206 GEOL. AND NAT. HIST. SURVEY OF MINNESOTA. 
Daphina cephalata Schoedler is named from rude drawings 
by King, which, if they show anything, seem to prove that they rep- 
resent an abnormality, probably of D. kingii. The sac like disten- 
sion of the head is at the expense of the lower part of the head. 
Daphnia macrura Dana is identified by Schoedler with D. carinata 
King. 
Daphnia kisilkumensis Schoedler—D. vitrea Uljanin is apparently D. 
longiremis Sars. 
Daphnia newportii Baird, from India, is quite insufficiently de- 
scribed but belongs to the D. schefferi group. 
Schoedler mentions Daphnia brasiliensis Lubbock and Daphnia gran- 
aria Gay, from Chili. 
Haldemann’s Daphnia reticulata may be D. pulex and his Daphnia 
abrupta is Simocephalus, 
Daphnia lumbholtzii Sars. 
BYVARE Ovi ShiGen6. 
This species from Australia is well characterized by acute depressed 
frontal spine and the flaring fornices which end in curved spines of 
considerable length. The male and ephippial female lack the frontal 
spine but preserve the long spine springing from the upper angle. 
Theantennules of the malesare very long and the flagellum two-jointed 
and about as long as the antennule. The claw of the first foot is 
greatly developed. The claws have no spines. The anal teeth are 
12 or more. Abdominal processes discrete. — 
FAMILY BOSMINIDE. 
Small cladocera of remarkable form, due to the great elongation 
and modification of the antennules, which are seated on a small con- 
ical beak-like projection of the ventral aspect of the head and form 
long, jointed, probosis-like appendages curved in various ways. The 
shell is laterally compressed and not sharply separated from the 
body. There is frequently a sharp spine at the caudo-ventral angles 
of the shell. The surface is reticulate, striate or smooth. Feet, six 
pairs. The first pair hooked in the male. The antenne have three 
and four jointed rami and are very small. The post-abdomen is trun- 
cate and the claw is seated on a considerable prominence. Macula 
cerebri and cceca absent. 
As there is but the single genus [ Bosmina] we have included gen- 
eric characters, 
