KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 35. N:0 5. 53 



CUiata. 



Codonella fenestrata n. sp. 



(Pl. VII, fig. 15). 1 



Posterior part rounded, slightly loiiger than bi'oad, covered with numerous small 

 paxticles of sand. The anterior part as long as the posterior but soinewhat narrower, 

 cylindrica], hyaline, perforated by a iiumber of large circular openings, arranged m spirals. 

 Length 0,i, diameter 0,04 mm. 



Cyttarocylis Markusovszkyi v. Dad.? 



The form which with some hesitation I have classiiied under the abo^■e name was 

 very large, 0,4 mm. in length and (),ii in diameter. The alveoli of the house were much 

 smaller than on the fig. of v. Daday. Probably a variety of C. Ehrenhergii." 



Radiolaria. 



Myelastrum Aurivillii Cl. n. sp. 



(PL VIII, tig. 1). 



Foiir-armed; one arm being undivided and the three others o-tid. Distance between 

 the arms l,i mm. 



Pteroscenium Aurivillii Cl. n. .sp. 



(PL VIII, tig. 2). 



Shell as long as broad, campanulate, ^v■ith ir]'egular rounded pores. Columella with 

 some few verticills. Horn ^'a as long as the shell. Feet short. Distance between the 

 feet 0,15 mm. 



Triastrum N. G. 



Porodiscida with three spongy, not branched and not chambered arms. 



This genus difters from Euchitonia in the arms not being chambered. It is nearly 

 allied to HiECKEL's genera Dicranastrum, Pentopliiastrum and Myelastrum, which I should 

 like to group with Triastrum in one genus, were it not that this would disarrange H^ckel's 

 system. I therefore prefer to from a new genus. 



;|^ !■■.!■,■ ■ ■ i: ■: '.[■\\i- ■ <: -'i ".rf ;;! ! : i-, 



Triastrum Aurivillii Cl. n. sp. ' •' - ' ' »^ i- 



(PL VII, tig. IG, 17). 



Distance between the paired arms somewhat shorter than between the paired and 

 the odd arm. Ends of the arms with some few silicious needles. Central disc small, with 

 about 4 rings. Distance between the paired and the odd arm 0,8 to l,i mm. 



^ Since the above was written this species has beeu described by Schmidt (Videnskabl. Meddel. tVa den 

 Naturh. Förening i Kbhvn 1901, p. 187) under the name C. Ostenfeldn, which name thus bas priority. 

 - Undella carnpanula SCHMlDT L c. pag. 190 seems to represent the same form. 



