical, usually found 
smooth, but rayed in fresh and perfect individuals with very 
fine raised striae. Colouring rather variable, yet almost always 
exhibiting a more or less cruciform arrangement; when most 
characteristic, displaying four broad white rays upon a white 
speckled ground of blackish brown that are usually bisected, as 
they spread, by a short dark streak which at times becomes 
so broad as to produce the appearance of there being eight 
narrow white rays, or of a cross with white edges and a brown 
centre: occasionally, too, there are narrower interstitial rays 
besides. Apex blunt, yet prominent, always white both within 
and without, placed at rather more than one-third the space 
