344- APPKNDIX. 



the empty shell of which was tenanted by a black 

 Pagurus, and a Balanus. A large Cyanea differs 

 from the European C. ciliata, in the form of the 

 stomach. Another Medusa, constituting a new 

 kind of Sthenonia N., was observed ; its digestive 

 organs resemble those of the Aurelia ; and about 

 the edge, eight bunches of very long fibres project, 

 provided, like those of the Physaliee, with two rows 

 of suckers. 



The environs of St. Peter and St. Paul, lying 

 under fifty-three degrees of north latitude, possess 

 an insect Fauna, such as is in Europe only found in 

 sixty and seventy degrees of latitude ; as for instance, 

 in Lapland and Finland. A great number of species 

 are exactly similar in both regions; others of the 

 Kamtschatkan insects have been met with nowhere 

 else, except in Siberia, and a small number is quite 

 peculiar to the former country. All have not yet 

 been subjected to a diligent examination, and only 

 the following can be with certainty mentioned. 



Firstly, in the North of Europe also, are found : 

 Pteruloma Forstroemii Gyllh., Nebria arctica Dej. (hy- 

 perborea Schoenh.}, Elethisa midtipunctata, Pelophila 

 borcaliSj Elaphrus lapponicus and riparius, Notiophilus 

 aquaticus, Loricera pilicornis, P ocellus Icpidus, Dyticus 

 circumcinctus, Staphylinus maxillosus, Buprestis appen- 

 diculata, Elater /lolosericeus, Ptilinus pectinicornis, 

 Necrophorus mortuorum ; Silpha thoracica, lapponica, 

 opnca, anda^rata; Strongylus colon, Byrrhus albo-punc- 

 tatus, dorsalis, Tarius and aeneus ; Hydrophilus scnra- 



