EXPLANATION OF THE PLATES 



Reference letters. 



a, = antennule. 



a, = antenna. 



ae (PL II) =^ aesthetasc. 



ap ~ posterior part of abdomen. 



b (PI II) = basal segment of thoracic feet. 



c (PI. II) = furcai setæ. 



ce — head (cephalon). 



dil dilatator muscle. 



/f — -• genital segment. 



go ^ genital opening. 



i inner ramus of thoracic feet. 



in — intestine (mid-gut). 



/ -~ lateral outgrowth from genital segment. 



md (PI. II) -r mandible. 



nul (PI. 1) longitudinal dorsal muscle. 



rndl longit. dorso-lateral muscle. 



mv - longit. ventral muscle. 



mx = maxilla. 



mxj = maxillula. 



nv = ventral ganglionic mass. 



o = month-opening. 



od = oviduct. 



æ =■-■ oesophagus. 



ov = ovary. 



Pi — p^ — thoracic feet. 



rs = receptaculum seminis. 



spf = spermatophore. 



te = testis. 



Uii—th^ = thoracic segments. 



ul = upper lip. 



vd = vas deferens. 



vg -^ 



y 



vagina, 

 outer ramus of thoracic feet. 



