REPORT ON THE RA.DIOLARIA. 1121 



2. Botryocyrtis theocampe, n. sp. (PI. 96, fig. 19). 



Cephalis quadrilobate ; the odd frontal and the two paired buccal lobes hemispherical, about 

 half as large as the helmet-shaped occipital lobe. Thorax cylindrical, of equal length and breadth, 

 oue and a half times as broad as the cephalis and as the cylindrical abdomen. Pores rather large, 

 irregular, roundish. 



Dmiensions. — Length of the shell 0"12, breadth 0-06. 



Habitat. — Central Pacific, Station 274, depth 2750 fathoms. 



3. Botryocyrtis cerebellum, n. sp. (PI. 96, fig. 18). 



Cephalis quiuquelobate ; the odd frontal and the two paired buccal lobes ovate, about half as 

 large as the two helmet-shaped paired occipital lobes (?). Thorax campanulate, twice as broad and 

 long as the cephalis and as the truncate cylindrical abdomen. 



Dimensions. — ^Length of the shell 012, breadth 0'08. 



Habitat. — South Atlantic, Station 332, depth 2200 fathoms. 



4. Botryocyrtis quinaria, Ehrenberg. 



Botryocyrtis quinaria, Ehrenberg, 1872, Abhandl. d. k. Akad. d. Wiss. Berlin, p. 287, Taf. x. 

 fig. 16. 



Cephalis quinquelobate ; the odd occipital lobe ovate, twice as large as each of the other four 

 subsphericnl lobes, the two anterior (or frontal) of which are somewhat smaller than the two 

 posterior (or buccal). Thorax campanulate, somewhat larger than the truncate abdomen. Pores 

 rather large, irregidar. 



Dimensions. — Length of the shell 0'09, breadth 0'05. 



Habitat. — Indian Ocean (Zanzibar and Madagascar), surface. 



Genus 493. Pylobotrys,^ Haeckel, 1881, Prodromus, p. 440. 



Definition. — P y 1 o b o t r y i d a with tubes on the cephalis, and with the mouth of 

 the abdomen open. 



The genus Pylohotrys differs from the closely allied Acrobotrys, its ancestral form, 

 in the development of an abdomen or a third shell -joint, the basal mouth of which 

 remains open. 



1. Pylobotrys putealis, n. sp. (PI. 96, fig. 21). 



Cephalis multilobate, with a single curved and descending tube on the base of its anterior 

 part (sternal tube). Occipital half of the cephalis di\'ided into three large odd lobes (the largest 



'■ Pi/to6oiri/s= Grape with an aperture ; •n/Aii, liiri^v;. 

 (ZOOL. CHALL. EXP. PART XI.. — 1880.) Er 141 



