A RKVISION OF I'llR ArSTl.'AMAN TUKIM D.l": — HKI)I-KV. 807 



Reeve. Thus was iudicnted a group, related to J'Jncilharu, of elongate, 

 many whorled shells, aiiiloiin biowii or wliite in colour, the mouth con- 

 tracted by a sharp fiee lip spi-inging from a prominent varix, within 

 which are some entering ridges, and above these a well-cat sinus. 

 Sculpture: — Prominent and continuous longitudinal ribs, crossed by line, 

 and sometimes coarse, spiral grained thi-eads. 



Some West American specues which have been referred to AgathatoDtn 

 Cossmann*^- by Dr. Dall "^ ' have much lesemblance to Pseadorliajihitotiui. 



Misappreliension about tlie type of the genus seems to be general, for 

 I have received from correspondents two diffei-ent species under the name 

 of M. fairbaulii, neither of wliicli agrees with Nevill's tigux'e. So to re- 

 establish this genus I applied to the Director of the Zoological Survey of 

 India for a loan of Nevill's type. This he most generously placed at m^' 

 disposal, and tlie opportunity is n(jw taken to re-describe and to re-figure 

 it. Thus: — 



PSEUDOKHAPUITOMA FAIRBANKl X''rill. 



(Plate li., figs. 127, 128, 129.) 



Shell narrowly conical, solid. Colour uniform cinnamon-drab, except 

 the first two whorls which ai'e hyaline white. Wliorls eigiit, gradually 

 increasing. Sculpture: — The second whorl has a uepionic sculpture of 

 numerous fine radial riblets ; the remainder of the shell is traversed by 

 six prominent stout spaced radial ribs, which ascend the spire verticall}'^ 

 and without interruption. These are crossed by fine and coarse spirals ; 

 the major spirals are ten on the last whorl, four on the penultimate, and 

 three on the previous whorls ; they form polished beads on the crests of 

 the ribs ; between each major spiral run six to eight microscopicallv- 

 beaded threads. Behind the aperture the sutui-e first ascends slightly, 

 then descends abruptly. The final rib, more massive than its fellows, 

 forms a varix in which is excavated a semicircular sinus, and from which 

 an iubent lip contracts the mouth. Witliin the outer lip are four denticules, 

 and on the inner lip is a raised callus pad. Canal short and broad. Length 

 6"2 mm., breadth 2-3 mm. 



Hab. India : — Bombay. 



PSEUDORHAPHITOMA ALTICOS'l'ATA SoverhlJ. 



(Plate li., fig. 130.) 



Mangllid (dtlcdstahi Sowerby, Proc. Malac. Soc, ii., 1896, [). 31, pi. iii., 

 fig. 16. Id. Hedley, Proc. Linn. Soc. N.S.W., xxvi., 1901, p. 17. 

 Id. Verco, Trans. Roy. Soc. S.A., xxxiii., 1909, p. 313. Id. Melvill, 

 Proc. Malac. Soc, xii., 1917, p. 167. 



Hidj. South Australia: — 12 to 15 fathoms, St. Vincents Gulf (type); 

 •iO fathoms, Neptune Island (the shell here figured); -44 fathoms, Cape 



82 Cossmann— Rev. Crit. Pal., iii., 1889, p. 1, new name for Ditoma Bellardi, type 

 Mangilia amjusla Jan. 



s» Dall— Proc, U.S. Nat. Mus., Ivi., 1920, p. 79. 



