1B81.] THE SURVEY OF H. M.S. 'alert.' 6l 



crowded into a " moss "-like tuft as ia P. belgica. The absolute total 

 length is nearly one third less than that of P. belgica ; the stolon is of 

 regular diameter. There is no median dilatation of the pedicel. The 

 description of P. ainericana, Leidy (J. Ac. Philad. iii. p. 142) recalls 

 in some particulars the present form, viz. its smooth undilated 

 pedicels, the body with crenated border concentrically striated, 

 and the 12 tentacles ; but it is only \ of a Une high, i. e. about '7 

 milhm., whereas this is 1'5 millim. without the head ; the relative 

 positions of the intestine and stomach in the figure differ from 

 those of our species. 



The species described by Studer from Kerguelen Island (Archiv 

 f. Naturg. 1878, p. 124) as " Pedicellina an nov. sp ? Die Wander 

 der 2 mm. hohen gestielten Becher sind volkommen glatt " is very 

 likely identical with P. australis. A species is also mentioned with- 

 out name by Joliet (Compt. Rend. 1879, Febr., p. 392), from the 

 island of St. Paul, north-east of Kerguelen Island. 



CRUSTACEA. 



By Edward J. Miers, F.L.S., F.Z.S. 



(Plate VII.) 



The Crustacean fauna of the Straits of Magellan and of the adjacent 

 coasts and islands has been more thoroughly investigated than that of 

 many other parts of the South-American continent, as, not to mention 

 various species described by Guerin-Mcneville, JMilne-Edwards, 

 "White, and other authors, considerable collections were made in 

 these regions by the naturahsts of the United-States Exploring Ex- 

 pedition under Commodore Wilkes, U.S.N., and described by Dana 

 in his great work^ More recently Dr. Cunningham has published 

 an account of the collections made by him during the voyage 

 of H.M.S. ' Nassau,' wherein will be found a hst, accompanied by 

 notes, of the Crustacea and Cirripedia, most of which were collected 

 on the southern, south-eastern, and south-western American coasts". 



The collection received from Dr. Coppinger contains, as was to 

 be anticipated, many species well known to science, but also several 

 which are apparently'undescribed, and others of which the range has 

 not hitherto been ascertained to extend in a southerly direction as 

 far as the Magellan Straits ; moreover the localities, depth of water, 

 and the nature of the sea-bottom have in nearly all cases been 

 carefully noted. 



The Crustacea of the Magellan Straits are essentially Antarctic in 

 character : many of the species are known to occur at New Zealand, 

 the Auckland and Kerguelen Islands, and, no doubt, range through- 

 out the whole extent of the Southern Ocean ; others, however, occur 

 on the Chilian coast or even further north. Although the Crustacea 



1 U.S. Exploring Expedition, xiii., xiv., Crustacea, parts 1, 2 (1852, 1853). 

 - Trans. Linu. Soc. sxvii. p. 465 (1871). 



