REPORT ON THE RADIOLARIA. 1115 



between them a smaller odd middle lobe, and on each side of the latter an ovate frontal lobe. 

 Thorax inflate, twice as long and broad as the cephahs. Pores small, scarce. 



Dimensions. — Length of the shell 0-09, breadth 0'07. 



Habitat. — South Pacific, Station 285, depth 2375 fathoms. 



4. Acrohotrys acuminata, n. sp. (PI. 96, fig. 9). 



Cephalis sexlobate, with two divergent tubes. Occipital and frontal lobes ovate, odd ; between 

 them a cupola-shaped apical lobe, bearing an ascending pointed apical tube. On each side at the 

 base a small buccal lobe, and between the paired buccal lobes an anterior nasal lobe with a descend- 

 ing curved sternal tube. Thorax smaller than the cephalis. Pores numerous and smaU. 



Dimensions. — Length of the shell O'll, breadth 0'09. 



EaMtat. — Central Pacific, Station 272, depth 2600 fathoms. 



5. Acrohotrys auriculata, n. sp. (PL 96, fig. 11). 



Cephalis quadrUobate, with three pointed and auriculate tubes, two ascending apical (an 

 anterior and a posterior) in the helmet-shaped occipital lobe, and a descending sternal tube on the 

 base of the frontal lobe ; between the lobes two lateral paired buccal lobes. Thorax campanulate, 

 twice as broad as the cephalis. Pores rather large and numerous. 



Dimeiisions. — Length of the shell O^l, breadth G'08. 



Habitat. — Central Pacific, Station 271, depth 2425 fathoms. 



6. Acrohotrys trisolenia, n. sp. (PL 96, fig. 8). 



Cephalis quadrilobate, with four odd lobes and three divergent curved tubes, an ascending apical 

 tube in the conical occipital lobe, and two descending tubes on the anterior and posterior basal 

 lobes ; between these three lobes a small central lobe. Thorax ovate, about as large as the cephalis. 

 Pores small and numerous. 



Dimensions. — Length of the shell Oil, breadth 0'05. 



Habitat. — Central Pacific, Station 266, depth 2750 fathoms. 



7. Acrohotrys tetrasolenia, n. sp. 



Cephalis trilobate, with four slender cylindrical tubes. Occcipital lobe helmet-shaped, with an 

 apical tube on the apex and a caudal tube on the base. Two frontal lobes ovate, prolonged into 

 two paired pectoral tubes. The four tubes correspond in position to the four spines of Cortina. 

 Thorax inflate, ovate, larger than the cephalis. Pores very scarce, rather large, irregular. 



Diviensio'ns. — Length of the shell 0-08, breadth 0-05. 



Habitat. — North Pacific, Station 244, depth 2900 fathoms. 



8. Acrohotrys pentasolenia, n. sp. 



Cephalis quinquelobate, with five short conical tubes ; three divergent odd tubes arise from three 

 odd lobes ; an apical from the occipital lobe, a posterior caudal from the suboccipital lobe, and an 



