HERMAPHRODITE. 205 



had become internally filled up with the usual, brown, 

 transparent, laminated cement, cone within cone, so that 

 this lower part was rendered rigid and stick -like ; this, 

 latter effect, I apprehend, is the object gained by the forma- 

 tion of cement within the peduncle, of which I have not 

 observed any other instance. The entire length of the 

 largest specimen was one inch ; some other specimens were 

 only half this size. 



The thorax and prosoma are of the same shape as in 

 I. Cumingii, and in the largest specimen, about one tenth 

 of an inch square ; the prosoma, as in that species, is hairy. 

 In the Mouth, all the parts are closely similar to those of 

 /. Cumingii, but one third larger ; the crest of the labrum 

 is a little roughened with minute points : the palpi are 

 squarer and blunter at their extremities : the mandibles 

 have their second and third teeth nearly equal in size to 

 the first, and they do not appear pectinated : the maxillae 

 have their spinose edge very nearly straight : the outer 

 maxillae are pointed. The olfactory orifices are similarly 

 situated, and of similar shape ; they are dark coloured. 



Cirri. — These also are similar to those of I. Cumingii; 

 the segments, however, of the three posterior cirri have 

 each four pair of spines, placed very close together in a 

 transverse direction. First cirrus has its two rami un- 

 equal in length by about six segments. The anterior 

 rami of the second and third cirri are thicker, and more 

 thickly clothed with spines, than the posterior rami, to 

 perhaps a greater degree than in I. Cumingii. In the 

 posterior cirri, the upper segments of the pedicels are 

 nearly as long as the lower segments. 



Caudal Appendages, four times as long as the pedicel 

 of the sixth cirrus, and three fourths of the length of the 

 rami of this same cirrus : segments thirty-two in number, 

 and therefore as many as those forming the sixth cirrus : 

 the upper segments are much thinner and longer than 

 the basal segments ; each furnished with a circle of short 

 bristles ; whole appendage excessively thin and tapering : 

 the two closely approximate. 



