762 CRUSTACEA. 



which have the longest epimerals, have no spine or tooth on either 

 side ; the epimerals of these segments are full one-half longer than the 

 length of the segment along the back. The lateral process of the 

 two anterior abdominal segments is bent backward, and reaches even 

 beyond the line of base of last segment. Outer branch of caudal 

 appendages extends nearly half its length beyond the abdomen, and 

 is almost twice as long as inner ; inner angle of base prolonged and 

 acute. Eyes scarcely visible, very pale. Anterior antennsB seven- 

 jointed, posterior ten-jointed; first joint of anterior longest, and 

 penult longer than either of the two preceding; first joint of posterior 

 short, second longest. Third pair of legs little smaller and with smaller 

 claw than either of the two preceding; seventh pair more slender 

 than preceding, the basal joint about as long as the remaining portion, 

 while in the other legs it is nearly twice as long as the following 

 joints; claw also half smaller. Five pairs of thoracic membranous 

 leaflets, arising from base of five anterior pairs of legs ; eggs below, as 

 in Cymothoa. Distance between the fifth, sixth, and seventh legs 

 larger, the anterior legs rather crowded. 



Nerocila tenuipes. 



Corpus angustum, oblougo-ovatum, paulo convexum. Thorax lateribus 

 non armatus, segrnentis duobus posticis later aliter brevissimd acutis et 

 stride appressis. Epimerm duve posticce utriusque lateris acutw, &ta 

 subacutd, Qtd basin 7mo3 non attingente. Abdomen vix oblongum, seg- 

 rnentis duobus anticis lateraliter longd productis, tribus sequentibus 

 paulo productis, ultimo paululo transverso, scutiformi, posticd ad me- 

 dium obtusi-angulato. Appendices caudales abdomine paululo lon- 

 giores, angulo basis interno obtuso, ramis fere acquis, extemo obtuso, 

 interno parce breviore, oblique truncato. 



Body narrow, oblong-ovate, little convex. Thorax with the sides not 

 armed, last two segments very short acute either side and close 

 appressed. Two posterior epimerals either side acute; the fifth 

 subacute, sixth not reaching to base of seventh. Abdomen a little 

 oblong, first two segments long-produced on either side, next three 

 short-produced ; last not as long as broad, scutiform, at middle be- 

 hind low obtuse-angled. Caudal appendages slightly longer than 



