88 BULa:.ETix 125, united states national museum. 



This species lives mainly in the temperate and frigid regions and does not 

 approach the Tropics. Its presence in the Miocene at Cove Point, Maryland, where 

 it was described as Lepralia marylandica by Ulrich and Bassler, is very remarkable 

 and would indicate the existence of a very cold boreal current. 



Occurrence. — Miocene (St. Mary's formation) : Cove Point, Maryland (rare) . 



Geological distribution. — Pliocene and Quaternary of Austria-Himgary (Busk, 

 Bell) and of Italy (Seguenza). 



Habitat. — Arctic Ocean: Jean Mayen (140-180 meters), Franz Joseph Land 

 (210 meters) ; Sea of Kara; North Sea; Norway; Germany; Denmark (9-25 meters). 

 Eastern Atlantic off England in the English Channel, in the Gulf of Gascony. 

 Mediterranean (57-77 meters) and Adriatic. Madeira Islands. Western Atlantic 

 from the St. Laurence to the Woods Hole Region. 



Plesiotype. — Cat. No. 68519, U.S.N.M. (Holotype of Lepralia marylandica 

 Ulrich and Bassler.) 



CRIBRILINA LIGULATA. new species. 



Plate 15, fig. 14. 



Description. — The zoarium is encrusting a Pecten. The zooecia are distinct, 



separated by a deep furrow, elongated, regularly elliptical; the frontal is convex 



and bears 15 narrow, little salient costules; the lacunae are rectangular and larger 



on the margin than on the median zooecial axis. The apertura is large, tranverse, 



semilunar but with a concave proximal border; the peristome is wide, smooth, little 



salient; it bears four spines which can be transformed into two or three tongues 



by coalescence. The ancestrula is membraniporoid. 



Ttr J * i. \ba = Q.\Q vam.. „ . fi2 = 0.50mm. 



Measwremente.— Apertura , .,„ Zooecia , "o<^,.no 



^ lZa = 0.12mm. [ fe = 0.30-0.32 mm. 



Affinities. — In its exterior aspect this species much resembles Lepralia man- 

 zonii Reuss, 1874, from the Tortonian of Austria-Hungary, but it differs in the pres- 

 ence of its liguhform spines. Normally there are only four large spines, but they 

 become thickened easily and joined together to form two or three very salient 

 tonguelike plates. 



Occurrence. — ^Miocene (Calvert formation): 1 mile south of Parkers Creek, 

 Calvert Coimty, Maryland (very rare). 



Holotype.— Cat. No. 68520, U.S.N.M. 



CRIBRILINA CUSPIDATA, new species. 



Plate 15, fig. 15. 



Description. — The zoarium incrusts shells. The zooecia are distmct, separated 

 by a deep furrow, large, elongate; the frontal is very convex; it is surrounded by 

 a line of small lacunae and ornamented with 5 or 6 large lacunae in the form of a 

 crescent. The lumen is not visible. The apertura is semilunar; the anter is very • 

 large and the poster is concave. The ovicell is hyperstomial. Between the zoo- 

 ecia are large triangular avicularia in the form of the head of a lance; the beak is 

 rounded and turned toward the top. 



Measurements.-Apevtuval^;^ =^-'^ """• Zooecial^^ = ^'^'^ ""^■ 



I7rt = 0.20mm. 1^2 = 0.35-0.50 mm. 



