SULCOCATA. 
215 
3. Sulcocava costulata, Marsson, 1887. 
vSynonymy. 
Sulcocava costulata, Marsson, 1887. Bi-y. Eiig. : Pal. Abh. vol. iv. pt. 1, p. 24^ 
pi. ii. fig. 1. 
Diagnosis. 
Zoarium of stout branches, which are elliptical in transverse 
section. 
Apertures in regular, horizontal, alternate rows on either side 
of a double, unpaired, median row along the middle of the 
obverse face. The bare reverse face is narrow. A large 
depression below the aperture in each zooocium. 
Disteibutiox. 
Senonian — Campanian : Riigen. 
LIST OF SPECIMEXS. 
D. 6296. Two branches (on slide). Mucronatenkreide. Piigen. Laur Coll. 
D. 6297. A single worn branch (on slide). Mucronatenkceide. Eiigeu. 
Laur Coll. 
D. 6295. A branch somewhat twisted. Mucronatenkreide. Eiigen. Laur 
Coll. 
D. 6311-3. Three specimens (on slides). Mucronatenkreide. Eiigen. Laur 
Coll. 
DXEEPPvESEXTED AXD DOUBTFUL SPECIES. 
1. rustica (d’Orbigny), 1853. 
Syn. Laterocava rustica, d’Orbigny, 1853-4. Bry. Cret. p. 1023, pi. 789, 
figs. 13-16. 
,, ,, Pergens, 1890. Eevision, p. 368. 
Char. — Apertures small and very croAvded. On the broad flat side of the 
zoarium they are irregularly (^uincuncial, but on the obverse side they appear 
in alternate horizontal series. 
Distrib. — Senonian : Ste. Colombe, Manche. 
2. sulcata, d’Orbigny, 1853-4. 
Syn. Sulcocava sulcata, d’Orbigny, 1853-4. Bry. Cret. p. 1020, pi. 789, 
figs. 1-3. 
,, ,, Marsson, 1887. Bry. Eiig. : Pal. Abh. vol. iv. p. 23. 
,, ,, Pergens, 1890. Eevision, p. 368. 
,, ,, Pergens, 1893. Bry. St. Pat.: Bull. Soc. beige Geol. 
vol. vi., Pr. Vb. p. 207. 
„ ,, Pergens, 1895. Bry. Cachemb. : iUd. vol. viii. p. 182. 
