so)ne new Procellariidse, G8 



carneis, digitis ac membrana intcrdigitali nigris, excepta 

 parte basali interna tarso concolori ; iride brunnea. 

 Long. tot. Oni-SoO, alse Om-300, caud. 0°i-140, rostr. a fronte 

 0'°-029, tars. O'^-OSl, dig. med. cum ung. 0°i'048. 



The above is the description of what appears to be a fully 

 adult specimen. The other one^ perhaps youngeryhas the sides 

 of the head whitish, the white of the basal portion of the fea- 

 thers showing itself; the gular collar is not so much marked; 

 and the lower series of the under wing-coverts, together with the 

 basal portion of the remiges, are decidedly white. These are the 

 only appreciable differences between our two specimens. This 

 species is near akin to the preceding one, but differs in being 

 smaller, more slender, in having a much smaller and weaker 

 bill, and, moreover, in having no trace of silky white on the 

 forehead ; nor is the anteocular region darker ; besides, its under 

 tail-coverts are greyish-black, and their tips bordered with 

 white. 



This species appears also to have many affinities with P. neg- 

 lecta, Schlegel ; but besides the difference of habitat, P. ncglecta 

 being from the Polynesian islands, this last species, according to 

 Schlegel, has " les tiges des remiges blanchdtres," while in ours 

 they are black. 



Finally, j^. arminjoniana appears allied to P. parvirostris, 

 Peale (from the Pacific), which species has all its upper parts of 

 a sepia-bi'own without the least admixture of cinereous, which 

 last character is conspicuous in our species, on account of the 

 lighter edges of the feathers; besides, our bird has a white 

 throat, while that of P. pai-virostris, Peale (Cass. he. cit. pi. 40), 

 is of the same colour as the upper parts. 



We have named this species after Captain Victor Arminjon, 

 R.I.N., the gallant officer who commanded the ' Magenta ' on her 

 voyage, as a slight token of gratitude for the efficient manner 

 in which he aided to render more complete our researches on 

 the pelagic fauna. 



3. ^STRELATA DEFILIPPIANA, sp. nOV. 



" This species was seen for the first time in our wake on the 

 5th of August ; it followed us up to the 10th, in lat. IS'^ 4' S., 

 long. 79° 35' MV., not far from the Peruvian coast. It reap- 



