39 76 Proceedings of the Royal Irish Academy. 



breadth springs from its base and extends well beyond the apex of the 

 segment, fixed chela armed with two teeth. 



Distribution. — Germany (under fallen leaves, Kramer). 



Seiulus minutus sp. nov. (PL VIII, fig. 31.) 



The following is a short description of a Seiulus found amongst sphagnum 

 moss from Croaghmore Mountain, Clare Island, during the month of August. 

 It is apparently an undescribed species, remarkable for its small size and 

 peculiar shape, and the distinct puncturation which greatly resembles that 

 of one of the Oribatidae, Nothrus monodadylus, also found in sphagnum. 

 Owing to the small size and delicate sti-ucture of the single specimen it did 

 not seem advisable to risk the dissection of the month parts, so that the 

 structure of the jaws and the epistome are not included in the description. 



Female. —The length is about 286/i, breadth 165^. Colour faint yellow, 

 translucent. The body is rounded in front, side margins sub-parallel, end 

 margin truncated. Dorsum with distinct light-refracting punctures, and 

 irregularly shaped markings towards the front and sides ; there are two 

 double rows of short hairs on the back, and a somewhat stronger marginal 

 row springing from rather widely separated serrations on the sides of the 

 body. 



Sternum and genital plate of the usual laelaptid shape, the latter is long 

 and narrow ; anal plate of moderate size, broadly trapezoidal, lying close to 

 the end of the body with about eight pairs of neighbouring hairs which are 

 stronger than those of the upper surface. Peritreme well developed, 

 stigmal expansion large, extremity partly enclosing the last pair of coxae, 

 strengthened on its outer side by a narrow ehitinous plate. 



Capitulum large and cup-shaped, maxillary plate with three pairs of hairs, 

 one pair placed close to the small maxillary lobes. Palps comparatively 

 large, armature normal. Legs, especially the last three pairs, very robust, 

 with strong hairs ; upper lobe of the ambulacra hood-like, with uninterrupted 

 margin, immediately over the small ambulacra of the first pair of legs is a 

 long hair with a distinctly lanceolate extremity. 



Seiulus levis Oudms. et Voigts. (PL VI, fig. 21). 



Lough Fenagh and Delphi, $ ? in moss, September ; Croaghpatriek, ? 

 amongst sphagnum, October. 



A preliminary description of this species appeared in the " Zoologischer 

 Anzeiger" for 1901, and a fuller account with figures appeared in a later 

 paper (75, p. 232). S. levis is remarkable for its oval shape, comparatively 



