FREE-SWIMMING COPEPODS OF THE WOODS HOLE REGION. 
191 
pair rod-shaped, with two bristles. Male with leaf-shaped, broadened body-segments, iridescent; 
sexual peculiarities iu mouth parts and feet not universal. 
Female: Eye-lenses contiguous or lying near together; geuital orifices pushed up some distance 
on sides of their segment. Anterior antenme 3 to 5 jointed ; sesthetasks wanting. Posterior antennae 
with a short uncinate bristle on terminal joint, otherwise with small, thin bristles. Terminal joint of 
anterior maxillipeds drawn out into a long point, terminal hook of posterior maxillipeds short and 
stout. Outer rami of feet with broad-margined, lancet-shaped outer marginal bristles as follows : 1, 1, 3 
iu first to third pairs; 1, 1, 2 (3) in fourth pair; inner rami of first pair with 1, 1, 6, in second with 
1, 2, 6, in third with 1, 2, 5, in fourth with 1, 2, 2 (1) bristles. 
Male: Abdomen with 5 segments; genital valves broad, but short, with a few bristles; terminal 
hook of posterior maxilliped elongated and articulating by means of an intermediate joint with 
second basal. 
28. Sapphirina gemma Dana. 
Female: Furca at least twice as long as broad, with a small, sometimes obsolete, point on tip of 
inner margin; insertion of innermost bristle further back than that of outermost. Eggs blue. 
Anterior antennas three- 
fourths as long as poste- 
rior ones, 5-jointed; sec- 
ond joint as long as 3 
terminal joints together. 
Inner ramus of posterior 
antenme more than two- 
thirds as long as second 
basal joint; terminal claw 
one-third as long as sec- 
ond joint of inner ramus. 
Inner ramus of fourth foot 
somewhat longer than 
outer ramus; third joint 
of inner ramus scarcely 
shorter than first and sec- 
ond joints together, with 
2 bristles at its tip. 
Male: Length of 
the body about 2} times 
as great as its greatest 
breadth ; eye-lenses on ventral surface, front projecting over them some distance. Furca, fourth pair of 
feet, anterior antennae as iu female, the succeeding appendages in part reduced. Third joint of inner 
ramus of second pair of feet with 3 lancet-shaped bristles and slightly elongated teeth. 
Coloration: “Female colorless ; bags of eggs dull bluish. Male with very brilliant blue reflec- 
tions, dazzling in the sun’s rays, with various other bright colors as the animal changes its posi- 
tion.” (Dana). 
Length of female, 1.9 to 3.1 mm. ; of male, 2.15 to 3.1. 
Three female specimens collected in tow in Gulf Stream 70 miles south of Marthas Vineyard, 
July 27, 1899. 
According to Giesbrecht Sapphirina gemma seems to prefer Salpa democratica as a host. My 
specimens were taken in company with chains of Salpa cordiformis. 
C0RYC7EUS Dana. 
Body cylindrical; cephalothorax with 2 to 4, abdomen with 2 or 3 segments; lateral portions of 
third and fourth thoracic segments prolonged into pointed projections. Furca rod-shaped, each limb 
with 4 bristles. Mandibles not hatchet-shaped, with movable appendages, similar to those of Oncaa. 
Maxillae oval lamellae. Rami of feet elongated; inner ramus of fourth pair a stub (Stummel) or 
reduced to a single bristle; fifth pair consisting on either side of 2 small bristles. Body of male not 
flattened and usually segmented like that of female, never with full number of abdominal segments. 
Mouth parts not abortive. 
