Mr. Gray's Monograph of the Genus Teredo, 409 



vided with triangular horn-like projections, and the tail being 

 shorter than the body, and very thick and compressed at the 

 base. In naming the species, I think that I cannot do better 

 than dedicate it to its scientific and industrious proprietor, in 

 whose collection it has been ior a considerable time. 

 Chamelco Brookcsiana. 



Superciliis elevatis angularibus, denticulatis ; occipite piano; 

 fronte concavo ; squamis parvis irregularibus ; caud;"i brevi basi 

 compresso-incrassata dorsi lateribus, mento antice, membra- 

 norumque marginibus serie squamarum parvarum spinosarum 

 instructis. 



Inhab. Mus. Dovi. Brookes. 



Length 2^, body 1:^, tail 1, inches long. 



Eyebrows elevated triangular, edges denticulated, innerside 

 keeled, denticulated; forehead concave, especially in the centre; 

 cheeks nearly flat; occiput flat with a slightly elevated ridge 

 on each side, commencing from the tip of the superciliary 

 elevations and nearly meeting on each side ; head covered with 

 small irregular scales ; front of chin with 4 — 6 spine-like scales ; 

 body and tail compressed, edges not denticulated ; side of the 

 back just at the origin of each of the ribs, with a series of 

 rather large conical spine-like scales, and the legs with scat- 

 tered similar scales ; rest of the scales of the body and tail 

 small and irregular ; tail base very thick, compressed. 



The above-described individual is probably young. No- 

 thing is known of its country ; but it is probably from Africa. 



P.S. Being engaged on an illustrated monograph of this 

 genus, I shall be happy to see any specimen that may be in 

 private collections. J. E. G. 



British Museum, Nov. 1, 1827. 



LXVIII. A Monograph of the Gcnns Teredo of Linne, with 



descriptive Characters of the Species in the British Museum. 



Bi/ John Edward Giiay, Esq. F.G.S. ($-c.* 

 'T'HIS genus is best distinguished from Pholas by the ab- 

 ^ sence of the back-valves, and by being always provided 

 with a shelly sheath. The pallet at the sides of the trachea 

 of the animal appears to form a very good character to distin- 

 guish the species. 



* Pallet unknown (probably like the next). 



Fistulana personata, Lam. A.M. Tcredina per sonata. Lam. 

 Ann. Mus. xii. t. 43. f. 67. Teredo. Sow. Foss. Shells. 



Tubes cylindrical ? Shell globular. Valves as long 



as high. Anterior gape, an equilateral triangle; hinder gape 

 ovatt;. Front lobe of the valves recurved, hinder lobe conccn- 



• Communicated by tlic Author. 

 New Series. Vol. 2. No, 12. Z^rr. 1827. ^G trically 



