ART. 13 BRYOZOAN FAUNA CANU AND BASSLER 29 



ecuted in different ways on each cell, we must suppose that they are 

 zooecial and not zoarial; they are useful only to the zooecia which 

 bear them. We found only a single living specimen with ectocyst 

 and ovicell at station D. 2815. The species was in reproduction 

 April 9, 1888. 



Occurrence. — Galapagos Islands, D. 2813 and D. 2815. 



Plesioty pes. —Cfit. Nos. 8498, 8499, U.S.N.M. 



Genus CODONELLA, new genus 



Greek, co(Zon= bell, referring to the form of the operculum 



Smittinidae in which the ovicell is hyperstomial, closed by the 

 operculum, porous and marginated. The frontal is a tremocyst. A 

 median avicularium is placed be- 

 fore the aperture. The peristome 

 is salient and complete. The ap- 

 erture is suborbicular with a very " C 



, ,1 • J. • Figure 7. — Codonella granclata. new 



concave poster; the peristomice genus and species, three forms of 

 bears two false cardelles, limit- opercula, x 85 

 ing laterally a broad rounded sinus. There are oral glands and 15 

 to 17 tentacles. 



Genotype. — Codonella (Lepralia) galeata, Busk, 1852. 



The species appearing to belong to this genus are : 



Codonella (Lepralia) galeata Busk, 1852 Antarctic. 



Codonella {Lepralia) obtusata Ortman, 1890 Japan. 



Codonella (Lepralia) acuta Ortman, 1890 Japan. 



Codonella (Schizoporella) peUucida Ortman, 1890 Japan. 



Codonella (Porella) cribriformis O'Donoghue, 1923 Vancouver. 



Codonella (Lepralia) pachnoides MacGillivray, 1886 Australia. 



Codonella (Lepralia) montferrandi Audouin, 1826 Red Sea. 



Codonella, species Hawaii. 



Exteriorly, in the form of the visible aperture (or peristomice) this 

 genus resembles ScMzomavella very much. In the fossils it would be 

 almost impossible to note the difference, for only the preparation of 

 the operculum permits the recognition of the true form of the 

 aperture. 



The difference from Porella is slight and consists only in the form 

 of the operculum and the peristomice. 



CODONELLA GRANULATA, new species 

 Plate 4, Figures 6-8 



Description. — The zoarium incrusts shells, nullipores, and bryozoa. 

 The zooecia are distinct, separated by a deep furrow, elongated, 

 elliptical ; the frontal is quite convex and formed of a very granular 



