162 CALIFORNIA ACADEMY OF SCIENCES. 



cephalusGveew), H. herscheUl n. s]). Oalymene blumenbachii Broug. A>ia- 

 phus caudatns'&xong., A. tuber culato-caudatus n. sp., A. (Olenuis) flabellifer? 

 Steiuiuger, A. caivdori u. sp., A. subcaudatus n. sp. C'alymene variolaris 

 Broug., C. macro })hthalma Broug., (7. ? downingict u. sp., C tuberculata n. 

 sp. Asaphiis stokeslin. sp., A. longlcaudaius u. sp. Bumastus barrienms 

 u. sp. Paradoxides bimucronalus u. sp., P. quadrimncronatns u.' sp. 

 Acidaspis brif/htii n. sp. 



Trilobites of the Lower Siluriau (Caradoe & Llandeilo) : Trinudeus 

 caractaci u. sp., T. Jtmbriatun u. sp., T. radiatus u. sp., 7'. lloi/dii u. sp., 

 7'. nuduft n. sp., T.? asaphoides u. sp. Calymene? punctata Briiuu. Asa- 

 pliHx powi.m n. sp. Ilheuufi ? perovalis u. sp. Asaphus duplicatus u. sp. 



Trilobites from the Llaudeilo: Asaphus buchii Hvong., A. t i/r annus n. 

 sp., also var. ornata, A. corndensis u. sp., A. ? vulcani u. sp. Ogyr/la 

 murchisonin. sji. Agnostus pisiformis'/ Jjinwv. 



Cypris inflata, p. 84, has been referred to LKperditia by Joues. 



Metamorpliosis of certain Trilobites as recently 



(liscoverefl by M. Barrande. 



In Rep. 19th Meeting Brit. Assoc. Adv. Sci., 1849, Traus. Sec, p. 58. 

 Sir K. Miirchisou brought before the Section the important discovery 

 of Barrande of the metamorphosis of Trilobites as exhibited in Sao hirsuta. 



On the Silurian rocks of the south of Scotland, 



with a list and description of the Silurian fossils of 

 Ayrshire, by J. W. Salter. 



In Quart. Jour. Geol. Soc. London, vol. 7, 1851, p. 137, pis. 8-10. 



C'heirurus gelasinosus Portl. Asaphus sp. ? Calymene blumenbachii Broug, 

 Phacops stokesit Milne-Edwards. Ilkenus botvmanni ? Lichas laxatus Mc- 

 Coy. Encrinurus pmictatas Briinn. 



Siluria. A history of the oldest rocks in the 



British Isles and other countries. London, 1854, geol. 

 map., 41 pis. 4th ed., London, 1867, geol. map., 42 

 pis. 5th ed., 1872, with atlas of 42 plates and geological 

 map. 



The tigiires are all transferred fi-om the original plates in the "Siluriau 

 System." 



The appendix contains a table showing the vertical range of the Siluriau 

 fo.isils of Britian. 



and Verneuil (E. de) and Keyserling (Alex. von). 



Geology and pakeontology of Russia and the Ural Mount- 

 ains. London, 1845, 2 vols., 50 pis. 



Pakeontology, vol. 2; Crustacea, p. 376, pi. 27. 



