Dr. M. Verworn's Biological Studies of Protista. 155 



Sternoccelis Lewisi, Reit. Wien. ent. Zeit. ii. p. 143 1883 1 



Eeit. Deutsclie ent. Zeitschr. xxviii. > Europe. 



p.75, pi. i. fig. 4 1884) 



extructisternum, Lewis, n. sp 1888 Algeria. 



grandis, Reitter, Wien. ent. Zeit. ii. p. 143 . . 1883 Europe. 



Igevidorsis, Fairm. Pet. Nouv. ii. n. 148, p. 37 1876 Algeria. 



incisus, Schmidt, Deutsch. ent. Zeitschr. xxix. 



p. 440 1885 Europe. 



pluristriatus, Fairm. Pet. Nouv. n. 163, p. 98 1877 Algeria. 



fusculus, Schmidt, Ent. Nachrichten 1888 Europe. 



mauritanicus, Lewis, n. sp 1888 Morocco. 



pectoralis, Lewis, n. sp 1888 Algeria. 



Marseuli, Bris. Ann. Soc. Ent. Fr. p. 367 1866 Europe. 



Satrapes, Schmidt, Deutsch. ent. Zeitschr. xxix. 1885. (Type talyscheiisis.) 



Sartorii, Redtenb. Fu. Austr. p. 311 1858 I -p,,„^p 



Rayei (Eretmotus), Mars. Abeille, i. p. 348 1864 \ -^"^ope- 



Reitteri, Lewis, n. sp 1888 Europe. 



talyschensis, Reitter, Wien. ent. Zeit. ii. p. 143 1883 Europe. 



Note. — An asterisk is attached to the species I have not seen. If natu- 

 ralists who go to mountainous places and remote forest-lands to collect 

 insects wiU pay attention to this class of beetles, the number in our cabinets 

 will be quickly doubled. 



XIX. — Biological Studies of Protista. 

 By Dr. Max Verwoen *. 



[Plate IX.] 



I MADE the following researches on Protista when, for the 

 purpose of certain psychophysiological investigations which 

 will hereafter be pulDlished in their entirety, I set myself the 

 task of observing the process of shell-formation in the shelled 

 freshwater Rhizopoda. In the case of those forms which 

 build their shells with materials produced by themselves this 

 process has been described and illustrated with figures in 

 previous memoirs, especially by Gruber f^ and recently in a 

 very detailed fashion by Schewiakoff \ ; and therefore my 



* Translated from the 'Zeitschrift fiir wissenschaftliche Zoologie,' 

 Band xlvi. pp. 455-470, with a plate. 



t A. Gruber, " Der Theilungsvorgang bei Euglypha alveolata" in 

 Zeitschr. f. wiss. Zool. Bd. xxxv., and "Die Theilung der monothalamen 

 Rhizopoden," ihid. Bd. xxxvi. 



X W. Schewiakoff, "Ueber die karyokinetische Kerntheilung von 

 Euylypha alveolata," iu Morph. Jahrb. Bd. xiii. 



