526 
ZOOLOGICAL LITERATURE. 
(Jurine)=j&wmce« longirostris (Koch), p. 147, pi. 2. fig. 12, and pi. 3. fig. 10, 
both common on the shores of lakes ) B. microps, sp. n., p. 148, pi. 2. fig. 11, 
Lake Bagsvaer, among Nymphseee, very rare j B. maritimay sp. n., p. 149, 
pi. 2. figs. 9, 10, in the midst of the Sund ; B. brevirostris, sp. n., p. 149, Lake 
Morke j B. diaphana, sp. n., p. 150, pi. 2. figs. 3-8, pi. 3. fig. 11, lakes, near the 
surface j B. lilljeborgii (Sars),p. 162, pi. 2. figs. 1, 2, from the same localities. — 
B. longirostris (Miill.) and longiseta (Ley dig), in the lake-district of Britain, 
everywhere, males rare, dilfering from the females in the anterior antennae. 
Brady, Intell. Observ. xii. p. 420. 
Acantholeberis curvirostris (0. F. Mv^\.')—Acanthocercusrigidus{^chjo^\QT)y 
P. E. Miiller, /. c. p. 153, pi. 3. fig. 7, in pools among Confervae. 
Ilyocryptus (Sars) rigidus (Lievin as Acanthocercus), P. E. Muller, 1. c. 
p. 164, pi. 2. figs. 14-18, pi. 3. fig. 6, crawling on the mud of ponds. — J. sor- 
didus (Lievin), British localities. Brady, Intell. Observ. xii. p. 420. 
(Lynceince,) 
Lynceus, The jaws are provided with conical elevations, serving as mas- 
ticating organs; oesophagus, stomach, small and large intestines can be 
distinguished ; the first pair of legs serves for swimming, the second and 
third for producing a current in the water to assist in respiration ; two sacci- 
form testicles and two vasa deferentia are lodged in a pouch of the penulti- 
mate caudal segment, and open at the base of the caudal lamina ; the females 
have well-developed ephippia, as in Daphnia, but composed of two difterent 
capsulm. The pigmental iiiass constituting the eye is originally simple in tlio 
embryo, and is afterwards divided into two. Plateau, Comptes Ilendus de 
I’Acad, Nov. 1868, Revue et Mag. Zool. 1868, p. 463. 
Bury cer CHS lamellatus (O. F. Miill.) = i. laticaudatiis (Fischer), P. E. MiUler, 
1. c. p. 162, in clear waters, common. 
Camptocd'cus macrurus (0. Fr. Miill.), P. E. Muller, 1. c. p. 164, pi. 3. fig. 12 ; 
C. rectirostris (Sch6dl.) = i. macrourus of Fischer, p. 165, pi. 2. fig. 19, pi. 3. 
fig. 13 ; C. lilljeborgii (Sch6dl.) = i. macrouruSy var., of Lilljeborg, p. 166, pi. 3. 
fig. 14, all in clear waters. — L. harpce (Baird) common in the British lakes^ 
but L. macrourus (Mull.) rather a lowland species. Brady, Intell. Observ. 
xii. pp. 420, 421. 
Acropenis leucocephalus (Koch?, Fischer) = ? striatus (Jurine) 
=? A. harpce (Baird), P. E. Miiller, 1. c. p. 167, pi. 3. figs. 16-17, pi. 4. 
fig. 26 ; A. angustatus (Sars), p. 169, pi. 3. fig. 18, pi. 4. fig. 27 ; A. cavirosirisy 
sp. n., p. 169, pi. 2. fig. 21, pi. 3. fig. 19, in the Lake IIuul-so, one specimen 
only found. 
Alonopsis elongata (Sars as Alond)-=~Lynceus macrourus (A Lievin ?, Zenker 
and Leydig, = Acroperus intermedius (Schiidler), in clear waters. P. E. 
Muller, 1. 0 . p. 171. — Lynceus elongatus (G. 0. Sars), most characteristic of 
the British mountain-lakes, often 2-3 pairs of valves superimposed. Brady, 
Intell. Observ. xii. p. 421, pi. 1. fig. 8. 
Alona acanthocercoides (Fischer as Lynceus)y P. E. Miiller, 1. c. p. 174, pi. 4. 
fig. 6, in muddy ponds, near the bottom; A. Icydigii (Schodler)=Xynce«5 
quadrangulai'is of Leydig, p. 174 ; A. oblonguy sp. n. ?, p. 175, pi. 3. figs. 22, 23, 
pi. 4. figs. 4, 6, = P Lynceus quadrangular is of Lievin and Lilljeborg, common ; 
A. quadrangularis (0. F. Miill. as Lynceus)=iA. sulcata (Schodler), p. 176, pi. 3. 
figs. 20, 21, common ; A. sanguineuy sp. n., p. 177, Lake Esrom ; A. lineata 
