Miscellanies. 377 



of works on the mathematical science's, and accordingly, endeavors to 

 have, as nearly as may be, a complete collection of such works. Those 

 who have occasion to purchase mathematical and philosophical books, 

 might, we think, apply to him with much advantage. His address is, 

 Mr. Samuel Maynard, No. 8, Earl's Court, Leicester Square, London. 



4. New TriloUtes. 



(L) Ceratocephala goniata.* 



Communicated to the Western Academy of Natural Science at Cincinnati, May 

 25th, 1838; by John A. Warder. 



Genus, Ceratocephala. ^ 



So named because the head is ornamented with appendages which V 

 so nearly resemble the antennae of recent crustaceans, that this genus ^ 

 which we have ventured to propose, seems to form the link that was 



* Prof. Silliman — Dear Sir — I am desirous to make use of your valuable 

 Journal to publish an account of a new trilobite which has been recently discov- 

 ered. It differs so entirely from the genera that we find described, and is yet so 

 clearly a member of the race, that the erection of a new genus appears necessary, 

 although the proposition is made with diffidence, by one who objects to the confu- 

 sion which is apt to grow out of needless distinctions, and too great subdivisions of 

 natural families. Although it is generally admitted that they are evidently analo- 

 gous to the crab, it has been often and strenously denied that trilobites possessed any 

 organs corresponding to their antenna,. We are now prepared to offer conclusive 

 testimony to the contrary. The specimen, of which we send you a drawino-, was 

 found at Springfield, Clark county, Ohio, in the same locality with tlie Calymene-» 

 Blumenbcichii, bufo .? phlyctanoides, and other rare fossils — (all the remains found 



in that rock are casts of the inner or under side of the crustaceous coverino-) 



the one under consideration I procured last week from the cabinet of Mary A. 

 Warder. 



Two specimens of another species have been found near this; city by J. G. An- 

 thony, on the first of April, presented to the Academy for examination on the four- 

 teenth, and reported on at our meeting of the thirtieth, at which time it was 

 admitted to belong to some unknown genus of trilobites, bearing horns or feelers ■ 

 but the committee to whom it was referred hesitated in describing it, because they 

 were in hopes that some further elucidation would be furnished by new and more 

 perfect specimens. In the mean time, J. G. Anthony wrote letters and sent CEists 

 to Prof. Jacob Green, and to the Academy of Sciences in Philadelphia, to Dr. De 

 Kay of the New York Lyceum, and to Dr. Storer of Boston— so as to disseminate 

 the information as much as possible, and by this means to secure the priority — so 

 that if any of these gentlemen have ventured to erect a new genus from the frao-- 

 ment, I shall be willing to have my species merged in their genus, provided, the 

 characters will embrace it, as my generic characters do his; but as I can hardly 

 imagine they have taken any steps in the matter, and as my specimen was first 

 found and had excited the attention of its possessor, the following paper was pre- 

 pared and read before our Academy on the evening of the 24th instant, at nine 

 o'clock, P. M. Yours, respectfully, J A W 



Vol. XXXIV.— No. 2. 48 " 



