REPORT ON THE RADIOLARIA. 1661 



1. Entocannula circularis, n. sp. 



Shell circular or nearly circular, lenticular, strongly compressed. Pharynx cylindrical, one- 

 third or one-fourth as broad as the shell, twice as broad as long, its outer and inner apertures of 

 equal breadth. Surface smooth. 



Dimensions. Diameter of the shell 0'20 to 0'32, of the pharynx 0'07 to 0'09. 



Habitat. North Pacific, Station 250, depth 3050 fathoms. 



2. Entocannula subglobosa, n. sp. 



Challengeria bromleyi, (partim), John Murray, 1879, in scliedulis Chall. Coll. 



Shell circular, nearly spherical, slightly compressed. Pharynx funnel-shaped, truncate, conical, 

 its outer opening twice as broad as the inner. Surface smooth. 

 Dimensions. Diameter of the shell 0'25 to 0'28, of the inner mouth 0'05. 

 Habitat. South Pacific, Station 289, depth 2550 fathoms. 



3. Entocannula infundibulum, n. sp. (PI. 99, fig. 19). 



Challengeria bromleyi (partim), John Murray, 1879, in litteris, Narr. Chall Exp., vol. i. p. 226, 

 pi. A, fig. 5. 



Shell ovate, truncate at the mouth, slightly compressed. Pharynx funnel-shaped, its outer 

 aperture two to three times as broad as the inner. Surface smooth. 



Dimensions. Length of the shell 0'22 to 0'28, breadth 0'2 to 0'25 ; inner mouth 0'04 to 0'08. 

 Habitat. South Atlantic, Station 318, depth 2040 fathoms. 



4. Entocannula hirsuta, n. sp. (PI. 99, fig. 20). 



Tricliogromia hirsuta, Haeckel, 1881, Manuscript. 



Shell ovate. Pharynx cylindrical, one-fourth as broad as the shell, its inner and outer 

 apertures of equal breadth. The whole surface of the shell, and mainly the outer mouth, is densely 

 covered with thin, curved, siliceous bristles. 



Dimensions. Length of the shell 0'27 to 0'36, breadth 0'2 to 0'3 ; mouth 0'05 to 0'08. 



Habitat. North Atlantic, Fseroe Channel (Gulf Stream), John Murray, depth 600 fathoms. 



Genus 697. Pharyngella, 1 n. gen. 



Definition. Ch alle ngerida with a pharynx, and with one or more teeth on 

 the mouth, but without marginal spines. 



The genus Pharyngella differs from the preceding Entocannula, its ancestral form, 

 in the development of one or more teeth on the peristome, and exhibits therefore the 

 same relation to it that Challengeria bears to Lithogromia. Only a few species of this 

 genus have been observed, all in the Atlantic. 



1 Pharyngella = Shell with an internal pharynx. 



