BY WILLIAM A. IIASWELL, M.A., B.SC. 1029 



of appendages have each short basal joints, each of which lias two 

 short lateral processes near its distal end ; the second joint is a little 

 longer than the first, the third ecpial to the first ; the fourth is 

 longer than the three first together ; the fifth is somewhat longer 

 than the fourth, the sixth about the same length as the fourth, 

 but more slender, the seventh about half the length of the sixth ; 

 the eighth, the joint between which and the seventh is scarcely 

 discernable, is equal in length to the seventh ; the claw is longer 

 than the eighth segment, tapering distally, and resembles an 

 additional segment. 



This species occurs in Port Jackson. 



Genus. COLOSSENDEIS. Jarzynsky. 



CoLOSSEXDEIS TENUISSIMA. n. Sp. 



[Plate LVL, figs. 5-8.] 

 The body of this remarkable species is of extremely slender form 

 exceeding in that respect any of the described species of Pantopoda. 

 The first joint is comparatively short, and its lateral processes 

 approach close to the bases of the preceding appendages. The 

 second segment is extremely long, the length being about six times 

 the breadth, and the lateral process for its pair of appendages which 

 are placed close to the posterior end of the segment, being separated 

 by a very wide interval from those of the preceding pair. The 

 third segment is about equal in length to the second ; the fourth is 

 about half the length of the third. The lateral processes are all 

 very short, and somewhat constricted where they join the segment. 

 The abdomen has been lost. The proboscis is very remarkable ; 

 with its peduncle it is nearly as long as the body, of a pyriform 

 shape armed towards its middle with a prominent tooth and 

 supported on a very long and slender peduncle. The second pair 

 of appendages are very long and slender passing far beyond the 

 extremity of the proboscis ; the first joint is indistinct ; the second 

 is short and stout ; the third is slender and of great length, longer 

 than the peduncle of the proboscis ; the fourth joint is veiy short ; 

 the fifth is about half the length of the third and equally slender ; 



