14 



W. LlLLJEBORG, 



is sharp and cutting, it is probable that it serves to divide the food, which 

 is afterwards ground by the tuberculum molare 



The first pair of maxillae (fig. 8) are also of a strong and solid con- 

 struction, and their length about 7 millimetres. The outer branch 2 ) (a) 

 is, at the upper end (a'), spread out somewhat in the manner of a hand, 

 hollowed on the inside, and armed at the edges with 11 stout moveable 

 spines, which with the exception of some few of the longest are furnished 

 on the one edge with side-prickles. The same branch's inner edge is also 

 bristled. The inner branch (b) is thin, soft, short, and broad, and has at 

 its point about 11 ciliated bristles. The palp (c) is two-jointed and rea- 

 ches beyond the point of the outer branch. The second joint is in the form 

 of a sabre and has a pair of short bristles at the point, as also a pair of 

 very small moveable prickles. These maxillae are in immediate contact with 

 the mandibulae. 



The 2 11,1 pair of maxillae (fig. 9) are smaller thinner and of less 

 solid construction. Their length is 5 millim. They consist of two bran- 

 ches, and are of about the same obtusangular lancet-form, and the outer 

 (a) l /, longer than the inner (/>). Both have at the point and along the 

 inner edge numerous ciliated bristles. 



The maxillipeds (Fig. 3 g g & fig. 10) are 10 millim. long, and 

 consist as usual of a stem of 2 joints (fig. 10. a, b) and of a palp (c). On 

 the inner side of the basal joint of each maxilliped is an oblong almost 

 trunoatly terminated lamina (lamina interior) which at the point and the inner 

 border bears a number of longer bristles. These laminae (Fig. 11) come 

 into contact with eachother, and form by their union a raised ridge on the 

 inner side of the maxillipeds, and reach to the end of the first third of 

 the second joint's lamina. The second joint of the stem (Fig. 10. b) is on 

 the inner fore-part expanded into a large almost elliptic lamina, the so called 

 lamina exterior (fig. 3. g'. g' & fig. 10. 6'), rounded off in front and there 

 furnished with bristles. Its Interior edge (fig. 12), is made uneven by small 

 knobs. The Palp (fig. 3. g" g and fig. 10. c, c) consists of 4 joints of which 

 the 2 nd is the largest, and the fourth has the form of a claw, and all, 

 with the exception of the last, are furnished with numerous bristles. 



') Spence Bate considers that this form of the mandibule indicates that the 

 animal consumes vegetable food. 



2 ) The outer branch may be considered as the stem of these maxillae. 



