148 
REPORT ON ZOOLOGY, MDCCCXLII : 
O. tenebrosa, id. ; fusco-virente, dentibus lateralibus serrulatis, intiis 
violacea : from the same habitat. 
Corbicula fuscata, Benson, Ann. ix. p. 490; fusco-virente, polita, 
intus et ad nates violacea, margine interiori plerumque nigrescente ; 
extrinsecus sulcis crebris circumdata ; Chusan. 
Sanguinolaria iridescens, Benson, Ann. ix. p. 490 ; albida, exilissme 
transverse striata; latere postico subrostrato, subangulato, antico lon- 
giore, rotundato : Chusan. 
Psammabia costata, Hanley, from New Zealand. (Proc. p. 122.) 
Ps. decora, Hinds, Ann. x. p. 81 ; cinnamomeo-brunnea ; valva dextra 
planiuscula, sinistra ventricosa ; pallide violacea radiata ; intus violacea : 
California. Astarte globosa, Moller, 1. c. p. 20; triangular, bellied, 
minute vertical stripes ; yellow brown : Greenland. 
LoveU Reeve gives a monograph of the genus Crassatella, in which 
nineteen species are mentioned, ten of them new. (Proc. 1842, p. 42.) 
They are all figured in his Conchologia Systematica. 
Pandorina arenosa, Moller, 1. c. ; grey, with attached sand : Green- 
land. 
Solen acuminatus, Hanley, from the River Hoogley, in the East 
Indies. (Proc. p. 122.) 
Duvernoy’s treatise on the animal of the Ugulina rubra, which has 
been briefly noticed from the Institute in last year’s report, p. 404, has 
now appeared complete in the Annales des Sc. Natur. xviii. p. 110. 
Professor Owen lias published an account of the Anatomy 
of the Plioladomya Candida, in the Proc. Zool. Soc. 1842, 
p. 150. 
The animal exhibits the characters of the Acephala inclusa, being 
completely veiled in the cloak, which gives issue only to the siphonic 
tube and the foot ; it presents, however, in addition to the pedal and the 
two siphonic apertures, a fourth orifice, at the under part of the siphon, 
which is of small size and circular form, and which appears to be a 
supplementary entrance for water to the branchiae. This animal is dis- 
tinguished from Panopcea australis, not only by an accessory bifurcate 
foot, but also by -its undivided branchiae. 
Thracia incequalis, Adams, Sillim. Amer. Journ. xlii. p. 145 ; Ann. x. 
p. 238; fragile, very inequivalved, striated, inequilateral, posteriorly 
truncated ; left valve flat, right very convex ; ossiculum lunate, semi- 
circular ; 1' 2". Th. myopsis. Beck in Moller, 1. c. ; the latter doubts 
whether the species belongs to the genus Thracia, 
The first number of the Magas, de Zoologie, 1842, contains 
a Treatise, by Frederic Cailliaud, on the genus Clavagella. 
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