24 Arachn. 
ARACHNIDA. 
treats of the Pycnogonids of the Breton coast, and of those of the coast 
of Holland, and gives (p. 523) a list of the works of the 27 authors 
cited. The following classification is proposed :—Archipycnogonum, 
comprising 4 families : i. N^ymphonidce, containing 2 genera, Nymphon 
and Pallene] ii. Ascokrh YNC iiiDiE, containing 8 genera, Ascorrhynchus, 
Zetes, Ammothea^ Bohmia, Lecythorrhynchus, Dorrhynchus, Tanystylum, 
Farihoia ; iii. CoLOSSENDEiDiE, containing 3 genera, Colossendeis, Endeis, 
Discoarachne ; iv. PHOXiciiiLiDAi, containing 5 genera, Pallenopsis, 
PlioxicJnlidkim, PJioxichilufi, Hannonia, and Pycnogonum. 10 species, of 
which 1 is new, comprised in 6 genera, are described. 
[Hoek, P. P. C.] Report on the Pycnogonida. Zoology of the Voyage 
of H.M.S. ‘Challenger,’ Pt. x. pp. 1-167, pis. i.-xxi. and 2 woodcuts. 
Reviews (pp. 1-6) the more important publications on this group ; 
gives (pp. 9-16) a list of the known genera, with remarks on their geo- 
graphical distribution, and (pp. 17-36) a catalogue of known species, with 
indications of the habitat and range of depth of each. At pp. 36--93 is a 
description of the species dredged during the ‘ Challenger’ Expedition ; 
pp. 94-99 forms Appendix i., and describes the species dredged during 
the cruise of the ‘Knight-Errant’ ; pp. 100-144, forms Appendix ii., and 
contains contributions to the anatomy and embryology of the Pycnogonidce. 
The contents of the Report are summarised, pp. 145-148, from which it 
appears that 43 species obtained by the ‘ Challenger ’ and ‘ Knight- Errant ’ 
are described, 33 being new; 3 new genera are also characterized. The plates 
are excellent, and give highly magnified figures of dissections of various 
species, illustrating the internal and external structure and embryology. 
. The Pycnogonids dredged during the cruises of the ‘ Willem 
Barents’ in the years 1878-79. Niederl. Arch. Zool. 1881, Suppl. i. 
pp. 1-26, pi. i. 
Gives (p. 5) a list of species at present known to inhabit the higher 
northern latitudes. 8 species (1 new) are described and figured. 
Wilson, E. B. Report on the Pycnogonidce. Reports on the results of 
dredging, under the supervision of A. Agassiz, along the East Coast 
of the United States during the summer of 1880, by the United 
States Coast Survey steamer, ‘ Blake,’ Commander, J. R. Bartlett, 
U. S. Navy. Bull. Mus. C. Z. viii. pp. 239-256, pis. i.-v. 
10 species (5 new) are mentioned or described; 5 genera are repre- 
sented, 2 being characterized as new (see p. 147 of Report on the Pycno- 
gonida, Zoology of H.M.S. ‘ Challenger,’ where Hoek criticizes the new 
genera and species). Reference is made to the genera Scceorrhynchus and 
Colossendeis, as showing the independence of the accessory legs, and first 
pair of ambulatory legs, and the consequent disproof of the supposed 
Arachnid affinities of the Pycnogonidea. [Cf. Arch. Z. exper. x.; Notes et 
Revue, p. li., where an abstract and summary are given.] 
^ Ammotheid2E. 
Parana castelli, p. 125, pi. i. figs. 1-16, and ii. fig. 1, and B, arenicola, 
p. 129, pi. ii. figs. 2-8, Gulf of Naples, spp. nn. ; A. Dohrn, 1. c. 
