ZOOLOGY AND BOTANY^ MICROSCOPY, ETC. 237 



reddish, or whether it was food, or other red organisms that produced 

 the colour, 



RMzopods of Gulf of Genoa.* — Prof. A. Gruber, who described in 

 1884 some Protozoa from Genoa, gives here some notes on new and 

 little-known Ehizopods. 



Protomyxa pallida sp. n. is seen at once to dififer from Haeckel's 

 P. aurantiaca by its colourless protoplasm. It never takes on a 

 Heliozoon stage, but tends to extend itself; the streaming in the pro- 

 cesses is very lively, and the pseudopodia form such wide branches as 

 to sometimes extend over a space of 4-8 mm. The nuclear substance is 

 scattered in numerous small constituents through the protoplasm ; the 

 granules are so small that, with high powers, they are merely fine dots 

 coloured dark-red by picrocarmine ; in life they cannot be distinguished 

 from the other granulations in the protoplasm. It will be remembered 

 that Haeckel's species was said to have no nucleus, but that is only to 

 be expected when the condition of microscopical technique at the time of 

 its discovery is considered. 



Under the head of various Amoehse Prof. Gruber remarks that, on 

 several occasions, he has attempted to show that definite specific diagnoses 

 can be drawn up of these variable forms; the amount of difficulty in 

 doing so varies, and with regard to the marine species, he has not yet 

 been very successful. He has, however, recognized the species which he 

 has called Ameeha fluida. Another one, which always contains yellow 

 drops or spheres, he now calls A. glohifera, and a third, on account of 

 its yellowish colour, is called A. Jiavescens, In the last no nucleus can 

 be made out during life, but after staining, several vesicular nuclei may 

 be seen ; it is the first true multinuclear Amoeba which the author has 

 found in the sea. 



The name of Schultzia diffluens is now applied to the species which 

 the author first called Lieherkuhnia diffluens ; its whole sarcode is filled 

 with extremely small nucleoli, which become evident on treatment with 

 picrocarmine. A real member of the genus LieberJcuhnia is a new species 

 which is called L. Butschlii ; it agrees in many points with L. Wagneri, 

 as described by Maupas, but differs by its much larger size, and by the 

 characters of its nuclei. 



The protoplasm of Polymastix sol sends out processes which, though 

 they look like pseudopodial rays, are capable of flagellar movements, 

 and the question arises whether we have here a Heliozoon with flagellate 

 pseudopodia, or a Fagellate with radiate flagella ; the organism named 

 by Cienkowski Multicilia marina appears to be identical with this 

 Polymastix. 



Pseudopodia and Cilia.t — Prof. O. Zacharias refers to a statement 

 by Prof. A. Gruber in regard to Polymastix sol, in which he says, " of 

 pseudopodia which behave like cilia, nothing is hitherto known." 

 Zacharias recalls his experiments J with the spermatozoa of Polyphemus 

 pediculus which, in 3 per cent, salt solution, developed very active 

 pseudopodia. Eeference might also be made to the facts noted by 

 Geddes in his ' Eestatement of the Cell-Theory.' § 



* Ber. Naturf. Gesell. Freiburg, ii. (1888) pp. 33-44 (1 pi.), 

 t Biolog. Centialbl., viii. (1888) pp. 548-9. 

 t Zeitschr. f. Wiss. Zoo]., xli. (1884) pp. 252-8 (1 pi.). 

 § Proc. Roy. Soc. Ediu., xlii. (1883-4) pp. 266-92 (1 pL). 



