180 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Female: Cephalothorax 6-joiuted; rostral prongs stout, with a common broad base, the cuticle of 
which is converted into a lenticular thickening; last thoracic segment prolonged on either side into 
1 or 2 points, sometimes asymmetrical. Anterior antennae short, 24-jointed (twenty-fourth aud 
twenty-fifth joints fused), with indistinct boundaries between several of the joints; appendages 
similar to those of Labidocera. In posterior antenna*, the distal basal, joint is only incompletely sepa- 
rated from proximal joint of inner ramus; outer ramus narrower than inner and about as long as 
proximal joint of latter. This appendage as well as mandible (blade with 7 teeth), the maxilla 
(distal basal joint L} times as long as second inner marginal lobe), and also the anterior maxilliped 
similar to that of Labidocera. Posterior maxilliped with 7 joints (inner ramus 5-jointed) ; first to 
fourth pair of feet with 3-jointed outer ramus; inner ramus of first pair 3-jointed, of second to fourth 
pairs 2-jointed; first basal joint with plumose inner marginal bristle on all pairs, second basal joint 
with plumose outer marginal 
bristle on fourth, and sometimes 
with an inner marginal bristle 
on first pair. Number of bristles 
of rami as in Calanopia ; fifth pair 
of feet as in Labidocera. 
Male: Sexual differences in 
structure of trunk, of anterior 
antenme, and of fifth pair of feet. 
Dorsal eye-lenses as in female; 
rostral lens often much thicker 
than in that sex; last thoracic 
segment departing from that of 
the female, usually symmetrical. 
Abdomen with 5 segments ; geni- 
tal opening sinistra!, otherwise 
symmetrical. In left anterior 
antenme the middle joints are 
shortened, msthetasks larger; 
right anterior antenna a power- 
ful grasping organ with some 
times much dilated middle 
joints ; joints 13 and 14, 19 to 21, 
22 to 25 are fused ; also in incras- 
sated proximal region there are 
some less complete fusions of 
joints; anterior border of seven- 
teenth to twentieth joints with ridges and projections, which are usually striated. Fifth pair of feet 
like that of Labidocera, but without a rudiment of an inner ramus in left foot. 
17. l'ontella meadii new species; a, male, dorsal aspect; h. female, dorsal aspect; 
c, male, right anterior antenna; d, male, fifth pair of feet; e, female, fifth foot. 
17. Pontella meadii new species. 
This species closely resembles V. lobiancoi Giesbrecht, but may be readily distinguished from this 
and other species by peculiarities in structure of last thoracic segment, abdomen, fifth pair of feet 
in both sexes, and by grasping antenna of male. In the male there is no projection on anterior 
surface of eighteenth joint of grasping antenna, and first joint of outer ramus on right fifth foot is 
provided with two flattened lobes separated by a diastema; terminal joint of left fifth foot end in 
three claws, of which oue is more than twice the length of the others. In the female the inner ramus 
of fifth pair of feet is half the length of outer, whereas in lobiancoi it is much shorter. In both 
sexes the last thoracic segment is asymmetrical. Abdomen of female with three segments, of which 
the first and second are asymmetrical, the first having a projection on its right posterior, the second 
on its left posterior corner. Furca nearly symmetrical. 
Coloration: Dark bluish-green, especially on head, abdomen, and along edges of cephalothorax. 
More dorsal portions of cephalothorax glistening silvery white, more or less suffused with green, 
along sides with some reddish pigment, especially in young specimens. In middorsal line is a series 
of deep-black blotches, one to each segment, blotch on posterior portion of cephalic segment some- 
times divided. Some black pigment along sides of posterior thoracic segments. Chitin of ventral 
surface and appendages pale green. 
