34 Orust. 
CRUSTACEA. 
segments ; genital opening in the second thoracic segment. Vogt, Mem. 
Inst. Genev. xiii. Notes on the same by Ttichiardi, 1. c. p. 14. 
Sphcerifer (Sphcurosoma^ Leidig) leydigi, sp. n., Richiardi, Atti Soc. 
Tosc. iii. pp. 10-13, pi. yi. figs. 6-8, Mediterranean, in the frontal sinus 
of Umbrina cirrosa, with its Nauplius-stage described. 
OnONDRACANTHlDiE. 
Chondr acanthus cornutus (Miill.), zei (Guer.), and gihhosus (Kroy.) dis- 
cussed, the first resembling the younger stages of the two latter ; eye 
present in the male, wanting in the female ; a distinct vent ; intestine of C. 
zei provided with branched coeca which extend into the cutaneous appen- 
dages. They do not feed upon the blood but on the slime of fishes, and 
the fixation on the gills serves chiefiy for securing a constantly renewed 
current of water to the eggs of the parasite. Certain resemblances 
between Chondr acanthus and the Ergasilidce are pointed out. Vogt, 
Mem. Inst. Genev. xiii. 
Lern^id^e. 
Pemiella halccnopterm^ sp. n., Koren & Danielssen, Fauna Littoralis Nor^ 
vegiee, pt. iii. pp. 157-163, pi. xvi. figs. 1-9, attached to a Balccnoptera 
rostrata (Fabr.) = Pterobalccna minor (Eschr.), on the coast of Norway, 
associated with Conchoderma virgatum (Spengler). 
The larva and female of a Lernccid, probably Pennella varians (Steenstr. 
& Liitk.), found on the gills of Sejna, Eledone, and Loligo, at Trieste, 
described by A. Wierzejski, Z. wiss. Zool. xxix. pp. 662-674, pis. xxxii. & 
xxxiii. 
Leniccenicus (Lesueur, 1821) = Lerncconema (M. E., 1840), all species 
enumerated, L. vorax on Umbrina cirrosa, and L. neglectus, spp. nn., on 
various species of Mugil, Mediterranean ; Richiardi, Atti Soc. Tosc. iii. 
(separate print, pp. 1-13), pi. vii. figs. 1-43. 
Peroderma (Heller, 1865) = Taphrobia (Cornalia). Generic characters 
thus amended : “ Corpus elongatum, versus partem anteriorem processu 
lateral! instructum, collum efformans, ad apicem caput globosum tubulis 
ramosis copiose praeditum, infra cum ore rostriformi et pedibus abdomin- 
alibus. Pedes abdominales primi et secundi paris bene evoluti, biremes, 
tertii paris uniremes, remis biarticulatis ciliatis. Fila ovigera longissima 
attenuata.” Male unknown. P. cylindricum (Heller) = T. pilchardi 
(Cornalia) on sardines, Clupea pilchardus^ in the Mediterranean. 
Richiardi, Atti Soc. Tosc. ii. fasc. 2 (separate print, pp. 1-7), pi. vi. 
figs. 1-3. 
LERN^OPODIDiE. 
General notes on the knowledge of this family, and comparative descrip- 
tion of their limbs, viz., two pairs of antennce, one pair of mandibles, one 
