c NATURAL HISTORY. 



to the inhabitants of the Arctic Ocean, what the vegetable kingdom is to the inhabitants 

 of the land — the foundation of animal existence. 



ACEPHALA. 



4.— BOLTENIA RENIFORMIS. 



BOLTENIA RENIFORMIS.— Mac Leay, Trans. Linn. S'oc .— vol. xiv., p. 536, pi. 18. 

 ASCIDIA GLOBIFERA.— 5ai.- Supp. to Parry's \st Foyage— 

 ASCIDIA CLAVATA.— i?'aA .• Faun. Grcenl.—p. 303. 



Char. Sp. — B. obscura scabriuscula, corpore subreniformi, orificiis subprominentibus, pedunculo ter- 



minali. {Mac Leay.) 



A single specimen of this extraordinary animal was dredged up from a depth of 

 seventy fathoms, near Elizabeth Harbour. I can add nothing to Mr. Mac Leay's 

 admirable description, except that the colour of the body is a very light brown, that 

 of the pedicle darker. 



5.— CYSTINGIA GRIFFITHSH. 



CYSTINGIA GRIFFITHSH.— AZac Leay, Trans. Linn. Soc— vol. xiv., p. 540, pi. 19. 

 C. ovata globosa cineracea glabra semipellucida, pedunculo vix longitudine corporis. {Mac Leay.) 



This interesting species is of very rare occurrence, even in those seas where it was 

 first discovered ; a single specimen, taken in Fox's Channel, during Sir Edward 

 Parry's third voyage to the Arctic Regions, fortunately for science came under the 

 notice of Mr. Mac Leay, and, together with two other species of Ascidiae from the same 

 place, was the occasion of his learned memoir on the " Anatomy of the Natural Group 

 of Timicata," loc. cit. 



Two specimens were obtained by us near Felix Harbour, but as these were aban- 

 doned with the rest of our collection, it is probable that the individual from which Mr. 

 Mac Leay's description and drawings were taken, is the only specimen ever brought 

 to England. 



