18 
2. CiuementiA Moretonensis, Desh. C. testa ovato-subtri- 
gona, turgidula, inequilaterali, candida, opaca, calcarea, trans- 
versim irregulariter rugoso-striata, punctis confusis, irregulari- 
bus, dense aspersa; latere antico brevi, lato, obtuso, postico de- 
clivi, obtuso ; umbonibus acutis, prominulis, obliquis ; lunula de- 
pressa, ovato-oblonga, vie distincta; area profunda, levigata, 
angulo obtuso circumdata ; valvis tenuibus, fragilibus, intus can- 
didissimis ; sinu pallii maximo, trigono, basi late aperto, lateribus 
angulum fere rectum formantibus. 
Hab. Australia (Moreton Bay). Coll. Cuming. 
February 8, 1853. 
John Gould, Esq., F.R.S., in the Chair. 
The following papers were read. :— 
1. Descrirrions OF SOME New Species or ENTOZOA FROM 
THE COLLECTION OF THE British Museum. 
By W. Barrp, M.D., F.L.S. 
(Annulosa, Pl. XXX. XXXI.) 
Class Enrozoa. 
Order NEMATOIDEA. 
Family Ascarip&. 
Genus ASCARIS. 
1. ASCARIS SIMILIS. 
Ascaris similis, Baird, Cat. Entoz. Brit. Mus. 19. t. 1. f. 1. 
Head small; mouth with three small valves slightly projecting be- 
yond the margin. Anterior portion of body much narrower than 
posterior. Tail rounded, thick, obtuse. Females spirally twisted in 
many convolutions ; of a dark olive colour. Males straight to within 
a short distance of tail, which is inflected ; of a whitish colour. Skin 
of body minutely and finely striated across. Wing extending along 
the whole length and becoming thicker and stronger at inferior ex- 
tremity. Length of male 2 inches, breadth 1 line. Length of female 
13 inch, breadth 3 of a line. 
This species resembles the 4, osculata from the Phoca vitulina, 
but differs in having the wing stronger and thicker at inferior extre- 
mity, in having the head and mouth smaller, and in the skin of the 
body being finely striated across. 
Hab. Stomach of a Seal from Antarctic Seas ; collected during the 
late Antarctic expedition. Brit. Mus. 
