Mr. Jeffreys' Synopsis of British Species of Teredo. 125 



Jardin des Plantes. The localities of both the last-mentioned 

 specimens are unknown. 



11. T.fusticulusfj n. s. 



Tube short and straight, with a slight calcareous lining, which 

 is not easily separated from the wood. It is thickened inter- 

 nally at the opening, and has a few transverse wrinkles in 

 that part. Valves round, thin, compressed ; body smooth, 

 glossy, white under a brown epidermis; anterior auricle of 

 moderate size, angle about 50°, striae numerous; posterior 

 auricle round, expanded, and appressed to body, internal edge 

 well defined ; fang broad, obtuse ; tubercle small and sunk ; 

 apophysis thin and narrow. Pallets club-shaped, formed of 

 several transverse layers, and externally tuberculate; stalk 

 twice the length of pallet. 



Dimensions : length (of valves) -^ n ; breadth nearly as much. 



Habitat : in Cedrela odorata from Leith (Jeffreys). 



B. Having compound pallets (Xylotrya, Leach) . 

 12. T. cucullataf, n. s. (Norman, MS.) 



Tube long, thick, not easily detached from the wood, internally 

 wrinkled near the opening. Valves roundish-oval, rather 

 convex; body marked transversely, but regularly, with a few 

 strise or impressed lines ; anterior auricle small, angle obtuse, 

 striae numerous ; posterior auricle dilated and appressed, 

 having its apex nearly on a level with the crown or umbo of 

 the valve, inner edge free and overlapping the body ; fang 

 broad; tubercle small; apophysis sickle-shaped. Pallets 

 composed of 20-30 calyciform joints or cuculli, which are 

 broad on the outer surface, and slightly overlap one another 

 in succession, lateral edges setaceous, with short filaments ; 

 stalk cylindrical, of same length as pallet. 



Dimensions : length (of valves) -^J 1 ; breadth -A-". 



Habitat : in drift fir-wood, Guernsey (Lukis) ; Sussex coast 

 (Dennis) ; in teak, with the next species, at Belfast (Thompson). 



The pallets resemble those of T. minima, Blainville (T. pal- 

 mulata, Philippi), in having the front margin quite plain ; but 

 they differ in the joints being of nearly equal breadth through- 

 out, and (especially in the earlier stage of growth) being much 

 more numerous and compact. The pallets of T. cucullata are 

 also three or four times as long as those of T. minima. The tube 

 and valves of each species are easily distinguishable. 



