354] PROCEEDINGS OF THE ACADEMY OF [April, 



subspecies domingensis Gabb by having more numerous spiral threads 

 in the intervals of the major spirals — three or four in each interval. 

 There are six varices on the last one and a half whorls, none on the 

 earlier whorls. The varices are not very large, and not excavated 

 behind. A shoulder spine is present on the last two varices only, 

 and is short and conic. The three intervariceal spaces on the last 

 whorl bear three, two and one folds, respectively. These folds are 

 shorter and higher than in recurvirostris . Diameter 38 mm. ; length 

 unknown, the anterior canal being broken. 



Murex (Phyllonotus) gatunensis. PI. XXVI, fig. 2. 



The shell resembles M. spinulosa in general form. Embryonic 

 whorls unknown; subsequent whorls about 6, strongly convex, 

 subangular at the shoulder, the last contracted into a narrow but 

 short anterior canal. Sculpture : on the last whorl seven strong varices, 

 each with a short horizontal spine at the shoulder and about half as 

 wide as the intervals; sharp, narrow, unequal spiral ridges over both 

 varices and intervals. These ridges are unequally spaced, and the 

 concave interstices bear numerous weak spiral strise. On the penulti- 

 mate whorl, two ridges are visible below, and two or three above the 

 shoulder-angle. The aperture is triangular-ovate; outer lip has 11 or 

 12 short, acute teeth on the submarginal internal callus. 



Length about 32 or 33 mm. (early whorls wanting), diam. 21 mm. 



This species has much resemblance to Murex spinulosa Heilprin, but 

 it differs, among other characters, by wanting a basal series of spines. 



Typhis alatus Sowerby. 



Typhis alatus Sowerby, Journ. Geol. Soc. Lond., VI, p. 48, PI. 10, fig. 4. 



Similar to specimens from the Oligocene of Bowden and Santo 

 Domingo. Typhis martyria Dall is a recent survivor of the same group, 

 in the Pacific. 



A specimen was lost, which so far as we can remember was probably 

 Typhis obesus Gabb. 



Typhis gabbi n. sp. PI. XXVI, fig. 6. 



The shell is fusiform, strong, the last whorl having a peculiar sculp- 

 ture, the surface shrivelled, wrinkled and pitted. The embryo, of 

 nearly two very convex smooth whorls, forms a short style or pillar. 

 Then the diameter enlarges, and a shoulder- angle appears on the 

 latter part of the third whorl. In the middle of the fourth whoil 

 varices and intervariceal tubes appear on the very prominent shoulder, 

 these structures gradually increasing in size to the last whorl, which 

 bears four varices. These are strong and heavy, rounded, somewhat 



