22 Arachn. 
ARACHNIDA (l878). 
PYCNOGONIDEA. 
Dohkn, a. Neuere Untersuchungen iiber Pycnogoniden. MT. zool. 
Stat. Neap. i. pp. 28-29. 
Consists of preliminary general notes on the organisation of the Pycno- 
gonidce, defending the author’s statements as to the typical number of the 
pairs of feet (7) against Semper’s objections [Zool. Rec. xi. p. 220] ; 
stating that two kinds of blood-corpuscles are to be found in these crea- 
tures (one, amoeboid) ; and pointing out the rather considerable differ- 
ences caused by sex and age. 
Jarzynsky, — . PrtBmissus Catalogus Pycnogonidarum inventarum in 
mari glaciali, ad oras Lapponite Rossicm et in Mari Albo, anno 1869 
et 1870. 
[Omitted from former Records; not seen by the Recorder.] 
Wilson, E. B. Synopsis of the Pycnogonida of New England. Tr. 
Conn. Ac. v. pp. 1-26, pis. i.-vii. 
The author divides the group into the following families : — 
i. Pycnogonida, for Pycnogonum, Brunnich. 
ii. Acheli[i]da, for Tanystylum, Miers [infra], and Achelia, 
Hodge. 
iii. Pallenida, for Pallene, Johnst., Pseudopallene, Wilson [infra], 
Phoxichilidium, Milne-Edw., and Anoplodactylus, Wils. 
[infra], 
iv. Nymphonida, for Ammothea, Leach, and Nymphon, P. 
Fourteen species are described (4 new), and portions of each figured. A 
table is given showing general geographical and bathymetrical distri- 
bution. 
G. 0. Sars, Arch. math. Naturv. 1877, pp. 337-371, in a like paper on 
the Crustacea, &c., collected during the Norwegian Expedition of 1876, 
describes various Pycnogonids, including one new genus and 4 new species. 
Colossendeis proboscidea (Sabine, as Phoxichilus), measuring nearly a 
foot between the tips of the feet ; Sars, 1. c. p. 368. 
Nymphon hirtum, var. ohtusidigitatum, Miers, redescribed and figured 
by the author in Nares’s “ Narrative of a Voyage to the Polar Sea,” ii. 
p. 248, pi. iii. fig. 3, Franklin Pierce Bay. N. gracilipes (Miers, 1875, 
nec Heller) renamed antarcticum, and N. brevicaudatum, Miers, also 
redescribed and figured, from Kerguelen ; id. in Zoology of the Transit 
of Venus Expedition, Crustacea, pp. 12 & 13, pi. xi. figs. 7 & 8 [antici- 
patory of Phil. Tr. clxviii.]. Note on the number of feet in N. gracile, 
Leach ; S. Jourdain, Rev. Montp. 1878 [not seen by the Recorder]. 
New genera and species : — 
Tanystylum, Miers, Trans. Venus Exp. Crust, p. 14. Mandibular palpi 
simple, not articulate or cheliform ; third (ovigerous) pair of appendages 
10 jointed. Abdomen terminated by a long styliform process. For 
