Pedipalpi, Ricinulei, and Opiliones. 43 



Remarks. O. nasuta is distinguished from the female 

 of O. grossa by a number of features, and some among them 

 may be pointed out. The frontal plate overlapping the antennae 

 is much longer and broader than in 0. grossa; the granulation 

 on the upper side of the body is very different, the legs con- 

 siderably shorter in proportion to the body, and the solea of 

 the first tarsus is conspicuously longer in proportion to the 

 length of the whole lower margin of the tarsus. 



A curious feature may be mentioned here. On the two figu- 

 res of the legs (figs. 4 c and i e) are seen some rings (x), viz. 

 femur, tibia and tarsus each with two rings (the distal ring of 

 fourth femur placed on its upper margin), patella and meta- 

 tarsus each with a single ring; each ring signifies a circular 

 area which is well marked off, considerably vaulted and very 

 smooth and shining. Similar areas are also found both above 

 and below on the body; on fig.' i b an area (x) is seen on each 

 coxa, and a pair on most of the abdominal sternites. Similar 

 vaulted, shining areas has also been observed in 0. grossa, but 

 they have not been found in any other genus of the suborder. 

 One is inclined to think that these areas, which as to outer 

 shape and aspect are somewhat similar to small eyes, may 

 be organs of some quite unknown significance. 



Immature Specimen. - - The animal (fig. i f), measuring 

 2.3 mm in length, is proportionately broader than the adults. 

 The body is yellowish brown; the articulating skin between 

 the five posterior abdominal sternites constitutes darker trans- 

 verse bands ; the legs are light yellowish. Fig. i f as compared 

 with fig. i b shows Several differences due to age : lobe of second 

 pair of coxae feebly developed, the surroundings of the future 

 genital aperture very different from the structure in the adult, 

 with broad membrane around the arculi (m) (first abdominal 

 sternite), finally the bands of articulating skin between the 

 abdominal sternites. 



