20 Ai'achn* 
ARACHNIDA. 
PHALANQIIDiE. 
Gagrella inermis, p. 95, G. elegans, p. 96, pi. iii. fig. 14, and G. obscura, 
p. 96, spp. nn., Eugene Simon, Ann. Soc. Ent. Fr. (5) vii., Manilla. 
Mitopus biceps^ sp. n., T. Thorell, Bull. U. S. Geol. Surv. iii. p. 525, 
Colorado. 
PYONOGONIDBA. 
G. Cavan NA discusses the skin, and organs of digestion, respiration, 
circulation, and reproduction, in the Pycnogonid(A\ he states that the 
residuum of the food is evacuated by the mouth as well as the vent, and 
that the egg-bearing pairs of limbs are always present in the male, often 
really containing eggs, and sometimes more developed than in the female. 
Studii e ricerche sui Picnogonidi Firenze ; 1877, 19 pp., 2 pis. 
P. P. C. Hoek has also observed that in some cases the egg-bearing 
limbs are present in the males and wanting in the females. In Nyinphon 
he has observed a suprapharyngeal and five abdominal ganglions; in 
Pycnogonum only four abdominal ganglions. No heart could be found. 
Niederl. Arch. Zool. iii. [1876] pp. 235-255, pis. xv. & xvi. 
Nymphon Mr tarn (Fabr. ?) = Mrsutum^ Sabine, = Mrtipes^ Bell, wdth 
var. n. obtusidigitam, and stroimi, Kroyer, Grinnell Land, 82® N. lat. ; E. 
J. Miers, Ann. N. H. (4) xx. pp. 108 & 109 (the new var. figured, pi. iv. 
fig. 3). N. gracile, Leach, from Spitzbergen ; id. op. cit. xix. p. 140. 
Nymphum [-ow] imperfectum^ sp. n. (Chiereghiui, MS.) ; G. D. Nardo, 
Annotazioni illustranti cinquanta-quattro specie di Crostacei ; Mem. 
1st. Tenet, xiv. [1869] (also separately, 4to, pp. 1'27, 4 pis.). 
XiphocMlm [Bleeker, Pisces^ 1856], g. n., founded on an old drawing 
by Ohiereghini ; for X. spurius, sp. n. (Chiereghini, MS.) : id. 1. c. p. 119^ 
pi. iv. fig. 1. 
Demophanus, g. n., founded on an old drawing by Chiereghini ; for Z). 
falsus^ sp. u. (Chiereghini, MS.) : id. 1. c. p. 120, pi. iv. fig. 2, Adriatic. 
[Probably a Pycnogonum^ though drawn with only three pairs of feet.] 
AOARIDEA. 
Hoplopini. 
Under this name, G. Oanestrini & F. Fanzago, Atti 1st. Tenet. (5) iii. 
p. 481, propose the erection of a new family of Acaridea^ connecting that 
group with the Opilionidcc, and for the reception of Cceculus ecMnipes^ 
Duf., the generic name of which is changed to Hoplopus (p. 480), 
as it possesses evident eyes. A general discussion of the animal and its 
affinities is given, pp. 477-481. 
Canestrini, G., & Fanzago, F. Nuovi Acari Italiani. 2a. serie. Atti 
Soc. Pad. V. [not seen by the liecorder]. 
Kramer, P. Grundziige zur Systematik der Milben. Arch. f. Nat. 
xliii. pp. 215-247. 
The author separates the Mites into two great divisions, Acavina tra- 
