captured in Rio Janeiro. 439 



the lip, which is semicircular, but pointed at the apex ; and the 

 sternum is heart-shaped. These parts have a pale dull yellow- 

 hue, and the cephalothorax, which is rather the darkest, has a 

 black line extending from the medial indentation towards the 

 intermediate eyes, which gradually diminishes in breadth to its 

 anterior extremity. The eyes are seated on black spots on the 

 anterior part of the cephalothorax ; the four intermediate ones 

 are placed on a prominence and nearly form a square, the two 

 posterior ones, which are the largest of the eight, being rather 

 wider apart than the two anterior ones ; the eyes of each lateral 

 pair are the smallest ; they are seated on a minute tubercle, and 

 are almost in contact. The legs are slender, provided with hairs 

 and spines, and are of a brownish-yellow colour, the extremity 

 of the joints being much the darkest ; the first pair is the longest, 

 the second pair slightly surpasses the fourth, and the third pair 

 is the shortest ; each tarsus is terminated by the usual number 

 of claws of the customary structure. The palpi are short, and 

 of a pale yellow colour, with the exception of the digital joint, 

 which has a yellowish-brown hue ; the radial is stronger than 

 the cubital joint ; a long bristle projects forwards from the ex- 

 tremity of the latter, and the former is prominent on the outer 

 side; the digital joint is oval, with an obtuse, glossy process at 

 its base, curved outwards; it is convex and hairy externally, 

 concave within, comprising the palpal organs, which are highly 

 developed, prominent, complicated in structure, with several 

 projecting processes, and a prominent spine, originating near 

 the middle of the inner side, which curves across towards the 

 outer side, and then passes downwards towards the extremity ; 

 they are of a yellowish-brown colour, intermixed with dark reddish- 

 brown. The convex sides of the digital joints are directed to- 

 wards each other. The abdomen is subcylindrical, somewhat 

 convex underneath, and sparingly clothed with hairs ; from the 

 middle of the anterior extremity of the upper part a small acute 

 corneous spine is directed obliquely upwards and forwards, and 

 the posterior extremity, which is slightly elevated, projects be- 

 yond the spinners ; it is of a dull yellow colour, with three narrow 

 white bands extending from the anterior to the posterior extre- 

 mity of the upper part, a small cruciform black spot occurring 

 on the latter; the medial band is fusiform, and comprises a 

 longitudinal line of a dull yellow hue; the colour of the spinners 

 is dark brown, and that of the branchial opercula yellowish- 

 brown. 



[To be continued.] 



