H. WOODWARD ON FOSSIL CRUSTACEA. 549 
42. Conrrisutions to the Knowledge of Fosstz Crustacka. By Henry 
Woopwarp, Esq., LL.D., F.R.S., F.G.8., of the British Museum. 
(Read May 28, 1879.) 
[Puatr XXVI.] 
I. On a fossil Squilla from the London Clay of Highgate—part of the 
“* Wetherell Collection” in the British Museum. (Plate XXVI. 
fies) 
The Stomapoda (as restricted by Prof. Huxley, and) represented 
at the present day by Squwilla, Pseudosquilla, Gonodactylus, and 
Coronis, are not only interesting from the fact that they differ 
widely in many important points of structure from all other Crus- 
tacea; but, from their extensive distribution over the seas of the 
globe, they bear evidence of high antiquity, and justly challenge the 
attention of the paleontologist. 
Two causes, however, may probably assist in explaining the rare 
occurrence of Squilla in a fossil state :—first, the thinness of its 
test, which would render it less likely to be preserved ; and, secondly, 
the fact that Squilla lives in, comparatively speaking, deep water, 
and prefers clear water undisturbed by sedimentary deposits. 
Fossil Squille have been described by Minster, in 1839, from the 
lithographic stone of Solenhofen, Bavaria, under the name of Sculda 
pennata (Beitrage, vol. ii. t. 4. fig. 4), and by the same author from 
the Eocene of Monte Bolca, near Verona, Italy, under the name of 
Squilla antiqua (Beitrage, vol. v. t. 9. f. 11). 
The British Museum possesses very perfect specimens of Squzlla 
from the lithographic stone of Solenhofen (part of the late Dr. 
Hiberlein’s collection, see Plate XXVI. fig. 5); but I have not 
seen the fossil Squilla from Monte Bolca, and, although the figure 
given by Minster is sufficient to pzove it to be a veritable Squilla, 
it is of no yalue for the purpose of critical comparison. 
The specimen about to be described, although merely a portion of 
an abdomen, is so characteristic of the genus Squilla that it deserves 
to be recorded in our list of British fossil Crustacea. 
To Prof. Wood-Mason is due to the credit of noticing the generic 
characters of this fossil, in a hasty survey of the “ Wetherell Collec- 
tion” some time since: it may appropriately be noticed now together 
with other fossil Squille of still older date. 
The fossil, which is preserved (as is usual with organic remains in 
the London Clay) in a phosphatic nodule of unequal hardness, has 
only in part been developed with success, and exhibits five well- 
preserved segments (xrtv—xvim1), a portion of the carapace, traces of 
the thoracic appendages, and those of the xxth segment preceding the 
telson. 
It presents the same glossy-black enamelled surface character- 
istic of Macruran-Decapod remains from the London Clay. 
