Miscellaneous. 357 



and below ; upper surface of the interferaoral membrane hairy, with 

 the exception of a small part at its posterior extremity which is 

 naked ; under surface also hairy, but much less so than the upper ; no 

 tail ; tibia and fibula included within the membranes ; four slender 

 toes, compressed, of nearly equal length, the outer one being a little 

 shorter than the others ; they are sparingly furnished with thin hairs 

 varying in length ; the terminal phalanx of each is provided with a 

 robust, sharp and incurvated nail. The index finger like the thumb 

 is also furnished with a short and incurvated nail. 



Measurements. inches. 



Total length 3£ 



Length of head If 



Distance between anterior margin of nostril and anterior canthus 1 . . 



of eye / •*• 



Distance between angle of mouth and anterior canthus of eye f 



Length of neck, body and tail 3 



Length of fore-arm 3 



Length of tibia \\ 



Spread 14$ 



Length of thumb f 



Dental Formula. 



Incisors. Canines. False Molars. Molars. 



2—2 1—1 1—1 2—2 



2—2 1—1 2—2 3—3 



This species I have named after my esteemed friend S. S. Halde- 

 man, Esq., author of the ' N. American Limniades,' who obtained it 

 with other African animals from Dr. Goheen, Physician to the Ame- 

 rican Colonization Society. — Silliman's American Journal, Sept. 1846. 



Description of two new species of Fossil Echinodermata from the 

 Eocene strata of the United States. By Samuel George Morton, 

 M.D. 



Cidaris alabamensis. — Compressed, pentagonal, the angles rounded 

 so as to form a ten-sided figure. Ten rows of tubercles, with nine 

 or ten in each row. Ambulacra arranged in five pairs, with delicate, 

 slightly oblique fissures separated by a double elevated line. Surface 

 between the tubercles and ambulacra finely granulated. 



Galerites ? Agassii. — Elevated, hemispherical, with four pairs of 

 ambulacra which diverge from the apex and meet at the margin, 

 having each two rows of pores connected by transverse fissures. 

 Surface marked by numerous distinct granulations, which are con- 

 tinued over the whole base of the fossil. 



I have much pleasure in dedicating this remarkable species to M. 

 Louis Agassiz, whose profound researches into this class of organized 

 beings have thrown much new light en their structure, affinities and 

 geological relations. 



Both these fossils were found by Dr. Albert Koch in the Eocene 

 strata of Washington Co., Alabama, and by him politely submitted 

 to me for description. — Silliman's American Journal, Sept. 1846. 



