Miscellaneous. 305 



Including the genera Distemma, Battulus, Furcularia, and Mono- 

 cerca, and a new genus, 



Monommata, with a cylindrical body, a partially hardened skin, 

 two long caudal points, and one cervical eye. Species Notommata 

 tigris and longiseta, Ehr. 



Fam, 4. Scaridina, Carus. 



Foot long-jointed, frequently with long spines and points, not re- 

 tractile ; skin soft or hardened. Genera Scandium and Dinocliaris. 



Fam. 5. Philodinsea, Ehr. 

 Body fusiform ; foot retractile like a telescope, forked at the end ; 

 one cervical movable palpus. Genera : Callidina, Philodina, Roti- 

 fer, and Actitiurus. 



Fam. 6. Loricata, Bartsch. 

 { = Bi-achionea, C»x\xs,,= Euchlanidota and Brachiuncsa,'EhT.—Dinocharis.) 

 With a hard carapace sharply separated from the head and foot ; 

 soft parts retractile. Genera observed : Eiuhlanis, Lejiudella, Meto- 

 jjidia, Brachionus, Monostyla, Pterodina, Anurcea, Salpina, and 

 Colurus. 



(Order) II. GASTERODELA. 

 Fam. 7. Ascomorpha, Perty. 



Body short, cylindrical, truncated in front, rounded off behind ; 

 no intestine or anus ; one cervical eye. 



Under the genus Ascomorjjl^o^ (Perty) the author describes a new 

 species, which he calls A. saltans. — Wiirttemh. naturw. Jahreshefte, 

 xxvi. pp. 307-364. 



On the Blood and Blood-corpuscles of Insects and some other 

 Invertebrata. By Dr. V. Geabee. 



The blood-corpuscles of Insects and many other Arthropoda 

 (^Epeira, PJialanyium, Oniscus, Jidus, Lithohius) 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 j^erfectly flat, 

 thin, circular disks. Proteiform 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 the various 

 forms in whidi they appear are for the most part caused by the very 

 narrow coui'ses through which they have to pass in some places. 



