378 Dr. Leacn’s Arrang cement of the Crustacea, $c. 
This species may readily be distinguished from all the rest by 
the thickness of its body, by the form of the mucro, which resem- 
bles the corniculus of many of the genus Sirez, and by its colour, 
which after death often changes to a blueish viclet, with testaceous 
instead of red lines. 
Spec. 2. Julus Londinensis. 
J}. brunneo-nigricans segmento ultimo submucronato: mucrone 
ano breviore, pedibus rufescentibus articulis pallidis. 
Long. Corp. 2i unc. 
Habitat in sylvis Londinum prope inter muscos haud infrequens. 
Corpus lineolis longitudinalibus tenuissimis rectis exaratum. 
After death it is frequently banded with brassy rings. 
Spec. 8. Julus niger. 
J. segmento ultimo mucronato, pedibus pallidé rufescentibus. 
Long. Corp. 1$ lin. 
Habitat prope Edinburgum sub lapidibus passim ; in Arran Insulá 
semel observavi. | 
Corpus fortiüs lineolatum, lineolis inzequalibus. 
After death the body assumes a blueish tint. 
Spec. 4. Julus terrestris. 
J. cinereo-fuscus annulis diluté brunncis, capite anoque dilu- 
tioribus, ventre pedibusque sublutescente-albis, segmento ul- 
timo mucronato. 
Long. Corp. 1 unc. 
Julus terrestris. Linn., Fabr., Latr. 
Habitat in Europe sabulosis, sylvis. 
Dorsum striis longitudinalibus rectis exaratum. Pedes articulis 
subfuscis. 
I con- 
