C Y M T H I D E A. 753 



Length, one and one-fourth inches. Antennae curve around in a 

 semicircle near the head ; third and fourth joints of second pair longer 

 than second joint. The four anterior thoracic segments are but little 

 shorter than their breadth. The epimeral pieces of the anterior 

 segments of thorax are oblong and prominent either side. Coxae of 

 legs very broad, claws large and much curved. Caudal appendages 

 do not extend beyond the extremity of the abdomen ; not seen in 

 dorsal view, being concealed under the margin. Eyes near anterior 

 angles of head, not very distinct. 



Ceratothoa crass a. 



Corpus latum, crassum, subovatum, segmento thoracis 4:to duplo latiore 

 quam lmum. Caput fronte productum. Segmentum thoracis lmum 

 capite subito lathis, antice parce productum, processubus latis, trun- 

 catis. Segmentum caudale 4:to thoracis segmento paulo angustius, 

 duplo latins quam longum, extremitate rectiusculum, parce excavatum, 

 stylis caudalibus brevibus, non exsertis, ramis ovatis, subacutis. Coxa 

 pedis 7mi lati transversa. 



Body broad and stout, subovate ; fourth thoracic segment twice broader 

 than first. Head produced in front. First thoracic segment ab- 

 ruptly wider than head, the processes either side of head very 

 short, but wide and truncate in front. Caudal segment a little 

 narrower than the fourth thoracic, twice as broad as long ; posterior 

 margin nearly straight transverse, slightly excavate ; caudal stylets 

 short, not exsert, branches ovate, subacute. Coxa of seventh pair 

 of feet very broad transverse. 



Plate 50, fig. 2 a, body in outline, enlarged one and one-half dia- 

 meters; b, stylets, enlarged one and one-half diameters; V , same, 

 more enlarged ; c, leg of sixth pair, showing coxa much wider than 

 its length. 



From the Southwestern Pacific. 



Length of body, thirteen lines; breadth at middle, six lines; 

 breadth of last abdominal segment, five lines. The preceding four 



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