330 



Locality. — Type from 110 fathoms off Beachport, with 3 

 others very good ; in 55 fathoms off Cape Borda, 3 good ; in 

 200 fathoms off Beachport, 1 good. 



It is much more attenuate than M. alha, Petterd, and 

 has only the one sujDrasutural row of spots. It may possibly 

 be an extreme variant. 



Mitromorpha incerta, Pritchard and Gatlii}'. 



Manqilia incerta, Pritchard and Gatliflf, Proc. Eoy. Soc, 

 Victoria. 1902, vol. xiv. (N.S.), part 2, p. 181, pi. ix., fig. 1 

 (rather poor); ibid, op. cit., 1906, vol. xviii., p. 50, "Western 

 Port.'" 



To the author's definition I may add that the protoconch 

 is conical, of three whorls, subconvex, suture shallow, whorls 

 minutely granulated in spiral rows, fifteen in the third whorl. 

 The length is 4'1 mm. ; of the body-whorl, 2'8 mm. ; and 

 breadth, 16 mm. 



Dredged in Gulf St. Vincent and Backstairs Passage, 

 depth not noted, 17 fresh and dead; in 15 to 20 fathoms off 

 St. Francis Island, 2 very j^oor ; in 35 fathoms, 2 poor; in 

 62 fathoms north-west of Cape Borda, 1 good and 3 poor ; 

 in 90 fathoms off Cape Jaffa, 1 poor; in 104 fathoms off Nep- 

 tune Islands, 1 poor. 



I have called it a Mitromorjyha rather than a Mangilia, 

 although it has no visible labial nodules or plaits, because it 

 seems very closely allied to M . alha, var. axiscalpta, above 

 described. 



Mitromorpha axicostata, n. sp. PI. xxviii., lig. 4. 



Shell solid, elongate-oval, of 6 whorls, including the 

 pointed protoconch of 2-^ smooth convex whorls. Spire- whorls 

 slightly convex. Suture simple, margined by a flat, narrow 

 band. Base moderately contracted. Aperture elongate-oval, 

 slightly constricted into a short, open canal. Outer lip thin, 

 simple, convex in profile, with a shallow, wide depression just 

 belowi the ascending suture. Inner lip complete, an applied 

 thin glaze, callous at the suture. Columella long, nearly 

 straight, slightly prominent at junction with concave base of 

 body-whoi-l. No definite jDlait. Oblique rounded axial costse, 

 as wide as the interspaces, absent from the base, and vanish- 

 ing towards the aperture. Spiral lii'se flatly convex, wider 

 than their spaces, cross the ribs, nine in the penultimate, 

 twenty-five in the body-whorl. 



Dim. — Length, 4'9 mm.; of the body-whorl, 2"4 mm. ; 

 breadth, 2"1 mm. 



Localifii. — Type from 104 fathoms 35 miles south-west 



