1917.] NATURAL SCIENCES OF PHILADELPHIA. 213 



Alcyna subangulata Pease. PI. XV, figs. 5-7 (varieties). 



1860. Alcyna subangulata Pease, P. Z. S., p. 436. 



1888. Alcyna subangulata Pease, Pilsbry, Man. Conch. X, p. 182, reprint 



of original description. 



This species was described from a specimen sent to H. Cuming, 

 and the type is presumably in the British Museum. A specimen in 

 the Pease collection, Museum of Comparative Zoology, No. 31723, 

 is drawn in figs. 5 and 6. This shell agrees well with Pease's descrip- 

 tion except in color. It is pale pinkish buff with small, pale brownish 

 flames radiating from the suture. The last whorl is obtusely biangu- 

 lar with alwut 4 low spiral cords above the upper angle, two and a 

 very weak third between the angles, base with numerous spirals. 

 There is a rounded swelling or varix behind the lip, stronger than 

 in the other species. The umbilicus is rather large (fig. 5, an ob- 

 liquely basal view). The tooth appears larger in a more oblique 

 view than that drawn. It is a ''dead" shell. 



Length 2.2, diam. 1.7 mm. 



A specimen from Haleiwa, on the west coast of Oahu (Pilsbry, 

 1913) is similar, but with only two cords between the angles, in 

 front, and the color is uniform cartridge buff, probably bleached. 

 Of two from Honolulu, collected by F. Stearns, No. 93890, A. S. N. P., 

 one is bleached white, the other is fresh, whitish with flames of pale 

 flesh color radiating from the suture, wider and more distinct than 

 in the Pease example figured. As this coloration is quite unlike that 

 described by Pease for A. subangulata, the specimens described above 

 may be called A. s. flammulata; No. 93890 being the type. 



Typical A. subangulata was described as "deep red with oblique 

 light red lines." 



Alcyna subangulata virgata, PI. XV, fig. 7, is a somewhat narrower 

 form with three carinse in the middle, two small cords above the 

 upper one, the color flesh pink, becoming old rose at the summit, and 

 elegantly striped with claret brown. As in the other forms, there is 

 a prominent rounded varix behind the outer lip. 



Length 2.1, diam. 1.5 mm. 



Haleiwa, west coast of Oahu, on the beach. Type No. 116297, 

 A. N. S. P., collected by Pilsbry, 1913. 



The tooth recedes, and in an oblique view it is seen to be much 

 longer than shown in the figure. The value of the characters given 

 for these forms of A. subangulata remains to be tested by the com- 

 parison of series of individuals. 



A. subangulata resembles A. lineata, but differs by the much 

 stronger varix behind the outer lip and the coloration. 



