6 Crust. 
CRUSTACEA. 
cardiacal part, which is absent in all Eucyphota. Porcellana belongs in 
this respect to the Galateidcv , and Lithodes to the Paguridce. Also the 
Squillidce , Mysidce, and Cumacea have typically homologous parts ; the 
middle iufero-median piece of the pyloric part has one row of bristles in 
Diastylis , two in Mysis , three in Gammarus , and numerous ones in the 
higher Malacostraca , their number increasing remarkably with the higher 
systematical position of the individual forms. Z. wiss. Zool. xxxix. 
pp. 444-536, pis. xxix.-xxxi. 
F. Mocquard begins a detailed paper on the stomach of the Podoph- 
thalmous Crustacea , giving first the literature of the subject, and then 
passing to the description of that of the Brachyura generally, and espe- 
cially that of 12 species of Cyclometopa } 17 Catometopa, 6 Oxyrrhyncha } 
6 Oligorrhyncha ( Calappidce , Corystulce , Dorippidce), 2 Microcephala 
( Leucosiidce ), 1 Dromia , 1 Homola, and 1 Banina. Among the Macrura y is 
described that of 3 Iiippidce ) 8 Lithodklce and Paguridce , 4 Porcellanidce 
(including ffiglta ), 4 Galateidce , 4 Palinuridce (including Scyllarus ), 1 
Eryonid (P entacheles validus ), 2 Thalassinidce , 5 Astacidce, 17 Penceidce , 
and 1 Pasiphcea. Ann. Sci. Nat. (6) xvi. Nos. 1-3, Art. 1, 188 pp. (not 
yet finished). 
3. Circulation and Respiration. 
C. Claus makes some observations on the circulatory organs of the 
Stomatopoda : he describes the heart in the larval stages of Alima and 
Erichthus ; points out that the whole system of cerebral vessels may 
be regarded as a large vascular loop, analogous to the more simple vas- 
cular loops in the ganglia of the ventral chain ; and states the existence 
of a large median ventral artery in this Order of Crustacea. Arb. Inst. 
Wiirzb. v. pp. 1-12, 3 pis. 
Yves Delag es describes at length the organs of circulation in Mysis , 
stating that they are arranged on the same general plan as in the Deca- 
poda , but in a lower degree of perfection, the vascular circulation being 
interrupted by considerable lacunae, and the arterial blood not being 
throughout separated from the venous. Respiration is seated, according 
to him, in the vessels in the dorsal shield, and he thinks it is the same 
also in the larvae of the Decaqjoda before the development of gills. Arch. 
Z. exp6r. (2) i. pp. 105-130, pi. x. 
Haemoglobin in the blood of Apus, and probably also of Daphnia and 
Cypris ; P. Regnard & R. Blanchard, Zool. Anz. 1883, pp. 253-255. 
E. R. Lankester states that he found it in 1869 in Daphnia and Chiro- 
cephalus ; tom. cit. p. 416. 
4. Organs of Generation. 
H. Friedrich describes the genital organs and propagation of the 
Oniscidce ; he agrees in many points with the statements made by 
J. Schobl, 1879 [Zool. Rec xvi. Crust, p. 38]. The ccecal appendages of the 
testicles are, according to him, the homologues of the ovary in the male 
