+ THE VOYAGE OF H.M.S. CHALLENGER. 
Heller (1875) ? proposes two new species of the same genus gathered during the Austrian 
North Polar Expedition ; both are identical with species described before under other 
names. 
In 1877 and again in 1879 G. O. Sars* published lists of the Pyenogonids gathered 
during dredging cruises in the northern part of the North Atlantic, on the coast 
of Norway, &. There are in all four new species of Nymphon (N. megalops, 
N. macronyx, N. serratum and N. pallenoides), a new genus, Ascorhynchus, with the 
species Ascorhynchus abyssi, a new species of Colnseqimiss (C. angusta), and a. new 
Pallene, P. malleolata. 
Miers (1877)°* treats of the Pycnogonids collected during the last English Arctic 
Expedition. He gives two species, neither of which is new, and describes a variety of 
Nymphon hirtum. 
In regard to the coast of Germany and the Netherlands not a single species has been 
recorded which is not found on the English coast. Occasionally enumerations of species 
have been published by Frey and Leuckart,* and Bohm.’ In a paper I published myself 
(1877) ° I described the four genera, species of which are found on the Dutch coast. 
The Pycnogonids of the French coast have been studied by Quatrefages (1844),’ 
Claparéde (1863),° Hesse (1867-74),’ and Grube (1868-72).” Their studies resulted in 
the proposal of a new species of Ammothea (A. pycnogonoides, Quatr.), of a new 
Phoxichilidivin (2) (P. cheliferum, Claparéde), a new species of Phowichilus (P. levis, 
Grube), and two new genera (?) Oiceobathes, Hesse, and (?) Oomerus, Hesse, both very 
insufficiently described. The Pycnogonids found on the coasts of France, the British 
Isles, Germany, &c., are not yet sufficiently well known to allow of their geographical 
distribution being discussed. 
About the species of the Mediterranean very little is known. Philippi (1843) " and 
1 Camil Heller.—Die Crustaceen, Pycnogoniden, und Tunicaten der K. K. Oester. Ungar. Nordpol. Expedition, 
Denkschriften der Mathematisch-Naturwiss. Classe der K. Akad. der Wissensch., Bd. xxxy., Wien, 1875. 
2 G. O. Sars.—Prodromus descriptionis Crustaceorum et Pycnogonidarum, quae in expeditione Norvegica, anno 1876, 
observavit, Arch. f. Math. og Naturvid., ii., 1877 ; Crustacea et Pyenogonida nova, quae in itinere 2 et 3tio expeditionis 
Norvegice, anno 1877 et 1878, collecta (Prodromus descriptionis), ibid., iv., 1879. 
3 Edward J. Miers.—Report on the Crustacea collected by the Netairaliats of the Arctic Expedition in 1875-76 
Annals and Mag. of Nat. Hist., fourth series, vol. xx., 1877. 
4 Frey und Leuckart. —Beitrige sur Kenntniss qaxbellgser Thiere, 1847. 
5 R. Bohm.—Ueber die Pyonvgoniden des Konig]. Zool. Museums zu Berlin, Monatsber. der Konigl., Akad. der Wiss. 
1879. 
5 Pp. P. C. Hoek.—Ueber Pyenogoniden, Niederl. Archiv. f. Zoologie, iii., 1877. 
7 A. de Quatrefages.—Mémoire sur Vorganisation des Pyenogonides, Ann. d. Sc. Natur., 3™¢ Série, Zoologie, tom. 
iv., 1845. 
8 A. René Edouard Claparéde.—Beobachtungen tiber Anatomie und Entwickelungsgeschichte wirbelloser Thiere 
an der Kiiste von Normandie angestellt, 1863. 
® Hesse.—Annales des Sciences naturelles, 5!™¢ Série, vii., 1867 ; ibid. 5!me Série, xx., 1874. 
© Edward Grube.—Mittheilungen iiber St Malo und Roscoff und die dortige Meeres besonders die Anneliden-fauna 
1869 ; Mittheilungen tiber St Vaast la Hougue, und seine Meeres, besonders seine Anneliden-fauna, Verhandl. der 
Schlesischen Gesellsch. f. vaterl. Cultur., 1869. 
1 A, Phillipii—Ueber die Wenpalitaniscte n Pyenogoniden, Arch, f. Naturgesch, ix., 1843. 
