202 Rev. W. A. Leighton on the Byitish Graphidese, 



Heliophoca Atlantica. 



Fur short, adpressed, olive-gray, very obscurely grisled at the 

 tips of the hairs. Chin and under pai'ts of the body rather 

 paler. 



Length 5 feet 5 inches. 



Hab. Madeira. R. MacAndrew, F.R.S. &c. 



While on the subject of Seals, I may draw the attention of 

 natm-alists on the coast of the Pacific to the account of the Sea 

 Horses said to be found in abundance on the seaward part of 

 the island of St. Lorenza near Callao, mentioned in M. Bonelli's 

 Travels in Bolivia, i. 90 & 128. 



I have never heard of that genus living out of the Arctic 

 Ocean, and should have believed that the author had mistaken 

 the Sea Bear [Otaria Leonina) for the Sea Horse, if he did not 

 describe " the two great white tusks projecting from the mouth 

 on either side,^^ and further observe, that ^'the tusks are of 

 great value and form an important article of commerce" (see 

 i. 90), which cannot apply to the tusks of the Sea Bear. 



It is to be observed that the Peruvian continuation of the 

 Antarctic current runs up the shores of Chili and Peru (see Journ. 

 Roy. Geog. Soc. 1853) and chills that coast. This may explain 

 why seals are found so near the tropics in those seas. I fear 

 that M. Bonelli is not to be relied on for his natural-history ob- 

 servations, for he states that the cedar, mahogany and banyan 

 tree (i. 79), and the date-palm (i. 146) grow on the coast of Peru. 



XX. — Monop-aph of the British Graphideae. 

 By the Rev. W. A. Leighton, B.A., F.B.S.E. 



[Continued from p. 97.] 



8. Opegrapha Tumeri. Thallus very thin, pale dirty-yellow, 

 bordered with black ; lirelliB very prominent, sessile, mostly 

 simple, slender and linear ; disk very nai'row, uniform ; proper 

 margins plump, rounded and incurved; sporidia in asci, eight, 

 linear-obovate, 3-septate, pale yellow. 



Opegrapha betuUna, Sm. E. Bot. t. 2281. excl. syn. (1811) (good, the mag- 

 nified figure excellent) ; Hook. Br. Fl. 2. 145. excl. syn. 



On birch. Hurst Pierpoint, Sussex! Bradwell ! Burgh! Suffolk! 

 Mr. Borrer. New Forest, Hants ! Mr. Lyell in herb. Bor7-er. 

 Ireland ! Miss Hutchitis in herb. Borrer. Loppington ! Shrop- 

 shire. 



Thallus very thin, membranous, pale dirty-yellow, more or less 



