124 TEREDO. 



16. CAMPANULATA, f. 9, Deshayes. — Valvse angustse, area 

 antica brevissima, ala prominenti ad hiatus acute angulata. 

 Stylis elongatis, articulatis ; articulis ornatis, crispatis. — The 

 valves are narrow and the anterior area very short, posterior 

 area with a deeply cut angle separating the prominent wing. 

 The articulations of the stylets are projected and curled out- 

 wards ornamentally. 



17. BEEVis, f. 7, Dei^hayes. — Valvse angustse elongatse 

 parvse ; ala postica angusta, rotunda ; processu subumbonali 

 brevi. Styli discis septenis triangularibiis articulati. — 

 Valves narrow from front to back, long from apex downwards. 

 Stylets with about seven triangular joints. 



18. Stutchburyi, f. 8, Leach MSS. — Valvse parvse, ro- 

 tundae, area antica et ala postica parvis. Stylis brevibus, 

 superne angulatim articulatis, ad latera spinosis. — A very plain 

 little species with small rouoded posterior wing and small 

 angular anterior angle. 



19. DuNLOPi, f. 3, Wright. — Valvse globosse crassse epi- 

 dermide serrato striato indutge ; area postica angustissime, 

 area antica angulatim, divisis ; umbonibus curvis, callosis, 

 lamella accessoria munitis. Styli elongati, extus convexi, 

 intus concavi. — The valves are singularly thick and rounded 

 in form, with a thick brown epidermis sculptured in 

 serrated strise. Unlike all the other Teredines, this species 

 has a little accessory pellet on the hinge ; and, more sur- 

 prising still, it is found boring wood in a purely fresh-water 

 river proceeding from a part of the Granges where the water is 

 absolutely fresh. It is ciu-ious that the only fresh-water 

 Pholas (rivicola) has also a fringed epidermis. 



