212 THE AMERICAN NATURALIST. [Vor. XXXIV. 
Genus Aloatanais Norman and Stebbing. 
Aloatanais hastiger Norman and Stebbing, JV, 1750 fms. 
Genus Heterotanais G. O. Sars. Heterotanais limnicola Harger, JV, 48 fms. 
Genus Leptochelia Dana. 
a. Gnathopods in male greatly elongated, with tuberculate immobile finger. 
Upper antenne three-jointed, with rudimentary flagellum in female, 
much more elongated, and with a multi-articulate flagellum in male. 
b. Inner branch of uropoda five-jointed. Antennulz, with 
basal segment nearly one-half length of the whole organ, 
are more than one-third as long as the body. 
Leptochelia rapax Harger, JV, one-half fm. 
’. Inner branch of uropoda six-jointed. Antennule, with 
basal segment about one-third length of the whole organ, 
are about two-thirds as long as body. 
Leptochelia savignyi (Krøyer), N, surface 
a’. Gnathopods in male not greatly elongated. Upper antennæ three- 
jointed, not elongated in male. 
b. Inner branch of the uropoda five-jointed. Terminal abdominal 
segment rounded behind. 
Leptochelia (?) filum (Stimpson), JV, 8 fms. 
FK. Inner branch of the uropoda six-jointed. Terminal abdominal 
segment pointed posteriorly. 
Leptochelia dubia (Krøyer), JV, surface to one-half fm. 
Genus Neotanais Beddard. JVeotamazs americanus Beddard, M, 1240 fms. 
FAMILY II. APSEUDID. 
a. Lower antennz with a scale articulated to the end of the second joint. 
First free segment of the thorax with epimera conspicuous, spine- 
formed, porrected. First five pair of pleopoda with both branches 
usually one-jointed. Exopods on both pairs of gnathopods. 
Apseudes Leach 
a. Lower antennz without a scale. Carapace composed of head and two 
following segments coalesced. . Sphyrapus Norman and Stebbing 
Genus Apseudes Leach. 
Apseudes gracilis Norman and Stebbing, W, 1750 fms, 
Genus Sphyrapus Norman and Stebbing. 
. Sphyrapus malleolus Norman and Stebbing, N, 1450 fms. 
II. FLABELLIFERA. 
a. Legs in the adult in six, apparently only in five pairs. 
Family III. Gnathiidæ 
a’. Legs in the adult in seven pairs. 
