1905.] 



NATURAL SCIENCES OF PHILADELPHIA. 



293 



Liotia voyi n. sp. 



Shell obliquely trochiform, convexly conic above, flattened below. 

 White. Nucleus lost, 3^ whorls remaining, separated by a deep suture 

 which is regularly bridged across by thin lamellae dividing it into a 

 series of pits; which at the last whorl penetrate through to the umbili- 

 cus. The last whorl is convex above, with two low, obscurely double 

 spiral cords, which are some- 

 what nodose at their intersec- 

 tions with rounded radial ribs. 



At the periphery two thin 

 ecjual keels project, the space 

 between bridged across by thin 

 lamellge (which are continua- 

 tions of the radial ribs), the 



keels rising into spines at the '^ -«i«««:>t- .- ^ ^ 



lamellae. The base is slightly 



convex, roughened by two \JR:7^ 



circles of tubercles, lamellose- 



tuberculate at the edge of the umbilicus. A large spiral cord revolves 

 within the umbilicus; near its lower termination it has a tooth, beyond 

 which it is continuous with the basal lip. The aperture is oblique, 

 circular, the outer lip being expanded in a scalloped varix with five 

 shallow pits on its face. 



Alt. 10, diam. 12.5 mm. 



Flint Island, Polynesia. Types No. 80,916, A. N. S. P., collected by 

 C. D. Voy. 



This large and beautifully sculptured Liotia is related to L. crenata 

 Kiener.^ Compared with specimens of that species in the collection 

 of the Academy, L. voyi is larger and more roughly sculptured, and it 

 wholly lacks the minute sculpture of fine, even strise in the intervals 

 and pits of the coarser sculpture, which is characteristic of Kiener's 

 species. The septa between the peripheral keels are straight in L. voyi, 

 but strongly curved in L. crenata. 



L. crenata was very imperfectly described by Kiener, and his dimen- 

 sions are entirely wrong. It is doubtful whether Reeve's figure, copied 

 by Tryon, represents the true crenata, which is, we think, rather rare. 



Delphintda crenata Kiener, Iconogr. Coq. Viv., p. 11, PI. 4, f. 8. 



