and curious Forms of Arach/rida. 385 



dusky red-brown spots, one a little way behind each of the 

 basal joints of the second pair of legs. The genital aperture has 

 a somewhat corneous appearance ; it is of an oval form, con- 

 vexly prominent, and divided longitudinally by a gaping inci- 

 sion ; not far behind it is the anal orifice, which is of the same 

 form and character externally as the genital aperture, though 

 not a fourth of its size. 



The eyes (seated as above described) are very distinctly 

 visible : those of the foremost pair (forming the apex of the 

 triangle in which the three pairs are placed) are of a triangular 

 shape, closely contiguous to each other, and smallest of the 

 six ; those of each lateral pair are also contiguous, on a di- 

 stinct tubercle, the posterior eye of each being the largest of 

 the six ; they are of a pale dull amber-colour, and margined 

 with red-brown. 



The legs are furnished with short hairs ; the basal joints are 

 the strongest ; the next are very short, and turned on the 

 outer side : the tarsi, metatarsi, and femora of each pair are 

 of very nearly equal length ; the tarsi of the first pair are 

 rather dilated towards their fore extremities, and are (like 

 those of the other three pairs) cleft at the fore extremities on 

 the upperside, two apparently simple terminal curved claws 

 springing from the cleft. 



The palpi are very minute, and, with the other parts of the 

 mouth, placed at the bottom of a deep circular pit or cavity at 

 the extreme fore end of the body ; being thus minute, and 

 sunken below the surface, as well as covered with the hairs 

 fringing the cavity, their form and structure could not be 

 ascertained with the magnifying-powers at my disposal. 



Two examples (both females) of this remarkable Acarid 

 were received, among numerous spiders, from Mr. James 

 Hardy, of Old Cambus, Berwickshire, by whom they were 

 found (probably among moss) on Cheviot Hill. It is unlike 

 any thing I have ever seen before ; and Dr. L. Koch agrees 

 with me in the opinion that it is new to science. The 

 curious position of the parts of the mouth, with the eyes and 

 other characters, necessitates the formation of a new genus for 

 its reception. It is with much pleasure that I connect the 

 name of Mr. Hardy with this interesting addition to the known 

 species of our indigenous Acaridea. 



Order Phalangidea. 

 Fam. nov. Crotonoides. 



General appearance somewhat Acarideous, the caput, 

 thorax, and abdomen being so united as to make their junc- 



