204 TORNATELLIDES, HAWAIIAN ISLANDS. 



species of Tornatellides, probably a form related to T. pro- 

 cerula Anc. No specimens so labeled can be found in the 

 Pease collection, and in the absence of a recognizable descrip- 

 tion the species must be discarded. The account applies 

 equally well to several species. 



10. T. COMPACTUS (Sykes). PL 45, figs. 1, 2, 3. 



"Shell perforate, ovate, brownish-corneous, a little shining, 

 thin. Spire short, the apex rather obtuse. Whorls 5 to 5%* 

 well marked with growth-lines, a little convex, regularly and 

 slowly increasing, the suture well impressed. Aperture ovate- 

 piriform, often provided with a single minute lamella. Peri- 

 stome simple, the columellar margin reflexed and expanded. 

 Length 2.2, diam. 1.2 mm." (Sykes). 



Hawaii: Mauna Loa at 2,000 ft. on hilo grass (Perkins), 

 Hilo (Thaanum, Cooke), Kaiwiki (Thaanum), Hamakua (An- 

 cey), Kapua district of Kona (Forbes). Type in British Mu- 

 seum, cotypes no. 13993 Bishop Museum. 



Tornatettina compacta SYKES, Faun. Haw., ii, Moll., p. 380, 

 pi. 11, f. 1 (1900). HENSHAW, Journ. of Malacology, xi, 

 1904, p. 64. ANCEY, t. c., p. 70. 



"A compressed, compact little form, the aperture measur- 

 ing about two-fifths of the length. The whorls are somewhat 

 con vex " (Sykes). 



One of the cotypes, received from Sykes, has 4/ 2 whorls. 

 It measures: length 2.15, diam. 1.5, axis of aperture 1.1 mm. 

 Shells from Kapua, though slightly darker brown, are iden- 

 tical with the typical form. An adult specimen (pi. 45, fig. 

 1) has 4% whorls. The embryonic whorls, as is also the case 

 of the typical form, are not spirally striate. The suture of 

 the embryonic shell is remarkably deep for a Tornatellides. 

 The transverse striae of the postembryonic whorls are almost 

 regular and between them are numerous very fine striae. An 

 adult specimen with 4% whorls measures : length 2.15, diam. 

 1.4, axis of apert. 1.0, par. lam. 0.04, umb. 0.43 mm. 



In an immature shell with 4 whorls the columella is fur- 

 nished with a minute, somewhat oblique, deeply-seated lower 

 fold (fig. 3). 



