REV. A. M. NORMAN ON THE CRUSTACEA. 187 
would refer those who may be interested in this subject to the 
various and valuable papers by continental naturalists, of which 
translations have from time to time been published in the Annals 
and Magazine of Natural History, namely, that by Steenstrup, 
2 Ser. Vol. xvi. 1855, p. 155; that by Leuckart, 3 Ser. Vol. iv. 
1859, p. 425; those by Lilljeborg, 3 Ser. Vol. vi. 1860, pp. 
162 and 260, and Supplement, 3 Ser. Vol. vii. 1861, p. 47; and 
that by Fritz Miiller, 3 Ser. Vol. x. 1862, p. 44. In our own 
country, Mr. William Thompson was the first naturalist to 
notice these animals. In the Entomological Magazine, Vol. iii. 
1836, p. 452, he described his Sacculint Carcint, together with 
its larva, and assigned to it its right position among the Crus- 
tacea. The only previous author who had ever noticed these 
animals was Cayolini; but although he witnessed the extrusion 
of the young, he thought that the sac, whence they issued, and 
which he well describes as similar in form to the seed vessel of 
Capsella bursa-pastoris, was not a perfect animal, but the ovisac 
of a large Crustacean. Professor Bell notices in his History of 
British Stalk-Eyed Crustacea, p. 108, certain parasites which he 
found attached to the abdomen of Carcinus menas and Portunus 
marmoreus, Which his characteristic description clearly identifies 
with Sacculina. Lastly, Dr. Anderson has published in the 
Annals of Natural History for January, 1862, a paper on Sac- 
culina, in which he records the occurrence of Sacculina Carcini 
and Peltogaster Paguri in the Firth of Forth, and describes what 
he considers to be a new species of the former genus, under the 
name of Sacculina triangularis. 
It will be observed that Sacculina Carcint and Peltogaster 
Paguri, two out of the three species of Sacculinacea which have 
hitherto been noticed in Great Britain, were obtained during the 
recent expedition, and that Peltogaster sulcatus and Clistosaccus 
Paguri, which had up to the present time only been found by 
Lilljeborg on the Norway coast, were added to our fauna. Full 
descriptions and figures of these species are given in those 
papers by Lilljeborg in the Annals of Natural History to which 
allusion has already been made. 
