THE MOLLUSCA OF THE ISLE OF MAN. 379 
therefore, the two works have been carefully compared, and the 
results are given with a near approach to, if not with absolute, 
accuracy. I have deemed it well to give an abstract of the two 
works, so far as they relate to the Mollusca of our island, in 
parallel columns, devoting two columns to each. As the classi- 
fication and nomenclature employed in the ‘ British Mollusca’ 
differ in many points from those of the ‘ Malacologia Monensis,’ 
and have been much followed by later writers, I have followed 
them as to the orders, families, genera, and species in this list, 
those adopted in the earlier work being consequently departed 
from. For convenience of reference, however, I have added the 
volume and pages of both works where every species in the list is 
mentioned. 
Several additions to the list of Mollusca have been made since 
Professor Forbes’s time. Mr. Robert Garner, in a paper on 
** Professor Edward Forbes and his Country,” printed in the 
‘Midland Naturalist’ for March and April, 1878, has given, I 
think, nineteen species as the result of his dredging and other 
excursions in and about our island. I have inserted these in the 
list in due order with Mr. Garner’s name and his remarks on 
habitats, &c. Little else is added. 
It may be well to call attention to a few of the species claimed 
for us by Forbes. And first of those of which he says that 
merely the shell or only a single valve was found. (1) Of the 
Pholas cristata we read in the ‘ British Mollusca,’ ‘‘ Dead valves 
are frequently cast ashore on the Isle of Man,” and, in the 
‘ Malacologia Monensis,’ ‘‘ Valves are occasionally thrown ashore 
at Douglas.” (2) The Solecurtus candidus of the ‘ British 
Mollusca’ apparently takes the place of the Solen strigilatus of 
the ‘ Malacologia Monensis,’ and in the latter work we are told, 
“A single valve of the form b,” i.e., candida, ‘“‘ came up in the 
dredge off the coast of Ballaugh, Sept., 1836.” (3) Respecting 
the Lutraria elliptica we read, in the ‘ Malacologia Monensis,’ 
“ Ballaugh (dead valves), Aug., 1837. Port Erin, Mr. Wallace.” 
In the ‘ British Mollusca’ the Isle of Man is given as a locality 
for this species without further remark. (4) Of the Cardiwm 
aculeatwm, the ‘ Malacologia Monensis’ informs us, “ Dead valves 
sometimes cast on shore at the Point of Ayr, but I have never 
taken it alive on the Manx coast.” And, inthe‘ British Mollusca,’ 
we read of this species, “It is a remarkably local shell, and we 
