ga Harfordit. 
Sides of thorax almost straight, segments sub-equal. Cephalic shield 
rounded in front, eyes conspicuous, situated at the postero-lateral angle of 
shield. Abdominal segments five or four, last segment pointed. Exterior 
antenne more than half the length of body, flagellum more than twice the 
length of base, many-jointed. 
Epimera of all the thoracic segments except the three first, pointed be- 
hind, and extending further back than the segment to which they are at- 
tached. Claws of first three pairs of legs comparatively feeble. 
Length, 0.63 in. 
Collected at Santa Rosa Island by W. G. W. Harford, under stones at mid- 
tide in muddy places. Numerous. 
LEga alaskensis. 
Body broadest at 5th thoracic segment, sides regularly curved, 5th and 6th 
thoracic segments greatly larger than first four thoracic segments, 7th segment 
longer than 4th. 
Head pointed in fronted, the sides continuing the curve of the thoracic seg- 
ments. Epimera of 4th segment pointed posteriorly, as are also those of oth, 
6th and 7th thoracic segments. 
First four segments of abdomen concave posteriorly, and ending laterally in 
a point directed backwards; 5th segment with a straight posterior margin, 
pointed at sides; terminal segment a half oval. 
Eyes large, conspicuous, not projecting. Antenne short, the outer reach- 
ing to the suture between Ist and 2d thoracic segments; flagellum about equal 
in length to base. Last four pairs of legs somewhat spinose. 
Color (in alcohol) 4th, 5th, 6th and 7th thoracic segments dark brown, a 
little dark brown on posterior part of 4th and 5th akdominal segments, rest 
of body yellowish; egg-case dark brown. 
Three specimens, all females, taken from codfish caught in Ounimak Pass, 
Alaska, lat. 54° 40°, long. 165°, by Capt. T. W. Williams. 
Length of largest specimen, 1.30 inch: greatest breadth, 0.48 inch. 
Lygia septentrionalis. 
Two posterior thoracic segments much shorter than the anterior ones, and 
greatly curved. Caudal stylets short, about half as long as abdomen. 
Outer antenne about half as long as body, fiagellum with twelve somewhat 
oblong joints, somewhat shorter than base. Cephalie shield with a waved, 
somewhat two-lobed posterior margin. 
Length, without caudal stylets, 0.80 in. Width, 0.45. 
The sides,.from the second to the sixth thoracic segment, are almost paral- 
lel. Two specimens from Tanaga, one of the Aleutian Islands, presented by 
Mr. W. J. Fisher, naturalist of the U. 8. Exploring Ship Tuscarora. 
The general facies of this species is very like L. occidentalis, but it is easily 
distinguished by its short posterior stylets. 
