INVEETEBRATE FAUNA OF LABRADOR. 271 



smoother than in the preceding form. Specimens from Greenland do not differ Long 

 Man Catean Harbor, fifteen fathoms. Are the two forms an instance of Dimorphism T 



I have also specimens on Pecten islandicus from the Newfoundland Bank. 



Mr. Smitt supposes this to be the " Lepralia" stage of Esckara saccaia? 



L. prodUCta Pack. Can. Nat. p. 407, PI. L, fig. 1. 



Cells oval, convex, coarsely punctate; in the young the punctures are emarginate, the 

 base o the ell is produced and wedged in between adjacent ones Aperture broad round 

 wMh a moderately large and deep sinus in the young ; in older cells small round, truncate 

 ^hmdTorI-"hoe shaped; margin full, broad, unarmed, and when the cells are crowded, 

 th ntrTn front expanding upon the base of the cell in front. Cells arranged in hues 

 oon b comb, very irregular: and partially radiating ; forming white, but more generally 

 nur J Pa2 Length ^ of an inch. Old specimens are flattened, granulated, wrth mar- 

 g3f punctes ; ver/rarely the aperture has a small sinus. It » the largest spe.es ob- 



"^t tfeTeTeding species, there are two forms which might easily be mistaken for as 

 manv sp c ef The young ceils are rounded, ovate, depressed and with emargmate pnnct- 

 Tefwhi the apertures tare sinuate. With the other form the species becomes the larg- 

 est of tl^enus yet observed on this coast. The cells are much thickened, convex, in out- 

 fine often pyriform, owing to the elongation of the base of the cell ; and the aperture is 

 small and truncate behind. 



In both forms the surface is more than usually rugose. 



Lepralia trispinosa Johnst. (fide Smitt.) 

 See the remarks under Eschara hbata Lamx ? 



Lepralia Belli Dawsoh. 

 Taken frequently on the Bank in the Straits of Belle Isle. 



Lepralia labiata Stimps. 

 Only one group of this singular species occurred. 



Lepralia lineata Hassell. 



This species was met with but rarely. 



Lepralia globifera Pack. Can. Nat. p. 408. 



Cells large, flat, white, the surface somewhat raised around the small round _ aperture, 

 wlfich has °a slight sinus. Behind the sinus is a minute perforated conical -iculanum 

 Ov cell large, globose, with a few emarginated coarse punctures. Cells in radiating hues 

 ^th rid-s r mning between then, The ovi-capsnles are more crowded in the centre of 

 ^e patch, not being present in the inner cells. Frequent, forming frosty white patches, 

 t often encrusts CeUepora, where the ovi-cells are much crowded, and the ridges between 

 the radiating rows of cells obsolete. I have dredged it m the Bay of Fundy. 



MEMOIRS HOST. SOC. SAT. HIST. Vol. I. Pt. 2. 



