23S Miscellaneous. 



Description of a new species o/Thracia. By C. B. Adams. 

 Thracia inequnlis. T. testa fragili, per-inequilaterali, per-inequivalvi, 

 irregulariter striata, postice truncata ; valva sinistra subplanulata ; 

 altera per-convexa ; callo nymphali cochleariformi, anterius elon- 

 gate ; ossiculo lunato, semicirculari. 



Shell white, very thin, before broadly and behind narrowly trun- 

 cate, very inequilateral and inequivalve, much deflected to the left 

 anteriorly ; with the striae of growth unequal, numerous and crowded 

 at the extremities, where, under a magnifier, the surface appears 

 shagreened by minute wrinkles of the striae ; epidermis very thin, 

 brownish, thicker at the extremities ; left valve nearly flat, with five 

 obtuse angles radiating from the beak ; right valve much larger and 

 very convex, emarginate in the whole of the posterior truncation, 

 with a groove and elevated umbonal angle denning the areolar re- 

 gion, its inferior margin sinuous ; beaks small, pointed, lamelliform, 

 the right one moderately excavated for the reception of the other ; 

 nymphceal callosities spoon-shaped, very much produced forwards and 

 inwards ; ossiculum semicircular and lunate, with an impression on 

 the centre of each side, but much deeper on one side, situated be- 

 tween the spoon- shaped apophyses and the dorsal margin. 



Dimensions. — Length 1*2 inch ; height '75 inch ; width "45 inch ; 

 length of ossiculum '1 inch*. Hab. Gulf of Mexico. 



Remarks. — A single specimen of this interesting species was pre- 

 sented to the cabinet of this college by the Rev. Wm. T. Hamilton, 

 of Mobile, Ala. It is remarkable for the disparity of the valves, the 

 irregularity of its form, and the sharp lamelliform beaks. — From SiU 

 limans American Journal for July 1842. 



BIRDS OF KENT. 



Mr. Mummery of Margate sends us the following notices of birds 

 which have lately been met with by him in and near the Isle of 

 Thanet. 



Sept. 29, near Reculvers, having just shot several red-starts, Syl- 

 via Phoenicurus ; he observed a small bird not unlike a female red- 

 start, and having shot it found it to be a very fine female blue- 

 throated warbler, Sylvia suecica, only two instances of the occur- 

 rence of which are recorded by Mr. Yarrell. It is placed in the 

 Margate Museum. A very fine adult male hen-harrier, Buteo cya- 

 neus, has just been received, shot by W. Mockett, Esq., of Sandwich, 

 and presented by him to the museum. Sept. 9, near Reculvers, Sco- 

 lopax major, very large, weighing half a pound and half an ounce. 

 About the middle of September several specimens of the spotted 

 crake. A great number of the common gannet have made their ap- 

 pearance as usual at this season. These birds pay us a regular visit 

 with the herrings, following them for food ; I have known several to 

 be picked up along the coast either dead or in a stupid state. 



"This autumn," Mr. Mummery adds, "we have had very few 

 terns ; in fact, I never knew so few. The common tern used to 

 breed rather plentifully along the coast between Margate and Re- 

 culvers ; but within these ten years they have abandoned the beach 

 * The ossiculum is enlarged about 2£ linear diameters. 



