356 PROCEEDINGS OF THE ACADEMY OF [April, 



AQUILLID^. 

 Distorsio gatunensis Toula. PI. XXVI, fig. 8. 



Distorsio (Distortrix, Persona) gatunensis Tonla,, Jahrb., p. 700, PI. 25, fig. 10. 

 This fine species is well-distinguished from Antillean Oligocene and 

 recent forms by the larger size of its low, naticoid, embryonic shell 

 of 3^ whorls, set somewhat aslant upon the sculptured portion fol- 

 lowing. It measures 2.25 mm. in diameter. The adult shell figured 

 is 49 mm. long, with 6^- post-embryonic whorls. 



Malea camura Guppy. 



Malea ringens Conrad, Pacific R. R. Reports, VI, p. 72. PI. 5, fig. 22 (Gatun.) 

 Malea camura Guppy, Journ. Geol. Soc. Lond., XXIII, p. 287, PI. 17, fig. 0. 



Several specimens, none perfect, are perhaps referable to this Jamai- 

 can and Santo Domingan species, which was described from an imperfect 

 example of the small phase, having about 16 spiral ribs. The Gatun 

 shells are much larger, length about 80 mm., have a longer spire than 

 usual in M. camura, and about the same number of ribs. Conrad has 

 given a figure of the Gatun form, showing the characteristic high spire. 



Sconsia laevigata (Sowb.). 



Cassidaria laevigata Sowb., Journ. Geol. Soc, Lond., VI, p. 47, pi. 10, fig. 2. 



An internal cast and an imperfect shell broken from a hard matrix 

 evidently belong to this species. They are somewhat more oval, less 

 inflated above, than the largest examples from Santo Domingo. 



Pyrula near papyratia Say. 



A broken internal cast was found at Gatun, which shows no characters 

 inconsistent with the recent species, yet is not perfect enough for 

 positive identification. 



CYPR^JIDiE. 

 Cypraea henikeni Sowb., var. PI. XXVI, figs. 9, 10 



Cypr&a henkeri Sowb., Journ. Geol. Soc. Lond., VI, p. 45, PI. 9, fig. 3. 

 The typical C. henikeni from Santo Domingo has two well-developed 

 callous tubercles on the posterior part of the back, but in some shells 

 these are low or wanting. The sides, posteriorly, are sometimes coarsely 

 corrugated. In the specimens from Gatun there is no trace of the 

 dorsal nodes; the callus has several corrugations on each side of the 

 posterior canal, and lower ones may be felt along the sides. The 

 aperture is like that of Santo Domingo C. henikeni, except that the 

 teeth are more compressed and longer. In a specimen 42.5 mm. long 

 there are 15 teeth on the inner, 19 on the outer lip. Specimens retain- 

 ing part of the color are ochraceous with orange streaks, arranged as 

 in the recent C. mus. 



