328 Prof. Bailey on Fossil and Recent Infusoria. 



renberg's descriptions of which I have added a few remarks, with 

 references to outline sketches drawn by myself. 



1. '■'■ Ch<Btoceros7 Bacillaria. (Fig. 18.) — Testula Bacillari ter qua- 

 terve latiore quam alta in utroque fine truncata et cornibus duobus me- 

 diis longis filiformibus instructa. Diam. ^V" } Bermuda." Ehr. I. c. 

 p. 18. 



2. ^^ Chcelocej'os ? Diploneis. (Fig. 19.) — Testula media constricta 

 utroque fine rotundato, habitu Diploneidis cornibus filiformibus in utro- 

 que fine mediis, Diam. -g^^'" sine cornibus. Bermuda. 



" Utramque formam Prof. Bailey primus observavit et delineavit. Ch. 

 Bacillarium ipse non vidi, altera in comissa terra mihi quoque obviam 

 facta est. Chsetocerotes e mari australi petiti eeque lati ac longi, aut 

 longiores quam lati sunt et catenatim vivunt, cornibus decies et ultra 

 longioribus." Ehr. I. c. p. 18. 



I now feel confident that these two supposed species are only 

 different positions of the same species. I have seen as many as 

 15 to 20 individuals in the Bermuda Tripoli, and have sometimes 

 succeeded, by means of Chevalier's compressor, in turning them 

 over so as to observe the two sides of the same individual, and 

 have thus ascertained that these two sides differ in outline, as 

 shown in figs. 18 and 19, and I would therefore retain for the 

 species the name C. Diploneis. 



3. " Denticella 7 polymera. (Fig. 20.) — Testulse latissimss brevisque 

 septis lobisque lateralibus in adultu 10 (-12), granulis in lobi medii facie 

 anteriore 6 majoribus stellam formantibus (denticulis setaceis laterali- 

 bus extra medium positis) aperturarum tubulis longe exsertis. Latit. 

 Y^j-'". Bermuda. 



" Fragmentum vidi sells expers, hinc Biddulphise generi banc formam 

 adscripsissem, sed Prof. Bailey in icone missa unius lateris setam de- 

 lineavit. Denticellce tridentata; statum eximie adultum banc formam 

 referre non censeo quoniam lobi novfe majorisque formse depressiores 

 sunt. Lobos 10 ipse observavi 12 Bailey delineavit." Ehr. I. c. p. 19. 



This form appears to be rather rare ; a copy of the outline which 

 I sent to Ehrenberg is given in fig. 20. 



4. " Dictyocha Poniimlus. (Fig. 21.) — Lanceolata oblonga, arcu me- 

 dio transverse simplici in duas cellulas divisa margine inermi. Diam. 

 ■Jg"'. Bermuda. 



5. " Dictyocha Quadratum. (Fig. 22.) — Quadrata aut subquadrata 

 oblonga, arcu medio transverso simplici in duas cellulas divisa spina in 

 utroque latere angustiore medio singula. Diam. -^\j"'. Bermuda. 



