KONGL. 8V. VET. AKADEMIENS HANDLINGAR. HAND 34. v.n I. 7 



Dimensions: cephalis 0,024 long, »»,,,4 broad; thorax 0,os long and 0,08 millim. broad. 

 Found a1 21 S. 36 \Y. (1898 October). Temperature 22. Salinity 37,2i. /)■ mo 

 •plankton. 



Dictyocephalus cylindricus. X. Sp. 



Plate [V. Fig. 10. 



Mouth not constricted, without perisfome. Shell thick-walled, with distinct collar 

 stricture. Length of the two joints 1 : 7, breadth 9: 11. Cephalis nearlj spherical, [arge, 

 with unequal, circular pores, and rough of numerous, short spines. Thorax cylindrical, 

 with rounded, unequal pores. 



Length of the shell 0,i millim. 



Found at 15° N. 71° W. (February 1898). Temperature 27. Desmo-plankton. 



This species differg from I), hispidus Ehb. in lin- cylindrical, nol funnel-shaped, 

 thorax and from D. obtusus by the spiny cephalis and the unequal pores. 



Dictyoceras neglectum. N. Sp. 



Plate IV. Fig. 5. 



Shell with two distinct strictures. Length of the three joints 1 : 3,:. : 1.5. breadth 

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

 irregular circular pores. Thorax canipanulate, with three small triangulär lattice wings. 

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

 thorax and abdomen. 



Length of the three joints: 0,02 : 0,05 : 0,03; breadth 0,02 : 0,06 : 0,08 millim. 



Tropical Atlantic 11°— 33° N. 32°— 76° W. Mean temperature 25, 1. Mean salinity 

 36,04. Desmo-plankton. 



Euphysetta pusilla. N. Sp. 

 Plate III. Fig. 10. 



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

 0,oi 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 35,54. 



Haliomma echiuosphaera. N. Sp. 



Plate V. Fig. 5. 



Cortieal shell thick-walled, 2 1 2 times broader than the medullary shell, with regular, 

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

 are sixlobed, lobes ending in short, conical spines. 



