490 



Cephalo-thorax small, with, a strong notch or depression, on the 

 upper side at the junction of the caput and thorax, very con- 

 spicuous when looked at in profile ; colour, orange-yellow. Legs 

 similar in colour, moderate in length and strength, and furnished 

 with numerous long fine hairs. Abdomen large, glossy, and 

 dull black. 



Found under a stone near Llanrwst, North "Wales, in the 

 month of April, 1860; and since then received from near Paris. 



NERIENE MYSTICA. 



Neeeene mtstica, Cambr, Ann. and Mag., Nat. Hist. 1879, vol. 

 iv., ser. 5, p. 201, pi. xii., fig. 5. 



Adult female, length 1 line. 



The cephalo-thorax is of an elongate-oval form, somewhat 

 drawn out at the fore-extremity ; the clypeus projects, and is 

 equal in height to half that of the facial space. It is of a dull 

 greenish yellow-brown colour ; the margins and some vein-like 

 converging lines blackish, and the fore part suffused slightly 

 with a sooty hue. The hinder slope has a very large deepish 

 extended indentation, giving it a hollow appearance in profile, 

 with a prominence at the thoracic junction, and a correspond- 

 ingly deep depression directly behind the occiput, which is a 

 very little gibbous ; the ocular area slopes forwards, and the 

 clypeus projects in a slightly upturned form ; the whole profile 

 line is thus characteristically, but unusually irregular. Behind 

 each lateral pair of eyes is a slight, longitudinal, indentation 

 running backwards. The ocular area is of a broadish transverse 

 oval shape, and the eyes are rather closely grouped together, 

 those of the hind-central pair, which are the largest, are further 

 from each other than each is from the lateral on its side, the 

 interval being about equal to an eye's diameter. The interval 

 between the fore-contrals is very small, and each is contiguous 

 to the fore-lateral next to it ; the lateral pairs are placed very 

 slightly obliquely. The legs are slender, rather short, of a palo 



