128 THE NAUTILUS. 



Eulima gracilis Ads. Spirula austral is Lam. 



Gastrochsena ovata Sby. Teilina prom era Dall. 



(Fig. 20.) Teilina sijbaritlca Dall. 



Litiopa bombyx Kein. 



Vermetns erectus Dall. Tliis shell is quite common, but generally 

 has the erect portion broken off, as in Fig. 19. 



The following are undoubtedly new forms. Cotypes of each are 

 deposited (with the Melampus and Siphonaria) in the museums at 

 Washington, Philadelphia, Boston and Providence. 



Gastrochxna moiobrayi sp. n. (Fig. "21 ). 



This has often been mistaken for a juvenile G. ovata, (Fig. 20) as 

 it resembles ovata in shape and color, but neither in size, nor habitat. 

 In Bermuda G. ovata has an alt. of -20 mm. and bores a hole about 

 10 mm. in diameter in the solid brain-corals, or shell-rock. 



On the other hand, G. mowbrayi is found in the dead or dying steins 

 of the branch coral (^Oculina) the entire stem of which could be put 

 into a tube of ovata. G. mowbrayi occupies a cavity a little larger 

 than the shell (which is about 6x3 mm., the cut showing an ex- 

 tremely large specimen) with a small opening to the outer surface of 

 the coral. These shells are often grouped so closely together, as to 

 undermine the strength of the coral, (see Fig. 22). Locality, Har- 

 rington Sound, dredged in 20 to 40 ft. Named in honor of Mr. 

 Lewis Mowbray an enthusiastic Bermudian naturalist. 



Teilina Isevigata Linn., var. Stella n. v. 



T. Isevigata is called the " sunset shell" by the natives, and it 

 well deserves the name on account of its beautiful bands of orange 

 or pink alternating with delicate yellow tints. About one out of 

 twenty of these shells has diverging, radial pink rays (like I. 

 radiata). For this nameless variety I propose the name stella 

 (Fig. 34) collected at Flatt's Inlet. 



Volvaria avena Lam., var. soutkwicki n. v. 



Volvaria avena (Fig. 23) is common along the north shore of 

 Bermuda, and is widely known and easily recognized by its con- 

 spicuous transverse orange bands, size 9x3 mm. 



On Hamilton Beach I found a smaller constant variety (Fig. 24) 

 which had a uniformly dark, mottled ground with no bands of color. 

 Alt. 6x2 mm. This variety is named after my friend, Mr. Jas. 



