KONGL. SV. Vl'.'l'. AKADKiMIKNS II ANDLINGAR. HAND 34. N:() I. 7 



Oiincnsioiis: (ej)Ii;ilis (l,0J4 long, 0,o4 broad; thorax 0,05 loiio^ and 0,08 inilliin. broad. 

 Found :it "2 1 S. ;Ui W. (1S9S ()ctol)er). Temperature 22. Salinity ,S7,ji. Desmo- 

 plnvktoii. 



Dietjoceplialiis cj iindricus. N. Sp, 



Plate IV. Fis. 10. 



Mouth nut constricted, without peristome. Shell thick-walled, with distinct collar 

 stricture. Length of the two joints 4 : 7, breadth 9:11. Cephalis nearly spherical, large, 

 witli unequal, circular pores, and rough of numerous, short spines. Tliorax cylindrical, 

 with rounded, unequal pores. 



Length nf the shell 0,i millim. 



Found at l.r N. 71 W. (F'ebruary 1898). Temperature 27. Besmo-plankUm. 



This species differs from D. liispidiin Enn. in the cylindrical, not funnel-shaped, 

 tliorax and from D. ohtusus by the spiny cephalis and the unequal pores. 



Dictyoceras iieglectum. N. Sp. 



Plate IV. Fig. 5. 



Shell with two distinct strictures. Length of the three jtMuts 1 : 3,5 : 1,5, breadth 

 1:3:4. Cephalis almost spherical, with a strong horn, nearly twice as long, and small 

 irregular circular pores. Thorax campanulate, with three small triangular lattice wings. 

 Cellules subregular, hexagonal, quincuncially disposed, 2,5 in 0,oi millim., similar on the 

 thorax and abdomen. 



Length of the three joints: 0,o2 : 0,05 : 0,03; breadth 0,02 : 0,oii : 0,08 millim. 



Tropica] Atlantic 11 33"' N. 32 76 W. Mean temperature 25, i. Mean salinity 

 36,04. Desmo-plankton. 



Eupliysetta pusilla. N. Sp. 

 Plate III. Fig. IG. 



Shell egg-shaped, without apical horn; structure double: longitudinal lines 11 in 

 0,01 millim., and very small alveoli, quincuncially arranged, 19 in 0,oi millim. Small feet 

 subulate; odd foot half as long as the shell, not branched. 



Length 0,06; breadth 0,04 millim. 



Very rare at 45 N. 49 W. (January 1899). Temperature 12. Salinity 3.'), 54. 



Halioiniiia echiiiosphfera. N. Sp. 



Plate V. Fig. 5. 



Cortical shell thick-walled, 2l'2 times broader than the medullary shell, with regular, 

 circular, hexagonally framed pores as broad as 1he bars. The outer openings of the pores 

 are sixlobed, lobes ending in short, conical spines. 



