4 THE VOYAGE OF H.M.S. CHALLENGEE. 



Heller (1875)^ proposes two new species of the same genus gathered during the Austrian 

 North Polar Expedition ; both are identical -^dth species described before under other 

 names. 



In 1877 and again in 1879 G. 0. Sars" published lists of the Pycnogonids gathered 

 durino- dredo-ing cruises in the northern part of the North Atlantic, on the coast 

 of Norway, &c. There are in all four new species of Nymphon {N. megcdops, 

 N. macronyx, N. serratmn, and N. paUenoides) , a new genus, Ascorhynchus, with the 

 species Ascorhynchus ahyssi, a new species of Colossendeis {C. angusta), and a new 

 Pallene, P. malleolata. 



Miers (1877)'' treats of the Pycnogonids collected during the last EngUsh Arctic 

 Expedition. He gives two species, neither of which is new, and describes a variety of 

 Nymjihon 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),' 

 Claparede (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 

 Phoxichilidium (?) (P. chelifenim, Claparede), a new species of Phoxichilus {P. lavis, 

 Grube, and two new genera (?) Oiceobathes, Hesse, and (?) Oomenis, 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 thek geographical 

 distribution being discussed. 



About the species of the Mediterranean very little is known. Philippi (1843)" and 



1 Camil Heller.— Die Crastaceen, Pycnogoniden, mid Tunicaten der K. K. Oester. Ungar. Nordpol. Expedition, 

 Denkschrifteu der Mathematisch-Naturwiss. Classe der K. Akad. der Wissensch., Bd. xxxv., Wieu, 1875. 



2 G. 0. Sars.— Prodromus descriptionis Crustaceonun et Pycnogonidarum, quae in expeditioue Norvegica, anno 1876, 

 oljservavit, Arch. f. JIath. og Natiuvid., ii., 1877 ; Crustacea et Pycnogonida nova, quae in itinere 2*0 et S''" expeditionis 

 Norvegicaj, anno 1877 et 1878, collect;! (Prodromus descriptionis), ibid., iv., 1879. 



' Edward J. Miers.— Report on the Crustacea collected by the Natiiralists of the Arctic Expedition in 1875-76, 

 Amials and IMag. of Nat. Hist., fom-th series, vol. xx., 1877. 



' Frey and Leuckart. — Beitrage sur Kenntniss wirhelloser Thiere, 1847. 



^ R. Bohni.— Ueher die Pycnogoniden des Konigl. Zool. Museums zu Berlin, Mouatsber. der Konigl., Akad. der Wiss. 

 1879. 



" P. P. C. Hoek. — Ueber Pycnogoniden, Is'iederl. Archiv. f. Zoologie, iii., 1877. 



' A. de Quati-el'ages.- Memoire sur I'organisation des Pycnogonides, Ann. d. Sc. Natur., S""" Serie, Zoologie, torn. 

 iv., 1845. 



' A. Rene Edouard Claparede. — Beobachtungen tiber Anatomie und Entwickelmigsgeschichte wirbelloser Thiere 

 an der Kiiste von Normandie angestellt, 1863. 



" Hesse. — Annales des Sciences naturelles, Si'iJ"-' Serie, vii., 1867 ; ibid. 5'^"^ Serie, xx., 1874. 



"> Edward Grube. — Mittheilungeu iiber St Malo und Roscoff und die dortige Meeres besonders die Anneliden-fauna, 

 1869 ; MittheUungen iiber St Vaast la Hougue, und seine Meeres, besonders seine Anneliden-fauna, Verhandl. der 

 Schlesischen Gesellsch. f. vaterl. Cultur., 1869. 



'1 A. Phillipi. — Ueber die Neapolitanischen Pycnogoniden, Arch. f. Naturgesch, ix., 1843. 



