REPORT ON THE PYCNOGONIDA. 5 
Costa (1838—61)* published short notes on the Pycnogonids found there. Philippi proposed 
a new genus(Hndeis), which is perhaps identical with Pasithoe, Goodsir; and a second genus 
(Pariboea), with the species Pariboea spinipalpis. Costa introduces (1838) the genus 
Phanodemus, in all probability identical with Pephredo, Goodsir; in his Microdoride medi- 
terranea (1861) he proposes three new genera: Rhynchothorax, Platychelus, and Aleynous. 
From the Gulf of Naples Costa knows in all seven species, whereas the total number of 
species of the Mediterranean found in Philippi’s paper is only four. A monograph on 
_ the Pycnogonids of the Mediterranean, and especially of the Gulf of Naples, will very pro- 
bably soon appear ; it will form the second part of the Studi e Ricerche di Cavanna (1877),” 
and will also be published by Dohrn, as announced in his Neue Untersuchungen (1878).” 
Of all Pycnogonida, those found on the west coast of North America are best known. 
Careful attention was paid to them by Stimpson (1852),* Verrill, Smith (1874),’ but 
especially by Wilson (1878-80),° who in his Pyenogonida of New England, enumerates 
fourteen species belonging to nine genera, two of which (Psewdopallene and Anoplo- 
dactylus) are new to science. Though I do not believe that these new genera after a 
careful examination will hold good, and though I think it a pity that Wilson in his 
researches has not taken advantage of recent investigations (especially those of Cavanna), 
yet there can be no doubt, I believe, that his paper is one of the best descriptive publi- 
cations after those of Johnston and Kroyer. 
For the other countries of our globe, a very brief enumeration may suffice. As far 
as I have been able to ascertain, by far the greater number of the species described are 
littoral ; from the open ocean very few species are recorded. ‘Two species described by 
White (1847),’ inhabiting the South Sea, are exceptions. White describes them as species 
‘of Nymphon, whereas I believe that they ought to be considered as Phoxichilidiums. 
From the open ocean are also those species (one of Mymphon, another of Phowichilidium) 
mentioned by Grube (1869)* as occurring in the China Sea. Grube’s descriptions as 
well as those of White are extremely incomplete. 
Wood-Mason (1873)° described a species of a genus which he believed to be new, 
1 QO. G. Costa.—Fauna del Regno di Napoli, Crostacei et Aracnedi, Napoli, 1838 ; Microdoride mediterranea, tomo 
primo, Napoli, 1861. 
2 G. Cavanna.—Studi e Ricerche sui Picnogonidi, parte prima (Publicazioni del R. Istituto di Studi superiori 
pratici et di perfezionamento in Firenze, Sezione di Scienze fisiche e naturali), Firenze, 1877. 
3 A. Dohrn.—Neue Untersuchungen iiber Pyenogoniden, Mittheil. a. d. Zoologischen Station zu Neapel, i., 1879. 
# William Stimpson.—Synopsis of the Marine Invertebrata of Grand Manan, Smithsonian Contributions to Know- 
ledge, January 1853. 
5 Smith in Report on the Invertebrata of Vineyard Sound. In Part I. of the Report on the Condition of the Sea- 
Fisheries of the South Coast of New England, 1873. 
6 E. B. Wilson.—Descriptions of Two New Genera of Pycnogonida, American Journal of Science and Arts, 
vol. xv., 1878 ; Synopsis of the Pycnogonida of New England, Transactions of the Connecticut Academy, vol. v., 1880. 
7 Adam White——Descriptions of New or Little-Known Crustacea in the Collection at the British Museum, Pro- 
ceedings of the Zoological Society of London, part 15, 1847. 
8 E. Grube in Jahresbericht der Schlesischen Ges. fiir vaterlandische Cultur, Breslau, 1869. 
® James Wood-Mason.—On Rhopalorhynchus kréyert, a new Genus and Species of Pycnogonida, with plate xiii., 
Journal of the Asiatic Society of Bengal, part 2, 1873. 
