Lampbrush chromosomes from semi-albino crested newts,Triturus Cristatus Carnifex (Laurenti)

Riassunto Sono stati studiati i «lampbrush chromosomes» di mutanti semi-albini diTriturus cristatus carnifex. Il rilevamento degli organizzatori nucleolari ha permesso il completamento delle mappe cromosomiche della specie.

---

---

This work was financially supported by C.N.R., Rome.     

Intramitochondrial complexes of atypical structures in hepatocytes ofTriturus alpestris (Laurenti)

Résumé Des structures lamellaires sont décrites dans la matrice mitochondriale du foie de triton (Triturus alpestris).     

Neurosensitive contacts and new kind of synapses in wall lizard (Lacerta muralis, Laurenti) pineal body]

The neurosensitive synapses between photoreceptor cells and nerve ganglion cells are numerous enough to constitute an additional argument for a photosensitive function of the pineal gland. A new type of synapse, observed between the secretory rudimentary photoreceptor cells and nerve ganglion cells presents a direct relation from cells showing an active secretory function to the central nervous system.     

Calcitonin-like peptide in the shrimpPalaemon serratus (Crustacea,Decapoda) during the intermolt cycle

Summary A molecule immunologically related to salmon calcitonin has been detected in the hemolymph of the shrimpPalaemon serratus. Its concentration varies inversely with the calcium level during the molt cycle; a maximum (14 ng/ml) is found in the post-molt stage and a minimum (0.5 ng/ml) during the premolt stage.     

Osmotic concentration of the contractile vacuole ofAmoeba proteus following UV-light irradiation

Zusammenfassung Nach UV-Bestrahlung erweist sich die osmotische Konzentration der pulsatilen Vakuolen vonAmoeba proteus als unverändert.