^RT. 14 FOSSIL AND RECEN-T BEYOZOA CANU AND BASSLER 59 



we have never observed onychocellaria. This absence of adventitious 

 organs appears to indicate a genus which is commensal in the great 

 marine currents. 



FLORIDINELLA TYPICA, new species 



Plate 6, Figures 6, 7; text Figure 8& 



Description. — The zoarium encrusts shells and nullipores. The 

 zooecia are distinct, separated by a furrow, irregularly oval, some- 

 what elongated; the mural rim is very thin, smooth, salient, com- 

 plete; the cryptocyst is shallow, flat, granulated. The opesium is 

 large, subtrifoliated ; the proximal border is concave or convex with 

 very small opesiular indentations; the two lateral condyles are small 

 and deep. The ovicell is endozooecial, small, little salient. There 

 are frequently small interzooecial tuberosities. 



Measurements. — Opercular valvc) , ^\ , ^ 



^ Ua = 0.14 mm. 



ry . iLz = 0.50 mm. 

 Zooeciai, _ .. 



Us = 0.40 mm. 



Variations. — This species is very irregular in its micrometric meas- 

 nrements, but its general aspect is rather constant. The two lateral 

 condyles on which the opercular valve is supported are not always 

 very apparent, for they are deeply located and attached to the infe- 

 rior part of the mural rim. The small interzooecial tuberosities, 

 although sporadic, are very characteristic. The opesiular indenta- 

 tions are not always visible, for the proximal border of the opesium 

 is often concave. 



This species is not so beautiful, so vigorous, or so characteristic as 

 the fossil genotype, Floridinella vickshurgica, but as it is the only 

 recent species to be procured in abundance we have chosen it as the 

 recent type of the genus. 



Biology. — Our living specimens were ovicelled. 



Occurrence. — Albatross Station D. 2639, Straits of Florida; 25° 04 

 60'' N.; 80° 15' 10" W.; 56 fms.; coral sand. 

 Fowey Light, 15 miles south of Miami, Fla.; 40 fms. 



Cotypes.—Ceit. No. 7497, U.S.N.M. 



FLORIDINELLA PABVULA, new species 



Plate 6, Figure 8 



Description. — The zoarium encrusts nulhpores and gastropod mol- 

 lusks. The zooecia are small, distinct, separated by a deep furrow, 

 oval, short; the mural rim is thin, small salient, much attenuated proxi- 

 mally; the cryptocyst is short, flat, shallow. The opesium is oval, 

 elongated, trifoliate; the two lateral condyles are salient; the proxi- 

 mal border is convex with two irregular opesiular indentations. The 



