1920.] 



NATURAL SCIENCES OF PHILADELPHIA. 



371 



2. Large, with manj'' brown spiral lines ; coluinellar reflection lunate, 

 not appressed; spire level, of 3)^ whorls parted by a deep 

 suture; length 26, diameter 18 mm. 



Hydatina physis staminea (Mke.) 



Small, with two or three remote spiral lines and spaced, festooned 



axial lines of brown; spire minute, of 2J^ whorls; columellar 



reflection closely appressed; length 9, diameter 6 mm., often 



smaller Micromelo guamensis (Q. & G.) 



Hydatina physis staminea (Mke.) 



Honolulu Harbor, Oahu; Kainalu, Molokai (Wm, A, Bryan). 



All of the Hawaiian specimens seen belong to this subspecies. 

 The typical H. physis is larger and more globose. 

 Hydatina (Aplustrum) amplustre (L.) 



Honolulu Harbor and Kahana, Oahu; Kailua, Hawaii (W. A. 

 Bryan). Kahoolawe (Pilsbry). 



Easily recognized by the pink and white zones bordered with 

 wide blackish lines. One from Kahoolawe measures, length 21, 

 diameter 15 mm. 



Micromelo guamensis (Quoy & Gaimard). Figiire 9. 



Hawaii: Kailua (Wm. A. Bryan). Hilo (Garrett, for Bulla 

 scri-pta) . 



This snail appears to have been col- 

 lected rarely, though described long 

 ago. Besides the peculiarities of shape 

 and color-pattern shown in the figure 

 it has spaced spiral series of oblong 

 punctures, Adeon like, not easily seen 

 without a lens. The narrow spire is 

 level. The specimen figured measures : 

 length 9, diameter 6 mm. Others are 

 smaller. 



AGLAJID.,E. 



Aglaja, better known as Doridium, appears to be well represented 

 in the islands, though so far as I know, each species has been taken 

 but once. Two were described by Pease under the genus Philin- 

 opsis, which appears to be the same as Aglaja. 



The small shell is entirely concealed in the mantle. 

 Aglaja speciosa (Pease) , 



Above fawn, spotted and speckled with white, margins varied 

 with blackish and yellow; sides paler; foot purplish fawn closely 

 freckled with whitish. 3 inches long. 



Fig. 9. — Micromelo guamensis. 



