390 THE ZOOLOGIST. 
a very fine specimen of Limaz maximus var. Ferussaci — ANTHoNnY BELT 
(Ealing). 
_ [We do not find these varieties noticed in Gwyn Jeffreys’ well-known 
Text-book. Arion ater var. bicolor is described by Moquin Tandon (Hist. 
Nat. des Mollusques, ii., p. 11) as of a dull brown colour, yellowish or 
orange at the sides; and two coloured figures of a young specimen, one 
elongated, the other contracted, are given on Plate i. of the Atlas to 
Ferussac’s grand work, ‘ Hist. Nat. Gen. et Part. des Mollusques Terrestres 
et Fluviatiles.’ Limax maxima var. Ferussaci is described by Moquin 
Tandon (tom. cit., p. 29) as of a whitish hue, the mantle covered with round 
black specks and four rows of larger spots of the same colour. A segment is 
figured (Plate iv, fig. 5) for comparison with segments of other varieties 
placed side by side on the same plate, from which it appears that var. 
Ferussaci resembles most nearly var. cellurius. It may be well perhaps to 
point out that the slugs of the genus Arion differ from the Limacide or 
common slugs in having the respiratory orifice placed in front instead of 
near the hinder part of the shield, in having a slime-gland at the tail, and 
also in the arrangement of the teeth.— Ep. ] 
CRUSTACEA. 
Pisa tetraodon at Penzance.—I have to record the capture in my own 
nets of a specimen of the very rare Crab (off our shorés), the Four-horned 
Spider Crab, Pisa tetraodon. Its correspondence with Bell’s description is 
perfect. My specimen is a female, in fully berry, which will make its 
preservation somewhat difficult, but my friend Mr. E. Maynard means to 
attempt it. Bell remarks of this Crab that it frequently occurs in large 
numbers in given localities, and I have trustworthy information that a Crab 
of this description (said by the local fishermen to be seen nowhere else) 
occurs off Port Isaac, on the north coast of Cornwall. I obtained a specimen 
of this Port Isaac Crab some weeks ago, and put it down as Pisa 
Gibbsii ; but, looking at my present capture, I think the Port Isaac Crab 
is more probably Pisa tetraodon.—THos. Cornisu (Penzance). 
NOTICES OF NEW BOOKS. 
The Great Auk or Garefowl: its History, Archeology, and Remains. 
By Symrncton Grieve. 4to. London: T.C. Jack. 1885. 
As there can be no doubt that the Great Auk, or Garefowl, is 
now to be numbered amongst birds which are extinct, no living 
example having been met with for more than forty years, the 
time seems to have arrived for publishing as complete a history 
as can be compiled of this very remarkable species. Such a 
