CTENOPHORES OF THE ATLANTIC COAST OF NORTH AMERICA i< 



Tinerfe lactea sp. nov. (Fig. 9, plate 3.) 



Body oval, 9 mm. long, 5 mm. wide in the funnel-plane, and 3 mm. 

 wide in the stomach-plane. The apical sense-capsule is raised above the 

 general body-surface and is covered with bristles. It is flanked on both 

 sides in the tentacular-diameter by 2 prominently projecting, mammi- 

 form, gelatinous papillae. The 8 rows of combs are of equal length and 

 extend from very near the apical sense-organ to the middle of the sides 

 of the body. Each row consists of about 25 combs. The 8 meridional 

 canals extend beyond the lower ends of the rows of combs and taper to 

 simple, pointed ends near the mouth, the 4 sub tentacular vessels being 

 slightly longer than the 4 subventral. All of these canals widen laterally 

 below the lower ends of the rows of combs, and their lower ends are filled 

 with genital products. The funnel-tube is wide and fiat, and lyre-shaped 

 in outline. The stomodaeum is well developed and there are 2 narrow, 

 lateral, paragastric canals in the tentacular diameter. The tentacle 

 bases are long and pressed closely against the sides of the paragastric 

 canals. The wide tentacle-sheaths proceed straight outward, opening 

 at the middle points of the sides of the body. The 2 long, tapering ten- 

 tacles have each a few simple, filamentous side-branches. 



When mature the eggs are cast out through the side walls of the 8 

 meridional canals. The animal is very active. The body is milky and 

 translucent. It is a rare ctenophore and I have seen only 3 specimens, 

 all found in July, near the surface, about 4 miles from land off Tortugas 

 Islands, Florida. 



Tinerfe beehleri sp. nov. (Figs. 10 and 11, plate 3.) 



Named in honor of Commodore William H. Beehler, U. S. N., 

 formerly commandant at Key West; for many years the most constant, 

 kindly, and powerful friend of the Tortugas Laboratory of the Carnegie 

 Institution of Washington. 



Body nearly cylindrical, 9 mm. long and 4.2 mm. wide, with only 

 slight compression in the stomodaeal-axis. It is difficult to determine 

 the amount of this compression, however, for the shape of the animal 

 almost constantly changes through vermiform contractions of the body- 

 wall. Indeed, these movements seem to aid in some measure in enabling 

 the creature to swim. At times the aboral pole is evenly rotmded and 

 dome-like, while at others contractions cause 8 motmds to project above 

 the apical sense-organ, as is shown in fig. 10, plate 3. The sense-capsule 

 is simple and not simken within a furrow, but on both sides of it in the 

 fimnel-axis there are papilliform swellings. The 8 rows of ciHary combs 

 are less than half as long as the body and are all of equal length. Each 

 row consists of about 15 combs. They are widely separated from the 

 apical sense-organ. 



The stomodaeum is well developed and laterally flattened. The 

 fimnel is large, but the axial funnel-tube is very short and is cleft for 

 about half its length by the basal part of the sensory cushion of the 

 lithocyst-plate. The interradial and adradial canals extend from the 

 aboral ends of the rows of cilia to near the level of the mouth. These 



