Mr. A. Murray on Coleoptera from Old Calabar. 83 



ample of Solander's species. In shape it is almost regularly 

 oval, and longer than wide ; the valves almost equally convex 

 and deep, while in the dorsal valve there exists a shallow median 

 depression or sinus close to the front, and which corresponds 

 with a broad, slightly elevated mesial fold in the ventral valve. 

 The beak of the ventral valve is moderately produced, incurved 

 and truncated by a large circular foramen, partly margined by 

 a deltidium in two pieces. In the interior of the dorsal valve 

 the loop is elongated and reflected, while a sharp raised septum 

 extends from under the cax'dinal process to about half the length 

 of the valve. This fine specimen measured 3 inches 2 lines in 

 length by 2 inches 8 lines in breadth, and 2 inches in depth. 



Now the largest Tertiary Terebratula with which I am at 

 present acquainted measures 4 inches 2 lines in length by 

 3 inches 1 line in breadth, and 2 inches 1 line in depth ; but 

 although the Crag Terebratula grandis, to which we would refer, 

 does very much resemble in general form the recent W. venosa, 

 the Tertiary shell was possessed of a short loop, and consequently 

 is a true Terebratula, while T. venosa has an elongated one 

 characteristic of the subgenus Waldheimia. 



Admiral Sulivan informs me that W. venosa may perhaps 

 occur also near Tierra del Fuego, where he supposes Solander's 

 shell might have been found, as he is doubtful whether that 

 naturalist ever was at the Falklands ; and he thinks it surprising 

 that during his own long service in that region, while in com- 

 mand of the 'Beagle,^ the shell was never found by Darwin 

 or any other of the officers on board, although the dredge was 

 frequently at work. 



In conclusion, I may here add that both the Cretaceous and 

 Jurassic periods possessed one or two very large species of Tere- 

 bratula ; but none that I am a\vai*e of attained the proportions 

 of the largest example of T. grandis with which we are acquainted. 

 In the Triassic and Palaeozoic periods the species of the genus 

 are fewer in number and of much smaller proportions. 

 I remain. Gentlemen, yours, &c., 



Thomas Davidson. 



XI. — List of Coleoptera received from Old Calabar, on the West 

 Coast of Africa. By Andrew Murray, F.L.S. 



[Continued from p. 2.S.] 



Bostrichidae. 



Apate, Fab. 



This genus is in a state of considerable confusion. The few 

 species described are for the most part of old date, being chiefly 



6* 



