HELIX-PAPUINA. 35 



H. GRATA Michelin. P. 13, figs. 50, 51. 



Narrowly, obliquely perforated, pyramidal, acutely keeled in the 

 middle ; yellow, with a brown band above the keel and a wider one 

 below it. 



The shell is solid, with oblique delicate growth lines, and on the 

 base microscopic spiral lines. The pyramidal spire is composed of 4| 

 whorls, the earlier two shining, convex. Last whorl having an 

 acute, compressed white peripheral carina ; base convex ; whorl not 

 descending below the keel in front. Aperture oblique, sub-rhom- 

 boidal. Peristome yellow, broadly expanded, dilated at the colu- 

 mella into a wide vertical plate. Alt. 18, diam. 23 mill. 



Port Dorey, New Guinea; Island of Sorong, Mansinam and Jobi. 



Carocolla grata MICH., in Guerins' Mag. de Zool. 1831, t. 9. 

 Helix grata FEE. et DESK., Hist, i, p. 335, t. 63B, f. 1, 2. PFR. 

 Monogr. i, p. 325 ; Conch. Cab. p. 356, t. 136, f. 7, 8. DOHRN in 

 Contin. Conch. Cab. p. 595, t. 174, f. 12, 13. TAP.-CAN., Ann. 

 Mus. Civ. Genov. xix, p. 117, t. 6, f. 7 ; t. 8, f. 4, 10. Anatomy. 

 Helix acuta Q. & G., Voy. Astrol., Zool. ii, p. 98, t. 8, f. 1-4 (not of 

 Lamarck). 



The sulphur-yellow and brown coloration of this species is 

 peculiar. It is variable in size and degree of depression. 



H. PELECHYSTOMA Tapparone Canefri. PI. 12, figs. 28, 29, 30. 

 Shell narrowly umbilicated, depressed trochiform, most acutely 

 >mpressed-carinated, irregularly obliquely striated, under a lens 

 seen to be minutely granulated ; corneous- whitish, covered with a 

 pale and deciduous epidermis. Spire depressed-conoid, rather acute. 

 Whorls 5 or 51, nearly flat, separated by marginulated sutures; last 

 whorl deflexed in front, the base convex, radiately striated. Aperture 

 )blique, depressed, ax-shaped ; peristome a little expanded, beaked 

 at the carina ; upper margin nearly straight, moderately reflexed, 

 basal margin regularly arcuate, well reflexed ; columella simple, 

 dilated, nearly closing the narrow umbilicus. Alt. 11, greater diam. 

 25*, lesser 22 mill. (Tapp. Can.) 



Pulo Faor, New Guinea. 



H. pelechystoma T. C., Ann. Mus. Civ. Genov. xix, p. 120, t. 2, f. 

 21-23, 1883. 



Intermediate between H. vitrea and H. carinata. It is more de- 

 pressed than the former, the aperture more oblique, columella nar- 



