QUARTERLY CHRONICLE OF MICROSCOPICAL SCIENCE. 4l3 



these were found in the pyramids, in one case of scarlet fever. 

 The interest of these observations is very great, not only in 

 relation to pathological theories, but in connection -with the 

 asserted development of Bacteria from white blood-corpuscles 

 (see above, Oscar Grimm's paper). Such organisms as von 

 Recklinghausen describes might equally well be developed 

 from minute deeply penetrating germs, or heterogenetically, 

 as far as the evidence in this particular case goes. 



A new Radiolarian from Naples, MyxobracMa Cienkowskii. 

 — Nicolas Wagner describes in the ' Bulletin of the Imp. 

 Acad. St. Petersburg,' vol. xvii. No. 2, a Radiolarian, which 

 he found in the harbour of Naples, which is similar in form 

 to the Myxohrachia rhojjalum of Haeckel (see this Journal, 

 January, 1871), but which differs from Haeckel's two species 

 found off the Canaries, in some important particulars. The 

 structure of the central capsule differs somewhat from that of 

 Haeckel's species, which may be a mere matter of develop- 

 ment. In place of the blood-red oil drops this species has blue 

 ones. In place of being formed of a jelly-like mass the body 

 of this new Myxohrachia consists of a felt of protoplasm- 

 threads, amongst which very fine homogeneous cytods are 

 embedded. There is no definite Avail or membrane to the 

 body, but the protoplasmic felt is denser at the periphery and 

 there gives origin to radiant pseudopodia. Coccoliths and 

 Coccospheres lie in the ends of the arms, as in j\L pluteus 

 and M. rliopalutn, but in quite young examples they are 

 absent. Besides Coccoliths there are present in the same 

 protoplasm of this Myxohrachia fragments of molluscan 

 shells, very young Spirulina, and Dentalium. Wagner sug- 

 gests that the protoplasm in the ends of the arms, where 

 these fragments and the Coccoliths occur, forms a sort of 

 digestive apparatus, and that the nutrient products of diges- 

 tion pass, by means of the ray-like threads of protoplasm, 

 which extend from centre to periphery, to the region of the 

 central capsule and the alveoli which surround it. A new 

 Thalassicolla was also found which agreed with this Myxo- 

 hrachia (named by Wagner after the illustrious Cienkowski) 

 in all respects except the absence of the denser peripheral 

 layer of protoplasm which forms the dome and the arm-like 

 processes of Myxohrachia. The protoplasmic masses, form- 

 ing the ends of the arms in Myxohrachia, may be pinched off 

 from the rest of the animal by pressure, and they then lead an 

 independent life, sending out pseudopodia in an active manner. 

 A new fresh-water Radiolarian.— Oscar Grimm describes (in 

 ' Schultze's Archiv,' 4th part for 1872), under the name 

 Blaster Greefiii, a fresh-water Radiolarian from bog-pools 



