MOLLUSCA. 
Ml 
lllSSOELLIbAJ. 
JECyala rotundata, Cai'penter^ Ann. & Mag. Nat. Hist. xiii. p. 478. Cape St. 
Lucas, California. 
Diala dectrinaj Carpenter, 1. c. j Cape St. Lucas, California. 
RiSSOIDiE. 
Fenclla. Mr. A. Adams has published a paper on the Animal and allinitieS 
of FeneUa, with a list of the species found in the Seas of Japan.” Ann. & Mag. 
Nat. Hist. xiii. pp, 39-41. It is a genus of Rissoidcn, with the shell turreted aft 
in Bittium and Cerithiunij hut not emarginate in front. Most of the species have 
been described by the author in the same journal (1860) under the generic 
name of Dimkeria. 
Fenella crystalUna, Carpenter, Ann. & Mag. Nat. Hist. xiii. p. 477. Cap^ 
St. Lucas, California. 
Rissoa. Ueber die Familie der Rissoiden. II. Rissoa/’ By 
G. Schwartz von Molirenstern. Denksclir* Acad. Wiss. Wien> 
xxiii. 1864, pp. 58, with 4 plates. 
The author gives the history and fixes the principal characters 
of this genus, paying attention to the soft parts as well as to the 
operculum ; then he proceeds to examine the affinities between 
the recent and fossil species, representing them by two schematic 
illustrations, in one of which it is shown that three types only 
of the tertiary period have branched off into the 30 recent 
species. However, the chief contents of this memoir are very 
exact descriptions of 47 species which are beautifully illustrated. 
The genus is retained with the same limits which have been 
assigned to it by Adams and others, the cancellated species 
{Alvania, Risso) being excluded and reserved for a future 
monograph, like the present one, and like that on Rissoina pul- 
lished by tlie same author some years ago. The recent specie^ 
are chiefly European : out of thirty-four, 27 (26) arc Mediter- 
ranean ; no tropical or Australian species is known at present^ 
the most southern locality in which they have been found being 
the Canary Islands. — This monograph is of great importance, 
and will be the standard work for subsequent researches. 
Bissoa ohscura (Phil.) —parva^ var. (Schwartz v. Mohrenst.). It so happens 
that the Recorder is able to point out one little mistake which occurs in the 
memoir just mentioned, with regard to this species, which is stated to in- 
habit the Mediterranean and Sicily (p. 25). Although Philippi named, 
described, and figured it in his well-known work on the Mollusks of that 
island, he was unacquainted with its habitat, placing it in a foot-note, as h6 
did the other exotic species recognized by him as new. Now the specimens 
described by Philippi were detected some years ago by Hr. Georg von MartenS 
and Mr. Benz among the Algoe collected at Biaritz in the Bay of Biscay by 
the late botanist Endress. The species proved to be very commoii there, atd 
the Becorder also found it afterwards on the coast of Norway; but among k 
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