394 PERCY SLADEN TRUST EXPEDITION 



distinguished from them are the position of the eyes, which are situated very near to the 

 lateral margins of the scutum, the shape and proportions of the segments of the palp 

 (especially the shape of the patella) and the coloration of the legs. 



PSEUDOSCOPJTONES. 



1. Feaella affinis, n. sp. (Fig. 11). 



Colour reddish brown, the legs and the fingers of the palp paler in colour than the 

 rest of the animal. 



Cephalothorax much longer than broad. Prominences of the anterior part the same 

 in number as those of F. mucronata, Tullgr., and very similar to them in appearance, but 

 the lateral ones of the anterior row are much broader 

 than the central ones (Fig. 11). A pair of small lateral 

 tubercles are present as in F. mirabilis, Ell., and F. mu- 

 cronata. Two transverse depressions or furrows are 

 present ; the anterior one, which is situated immediately 

 behind the second row of prominences, is shallow and 

 recurved ; the posterior one is rather deep and well 

 marked, and is separated from the anterior furrow by 

 a somewhat elevated area. A slight furrow also occurs 

 between the' two rows of prominences. Very similar Jj^ ^tet^ow of" P 2 

 grooves are present hi F. mucronata, but they have not nences of the cephalothorax is also 

 been described. Eyes (of each pair) separated from one 

 another by a space which is a little less than the diameter of an eye. 



Abdomen resembling closely that of F. mucronata ; it is as broad as long, and the 

 sculpturing of the tergites is reticulate. 



Palp very similar in structure to that of F. mucronata, but the spine on the anterior 

 edge of the trochanter is shorter, as compared with the width of the segment, than is the 

 case in that species, and there is only a very slight prominence on the anterior side of the 

 base of the femur. Length of hand (including immovable finger) equal to or a little longer 

 than that of the femur (Fig. 11). 



Legs. Trochantin of first leg about equal to the femur in length ; tibia shorter than 

 the femur ; tarsus very long and considerably exceeding the other segments of the limb in 

 length. Trochantin of fourth leg about half the length of the femur ; the latter a little 

 shorter than the tibia or tarsus. A gap is present between the coxae of the first two legs, 

 much as in F. mucronata. 



Measurements in mm. Length of cephalothorax - 55 (in the largest example "64), of 

 abdomen 1*06, of femur of palp "4, greatest breadth of femur of palp "28, length of tibia 

 •37, of hand (including immovable finger) "46. 



Material. Seven specimens from Silhouette and Praslin. 



Remarks. The genus Feaella was instituted by Mr Ellingsen in 1906, for a highly 

 peculiar species of Pseudoscorpion (F. mirabilis, Ell.) collected by the late Sig. Fea in 



