ZOOLOGY AND BOTANY, MIOKOSOOPY, ETC. 755 



tions, and an encystment providing new colonies. (3) Solid nourishment 

 is not introduced into the interior of the protoplasm. (4) CMlomonas 

 Paramecium, is distinct from Cryptomonas. 



Protozoa of Corsica.* — Prof. P. Gourret and M. P. Eoeser report on 

 the fifty-seven Protozoa which they have found in the new port of 

 Bastia. Among the new forms described by them, Colpoclopsis latifrons 

 g. et sp. n. is a holotrichous Infusorian which has close relations to 

 Colpoda, but differs in the absence of the tuft of oral cilia, and by the 

 possession of a posterior tuft of large cilia ; as in CryptocJiilum, the body 

 is compressed laterally. Cryptocliilum fusiforme sp. n. has no long rigid 

 seta at its hinder extremity, nor has it any longitudinal cuticular stride. 

 Aulax paucisetosa g. et sp. n. has a more or less oval body, provided 

 with four tufts of cilia, two of which are antero-lateral and two postero- 

 dorsal and postero-ventral, there is a caudal seta, and the body is divided 

 by a ventral groove (whence the generic name) into two equal parts. In 

 front of the mouth, which is situated in this groove, there is a triangular 

 vibratile membrane. It seems to be most closely allied to Lemhadion, 

 with affinities to Oyclidium and Colpidiiim. 



Clypeolum is a new genus of the Peritricha, which does not appear 

 to be closely allied to any known form. The body is conical, with the 

 apex posterior ; the dorsal surface is divided by a transverse groove into 

 two unequal parts, of which the posterior is the larger. The ventral 

 surface is moderately convex ; the buccal pit describes the half of a 

 spire, occupies the anterior portion of the ventral surface, and is pro- 

 vided with vibratile cilia and a membranella ; the dorsal cones are 

 armed with cilia, which serve to fix the animal. 



Among the Hypotricha Chilodon auricula, JSgyria semilunaris, cris- 

 tata, compressa, Kerona ciliata, and HolosticJia curonata are regarded as 

 new species. Amphisiella is a new genus allied to Amphisia, but it has 

 only one row of ventral cirri, and the oral pit is completely ventral and 

 not at all anterior in position. Stylcnethes fusiformis sp, n. has much 

 resemblance to the incompletely known OxytricJia scutellum, which Cohn 

 has, there can be little doubt, referred to a wrong genus. Psilotrix ovalis 

 g. et sp. n. seems to be most closely allied to Actinotricha saltans, but it 

 differs in the form of its mouth. 



Paramonas ovalis is a new species of Eustomata-monomastiga cha- 

 racterized by its oral excavation, and Dinomonas raediocanella and D. 

 acuta are new Eustomata-dimastiga. The only new Ehizopod is Amoeba 

 monociliata. 



Biological Studies on Protista.j — Dr. M. Verworn, in the course of 

 some psychophysiological investigations, has observed the process of 

 test-formation in some of the test-bearing fresh-water Ehizopods. The 

 form selected was Difflugia urceolata, and some further observations were 

 made on the marine Polystomella crispa. 



The author found that, in Difflugia, the formation of the test was 

 effected in just the same way as in other fresh-water Ehizopods, with 

 the difference that only foreign bodies were taken up to form the test 

 by certain reflex processes. There was no regeneration of an injured or 

 removed test by the protoplasmic body, though the vital functions were 

 carried on normally. "With Polystomella the result was very different ; 



* Arch, de Biol., viii. (1888) pp. 139-204 (3 pis.). 



t Zeitschr. f. Wiss. ZooL, xlvi. (1888) pp. 455-70 (1 pi.). 



