3/8 
Dr. Leach’s Arrangement of the Crustacea, (f-c. 
This species may readily be distinguished from all the rest by 
the thickness of its body, by the form of the mucro, which resem- 
bles the corniculus of many of the genus Sirex, and by its colour, 
which after death often changes to a blueish violet, with testaceous 
instead of red lines. 
Spec. 2. Juliis Londinensis. 
J. brunneo-nigricans segmento ultimo submucronato : mucrone 
ano breviore, pedibus rufescentibus articulis pallid is. 
Long. Corp. 2^ unc. 
Habitat in sylvis Londintim prope inter muscos hand infrecpiens. 
Corpus lineolis longitudinalibus teniiissimis rectis exaratum. 
After death it is frequently banded with brassy rings. 
Spec. 3. Julus niger. 
J. segmento ultimo mucronato, pedibus pallidh rufescentibus. 
Long. Corp. If lin. 
Habitat prope Edinburgum sub lapidibus passim ; in Arran Insula 
semel observavi. 
Corpus fortihs lineolaturn, lineolis inaequalibus. 
After death the body assumes a blueish tint 
Spec. 4. Julus terrestris. 
J. cinereo-fuscus annulis diluth brunneis, capite anoque dilu- 
tioribus, ventre pedibusque sublutescente-albis, segmento ul- 
timo mucronato. 
Long. Corp. 1 unc. 
Julus terrestris. Linn,, Fabr., Latr. 
Habitat in Europae sabulosis, sylvis. 
Dorsum striis longitudinalibus rectis exaratum. Pedes articulis 
siibfuscis. 
I con- 
