244 BULLETIN OF THE 



conical elevation. The ocelli are very rudimentary, or entirely wanting. The 

 rostrum is almost as long as the body and abdomen together. It is somewhat 

 cylindrical, more or less swollen a little behind the middle, and also toward the 

 tip. In one specimen the rostrum is almost clavate. 



The palpi extend considerably beyond the rostrum ; their joints have, in a 

 general way, the same proportions as in the species described below, but the 

 eighth (counting ten joints in the palpi) is very short, even globose. 



Accessory legs much as in the other species. The terminal claw, though 

 small, is distinct from and movable upon the preceding. The spines of the 

 outer joints are of peculiar and characteristic form (Fig. 13), being flattened, 

 obliquely truncate, broadest at base and tip, and narrower in the middle. 

 They are arranged in several irregular rows along the lower (i. e. concave) sides 

 of the 7th to lUth joints. They are longest iu the inner rows; in the outer rows 

 they become much shorter, and finally quite disappear ; those of the outer rows 

 are not truncate at the tip, but evenly rounded, and of a broadly spatulate form. 

 Legs long and slender, four times as long as the body (including rostrum and 

 abdomen). Fourth joint longest ; tarsus and propodus (7th and 8th) nearly 

 equal, former a little longer ; both are simple and unarmed. Dactylus (Fig. 8) 

 excessively long and slender, — more so than in any other Pycnogonid known to 

 me ; it is much longer than the propodus. Color varying from straw-yellow 

 to nearly white. 



Length of body (including rostrum and abdomen) 17 mm. 



Rostrum 8.5 " 



Palpi 11 " 



Accessory legs 27 " 



Ambulatory legs 67 " 



Extent 138 " 



Colossendeis colossea, sp. nov. 



Plates I. and III. 



Body very short and stout, unsegmented ; three anterior pairs of lateral 

 processes separated by very small intervals, last pair usually separated from 

 the next anterior by a somewhat greater interval. The processes are very short 

 and swollen; their length scarcely equals the width of the body; they are con- 

 stricted at the base, and separated from the body by a suture. Abdomen very 

 small, less than one fourth the body (exclusive of rostrum), of slender pyriform 

 shape, obtusely conical towards extremity. 



The rostnim is of great size, its length being about one and a half times that 

 of the body, and of peculiar and characteristic form. At the base it is of 

 slightly less diameter than that of the body (2.5 mm.) and continues of the 

 same size for about one third its length ; it then suddenly expands to a diame- 

 ter of nearly 5 mm. and then gradually tapers toward the tip; the terminal 

 portion is cylindrical and about 3.5 mm. in diameter. The rostrum is articu- 

 lated to the body, upon which it is somewhat movable. Mouth large, shai-ply 

 triangular. 



