Miscellaneous. 305 Including the genera iJistemma, liuttulus, Furcularia, und Mono-cerca, and a new genus, Monommata, with a cylindrical body, a partially hardened skin, two long caudal points, and one cer\dcal eye. Species Noiommata tigris and longisela, Ehr. Fam. 4. Scaridina, Carus. Foot long-jointed, frequently with long spines and points, not re-tractile ; skin soft or hardened. Genera Scandium and Dinocharis. Fam. 5. Philodinsea, Ehr. Body fusiform ; foot retractile like a telescope, forked at the end ; one cer\dcal movable palpus. Genera : CalUclina, Philodina, lioti-fcr, and Actinurus. Fam. 6. Loricata, Eartsch. {=Urachi(mea, diX\iS,,=^Euchlanidota aud Brachioncea^^hx.— Dinocharis.) With a hard carapace sharply separated from the head and foot ; soft parts retractile. Genera observed : Emhlanis, Lejxiddla, Meto-indiu, Brachioniis, Monostyla, Fterodlna, Anurcea, Salpimi, and Colurus. (Order) II. GASTEllODELA. Fam. 7. Ascomorpha, Perty. Body short, cylindrical, truncated in front, rounded off behind ; no intestine or anus ; one cervical eye. Under the genus Ascomot^iha (Perty) the author describes a new species, which he calls A. saltans. — Wilrttemh. naturw. Jahreshefte, xxvi. pp. 307-364. On the Blood and Blood-corpuscles of Insects and some other Invertehrata. By Dr. V. Gkabek. The blood-corpuscles of Insects and many other Arthropoda (^Epeira, Phalanr/ium, Oniscus, Jidus, Lithobius) present extraordi-nary differences, especially with respect to their relative number, size, and form, even in one and the same individual. As regards form, they show all possible transitions, from a slender sigmoid or horseshoe-shaped spindle to biconvex or sometimes perfectly flat, thin, circular disks. Protciform corpuscles also appear, although only exceptionally. Their size, or, more properly, the measurement of their longest diameter, is equally variable. It is usually from 0'008 to 0"02 millim., but also may be less (as in Cossus ligniperda), or it may attain the gigantic dimensions of 0"04 millim., or even more (in species of Asilus). Many phenomena (for example, on the addition of water), however, indicate that the majority of the blood-corpuscles observed in the same specimen possess nearly the same volume, and that tht; various forms in which they ap{)ear are for the most part caused by the very narrow coui'ses through which they have to pass in some places,
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