KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 32. N:0 3. 



31 



Peridixim (?) iutrieatum Cl. N. sp. Shell irregulaiiy polyhedral, of a very loose. 

 and irregulai- frame-work with large, polygonal meshes, the apical being the largest. Basal 

 plate with three large meshes of about the same size. Horn short. 



Pl. II, fig. 8 a and b in diiferent foci. 



Diameter of the shell 0,os rara. 



Deep-sea haul: 29 — 30 VII. Lat. N. 78° 13'. Long. W. 2° 58'. 



2,600 — O m. One single speoimen. 



P. (?) laxum Cl. N. sp. Shell irregularly polj^hedral of a very loose frame-work, 

 with large polygonal and irregular meshes, the apical being the largest. Basal plate with 

 two Cardinal and two jugular meshes of about the same size. Horn a fine bristle, half 



as long as the shell. 



Pl. II, fig. 9 a, i (in different foci). 



Diam. of the shell 0,0d mm. 



Deep-sea haul: 5. IX. Lat. N. 71° 50'. Loug. E. 19° 2'. 



230 — O ra. One single specimen. 



P. (?) minutum Cl. N. sp. By this name I denote provisionally a very small shell, 

 which perhaps might be the primordial shell of Dictyophimus gracilipes or Acanthocorys 

 umbellifera, to which I have not yet succeeded in finding transitional forms. It is repre- 

 sented on the Pl. III, fig. 1 a, b, c, the two latter being the same shell in different foci. 

 — The diameter of the shell 0,o3 to 0,04 mm. 







Deep-sea 



hauls : 







Date. 



Lat. N. 



Long. 



Depth. 



Fq. 



Pl. 



23—30 VII 

 27 VIII 



78° 13' 

 71° 50' 



2° 58' W. 

 9° 36' E. 



2,600—2 m. 

 400-0 . 



r 

 r 



CS 

 CS 



Phorticium pyloiiium Hkl. To this variable and cosmopolitan species I refer the 

 shell figured on the Pl. III, fig. 2 a, b, c. The fig. d represents the primordial shell, 

 which occurs isolated in the deep-sea gatherings and bears a strong reserablance to Haliomma 

 cequorea Ehb. (Microg. XIX, 51 from Aegina). 







Deep-sea 



hauls : 







Datc. 



Lat. N. 



Long. 



Depth. 



Fq. 



Pl. 



29—30 VII 



78° 13' 



2° 58' W. 



2,600-0 m. 



r 



S C 



1 VIII 



76° 36' 



12' 13' E. 



500-0 > 



r 



TS 



27 VIII 



79° 58' 



9°35'E. 



400-0 !. 



r 



CS 



1 IX 



75° 50' 



15°26'E. 



326-0 » 



r 



S 



5 IX 



71° 60' 



19° 2'E. 



230-0 > 



r 



S 



Plectopliora arachuoides (Clap. & Lachm.) Hkl. In this species I include also 

 Plagiacantha arachnoides (Clap. & Lachm.) Hkl., which represents the young state. The 

 net-work combining the spines is subject to great variation. 



