FREE-SWIMMING COPEPODS OF THE WOODS HOLE REGION. 
181 
A few males and females of this handsome species were taken only on two occasions, July 17 and 
July 26, 1899, at 8 a. m., from the Fish Commission wliarf at Woods Hole. The night before each of 
these days had been very stormy, with wind from southeast. 
ANOMALOCERA Templeton. 
Fourth and fifth thoracic segments separated; head with lateral hooks; 2 pairs of dorsal eye- 
lenses; ventral eye in male more strongly protruding than in female; rostrum without lenses; rostral 
prong powerful; fifth thoracic segment pointed on either side, asymmetrical in male. Abdomen of 
female with 3 segments, in female and male asymmetrical. Anterior antennae of female 20-jointed ; 
in right one of male joints 13 and 11, 19 to 21, 22 to 25 are fused. Mandibular blade with hook-like, 
pointed teeth. Second basal joint of 
maxilla as large as second inner lobe; 
third inner lobe present. Posterior 
maxilliped 7-jointed, inner ramus of first 
pair of feet 3-jointed. 
Female: Cephalothorax 6-jointed; 
the last thoracic segment on each side 
extending out into a pointed projection. 
Abdomen with 3 segments, asymmetri- 
cal. Anterior antennae short, 20-jointed ; 
joints 6 to 8, 9 to 11, 24 and 25 fused; 
appendages similar to those of Pontella. 
Outer ramus of posterior antennae short 
and slender, about one-third as thick as 
proximal joint of inner ramus, which is 
fused with second basal joint. Basal 
joint of mandibles thicker, second inner 
marginal lobe of maxilla larzer than in 
Pontella (somewhat longer than second 
basal joint, which is fused with two 
joints of inner ramus); the succeeding 
appendages similar to those of Pontella, 
hut outer ramus of fifth pair of feet is 
2-jointed. 
Male: Sexual differences in struc- 
ture of trunk, anterior antennae, and 
fifth pair of feet. Ventral eye pyriform, 
more strongly protruding ; last thoracic 
segment asymmetrical, on right side 
witli a curved hook. Abdomen with 5 
segments; genital opening sinistral ; the 
anterior segments asymmetrical, first 
with an outgrowth on right side. Slight differences in left anterior antenna; right similar to that 
of Pontella, and same is true of fifth pair of feet, the forceps of which, however, is less powerfully 
developed. 
18. Anomalocera patteisonii Templeton ; a, female, dorsal aspect; b, male, 
dorsal aspect; c, male, right anterior antenna-, d, male, fifth pair of feet; 
e, female, fifth foot. 
18. Anomalocera pattersonii Templeton. 
The strongly marked character of the only species of the genus Anomalocera may be gleaned in 
great part from the above figure. In its coloration it is rather opaque dark-blue or blue-green, 
occasionally ferruginous red. There is a series of median dorsal black blotches of very constant 
occurrence, with much more variable irregularly ramifying dark-blue markings on sides of thoracic 
segments. Gut usually bright green. Eggs white or reddish. 
Length of female, 3.5 to 4.1 mm; male, 3.2 to 3 mm. 
At Woods Hole this species is taken, so far as I have observed, only after stormy weather with 
prevailing southwest winds, either alone or in company with Pontella meadn. It was far more 
abundant in the tow collected by the Grampus in the Gulf Stream, about 70 miles south of Marthas 
Vineyard. 
