30 PHANETA-STOMATIA. 



Genus PHANETA H. Adams, 1870. 



Phaneta H. AD., P. Z. S. 1870, p. 793. TRYON, Struct, and Syst. 

 Conch, ii, p. 317. FISCHER, Manuel de Conchyl., p. 839. 



The animal is unknown. The genus was placed by Adams in the 

 Valvatidoe, probably because it is a fluviatile mollusk. Try on first 

 placed it in the Stomatellidce, and is followed by Fischer, who places 

 the'group between Stomaiella and Gena. It is not known whether 

 an operculum is developed, but I regard it as likely. 



P. EVERETTI H. Adams. PI. 1, figs. 18, 19, 20. 



Shell depressed-trochiform, rather thin, whitish, covered with a 

 thin pale reddish epidermis ; spire convex-conic, apex obtuse, sub- 

 lateral ; suture distinct ; whorls 3, . slightly convex, rapidly increas- 

 ing, ornamented with obscure oblique strise and some irregular spiral 

 ones ; the last whorl acutely carinated ; base subconcave, the col- 

 umellar region excavated, closely concentrically striated. 



Alt. 6, diam. maj. 8, rnin. 7 mill. (Ad.~) 



Siniwan River, Borneo, near Sarawak; attached to submerged 

 logs. 



Phaneta everetti H. AD., P. Z. S. 1870, p. 794, t. 48, f. 20. 

 Genus STOMATIA (Helbling) Lamarck, 1801. 



Stomatia HELBLING 1779. Stomatia LAMARCK, Syst. des Anim. 

 s. Vert, et Tab. gen. etc., p. 96. Type, S. phymotis Helbl. Stomax 

 MONTFORT Conch. Syst. ii, p. 110, 1810. 



Stomatia is closely allied to Stomatella, differing in the generally 

 more elongated shell with a series of short folds or puckers below 

 the sutures ; usually the body-whorl has a tuberculous carina ; there 

 is no operculum typically. I am prepared however to learn that 

 some of the species are operculate. The animal is too large to en- 

 tirely enter the shell ; the foot large, fleshy, tubercular, greatly 

 produced posteriorly ; epipodium fringed, with a more prominent 

 fimbriated lobe behind the left tentacle, and on the right there is a 

 slightly projecting fold or gutter leading to the respiratory cavity. 

 There are digitated inter-tentacular lobes. 



S. PHYMOTIS Helbling. PI. 54, figs. 16, 17, 21, 22. 



Shell Haliotis-shaped, lengthened, with scalar spire, the last whorl 

 very deeply descending ; solid, lusterless, red, marked at suture, 

 keel and base with olive or brown articulated with white. Surface 

 very rough, with a strong double nodulous keel at the middle of the 



