144 
BULLETIN 125, UNITED STATES NATIONAL MUSEUM. 
linear and deprived of septules. The pseudo-rimule of the peristomice has no 
avicularium as in almost all other species of the genus. This avicularium is gener¬ 
ally placed on the line of the areolar pores and sometimes on the frontal; it is un¬ 
equally developed and almost always triangular on our fossils. The lyrule is very 
small; it is more or less visible according to the development of the lateral lips 
of the peristomice. 
,, . 7ia = 0.08-0. 10 mm. 
Measurements .—Apertura 7 - 
r £a = 0. 08-0. 10 mm. 
Zooecia 
Lz = 0. 36-0. 50 mm. 
Iz = 0. 20-0. 30 mm. 
Occurrence .—Miocene (Duplin marl): Wilmington, North Carolina (common). 
Pliocene (Waccamaw marl): Waccamaw River, Horry County, South Carolina 
(rare). Pliocene (Caloosahatchee marl): Shell Creek, De Soto County (common), 
and Monroe County, Florida (common). Pleistocene: Vero (rare), Simmons Bluff, 
Yonges Island, Charleston County, South Carolina (common), and Daytona, 
Florida (rare.) 
Geological distribution .—Miocene of Australia (Waters); Quaternary of Sicily 
(Neviani). 
Habitat .—Cosmopolitan to a depth of 160 meters. 
Plesiotypes. —Cat. Nos. 68637-68640, U.S.N.M. 
SMITTINA MALEPOSITA, new species. 
Plate 31, figs. 10,11. 
Description .—The zoarium incrusts shells. The zooecia are distinct, separated 
by a salient thread, little elongate, hexagonal, poorly oriented; the frontal is little 
convex and formed of a granular pleurocyst surrounded by a row of areolar pores 
separated by very short costules. The apertura is semilunar with a very short 
proximal lyrule; the peristomie is of little depth and the peristomice is suborbicular. 
The ovicell is large, globular, finely perforated. On the median line of the frontal 
there is a small thin avicularium the beak of which is directed toward the bottom. 
Measurements .—Apertura 
ha = 0. 10 mm. 
la = 0. 10 mm. 
Zooecia 
[Lz — 0. 40 mm. 
i lz = 0. 32 mm. 
Affinities .—-This species is quite close to Smittina trispinosa Johnston, 1838. 
It is distinguished from it by its somewhat larger peristomice and by the place 
of its avicularium, always placed in the vicinity of the median line of the zooecium. 
The position of this avicularium is everywhere rather variable, but its presence 
is constant. There is therefore a group of Smittina in which the avicularium is 
not directly supported on the lyrule. We do not believe that this character should 
be generic, for it does not appear to correspond to an essential and different function. 
Occurrence .—Pliocene (Caloosahatchee marl): Shell Creek, De Soto County, 
Florida (very rare). Pleistocene or Recent: Vero, Florida (rare). 
Cotypes. —Cat. Nos. 68641, 68642, U.S.N.M. 
SMITTINA OPHIDIANA Waters, 1877. 
Plate 3, fig. 3. 
1879. Smittina reticulata, var ophidiana Waters, On the Bryozoa (Polyzoa) of the Bay of Naples, 
Annals and Magazine of Natural History, ser. 5,.vol. 3, p. 40, pi. 9, fig. 1. 
1885. Smittina reticulata, var. ophidiana Waters, On the use of the avicularium mandible in the 
determination of Chilostomatous Bryozoa, Journal Royal Microscopical Society, ser. 2, 
vol. 5, pi. 14, fig. 6. 
