246 PROCEEDINGS OF THE ACADEMY OF [May, 



Buccinum mirandum var. schrenkii Verkruzen. (PI. XIX, fi.^'. 6: pi. XX, fig. 6.) 



The example figured occurred with B. mirandum (fig. 5). It differs 

 from that chiefly by the total absence of spiral ribs. The minute 

 sculpture is the same. The whole shell is dull reddish brown, the 

 thick lip and the columella white. The surface is puckered below the 

 suture as in B. mirandum. Length 48, diameter 30 mm. 

 Purpura freycineti alabaster n. subsp. (PI. XX, fig. 2.) 



The shell is large, thick and heavy, dull ashy white externally. The 

 spire is very short, the last whorl ample. Sculpture of coarse, wide- 

 spaced ribs, the largest at the shoulder, regularly diminishing down- 

 wards, about 8 on the last whorl, one on the penultimate, two on the 

 preceding whorls of the spire. There are also some coarse spaced ridges 

 along growth-lines. The aperture is pure white, the bevelled lip a little 

 grooved at the positions of the external ribs. The wide columella is 

 slightly flattened. Siphonal fasciole prominent. Length 56, diameter 

 38 mm. Kunajiri (or Kunashiri), Chishima. Type No. 88,304, A. N. 

 tS. P., from No. 1,591 of Mr. Hirase's collection. 



This large and ponderous Purpura is very imlike the typical P. 

 freycineti, which is a common species of Kamchatka and the Kuril 

 Islands; but it has some resemblance to certain forms of that species 

 figured by Lischke (J. M. C, pi. 4, figs. 16-19), and I have thought it 

 I)est to subordinate alabaster to the common form of the region until 

 extensive collections can demonstrate its true status. 



Explanation of Plates XIX and XX, 



Plate XIX.- — Fig. 1. — Beringius polynematicus n. sp. Type. 

 Fig. 2. — Volutopsius hirasei n. sp. Tj-pe. 



Fig. 3. — Buccinum mirandum Smith. Variety from Akkeslii, Kushiro. 

 Fig. 4. — Buccinum middendorffi Verkruzen. Variety, " " 



Fig. 5. — Buccinum. miranduvi Smith. Strongly ribbed form. 

 Fig. 6. — Buccinum mirandum, schrenkii Verkruzen. 



Plate XX. — Fig. 1. — Buccinum inclytum Pilsbry. Tj^e. 

 Fig. 2. — Purpura freycineti alabaster n. subsp. Type. 

 Fig. 3. — Buccinum mirandum. Akkeshi, Kushiro. 

 Fig. 4. — Buccinum middendorffi Verk. Variety. 

 Fig. 5. — Buccinum mirandum Smith. Strongly ribbed form. 

 Fig. 6. — Buccinum unicum Pilsbry. Type. 



