106 Richardson Description of a New Species of Spliseroraa. 



PlG. 4. Mandibular 

 appendage. X 10. 



The abdomen is composed of two distinct segments, on the first of 

 which, the post-abdomen, there are two tubercles, one on either side of 

 the median line. Suture lines at the sides of this 

 segment indicate three coalesced segments. The ter 

 minal segment is triangularly shaped and rounded 

 posteriorly with an upcurved margin, which extends 

 all around the terminal half of the segment. The 

 whole surface of the abdomen is thickly tuberculated with low but dis 

 tinct tubercles, each one surmounted with a small tuft of stiff hairs or 

 bristles. On the anterior part four large tubercles are situated in a trans 

 verse line, the two center ones being somewhat closer to each other than to 

 the lateral ones. The uropoda extend beyond the extremity of the abdo 

 men, the outer branch being the longer. Both are pointed and similar 

 in shape. The outer edge of the exopodite is provided with four teeth, 

 while that of the endopodite is smooth. 



The legs of this species are in three series, according to structure, the 

 first three pairs being alike, the fourth and 

 fifth similar, and the sixth and seventh 

 similar. The legs of the first series are long 

 and slender (fig. 5, ), with the second joint 

 or basis nearly cylindrical in shape. The 

 ischium is nearly as long as the basis, and 

 this joint, as well as the merus, is furnished 

 with long straight hairs. The carpus and 

 propodus are likewise long and slender. 

 The legs of the second series, the fourth and 

 fifth pairs, are stout and short, being sim 

 ilar in general form, though differing some 

 what in relative proportions. The basis is 

 about half the length of the entire leg, 

 while the joints following the ischium are 

 very short. In the third series the legs are 

 nearly as long as those of the first series, 

 but differ in size and shape. They are 

 stouter and not cylindrical. 



The whole surface of the body is punctate, 

 and has minute transverse rugre between the 

 points of depression. In color it is a dark 

 brown, shaded on the edges with a lighter 

 brown. 



Type. U. S. Nat. Mus., No. 19857. 



In the Ann. of Nat. Hist.* Spence Bate describes a new species of 

 Sphxroma, tiphxroma vastator, which was procured *' from a piece of wood 

 which had formed part of a railway bridge over one of the backwaters of 

 the West Coast of the Indian Peninsula." The wood is described as 

 being ". honeycombed with cylindrical holes, in many of which the 



FIG. 5. Legs. X 10. 



a. I,eg of ist pair. 



b. " 4 th " 



c. " sth " 



d. " 6th " 



*(3) Vol. XVII, 1866, pp. 28-31, pi. ii, fig. 4. 



