MQLLUSCA. 
239 
Rhegistoma amhiguum, Semper, Proc. Zool. Soc. 1864, p. 261, from Luzon. 
Licina ? percrassa, Pfeiffer, Mai. IBlatfc. p. 167, Cuba. The author adds a 
short review of the present state of our knowledge of the genus Licina. 
Cyclostoma ( ChoanopomcL) lorighti, Pfeiffer, Mai. Blatt. p. 102, from Cuba, 
allied to Cli. Tiystrix. 
Choanopoma troscheliy Pfeiffer, ibid. p. 103, from Cuba. 
Ctcnopoma pulverulentuniy Wright, Mai. Blatt. p. 103, from Cuba. 
Ctenopoma? hiifo, Pfeiffer, ibid. p. 104, from Cuba. 
Adamsiella aripcnsis, Lechmere Guppy, Ann. & Mag. Nat. Hist. 1864, xiv. 
p. 240, from Trinidad. 
Oloponia hinduorum, Blanford, Ann. & Mag. Nat. Hist. 1834, xiii. p. 464j[ 
from Kattiwur, Western ludia. 
Cyclostomus romeri and C. heynemanni, Pfeiffer, Mai. Blatt. p. 105, from 
Cuba. 
Ciskda jimenoi (Arango), Pfeiffer, Mai. Blatt. p. 160, from Cuba. 
Pomatias. Catalogue des especes appartenant au genre Po- 
matias, et description d^une espece nouvelle, par M. H. Crosse. 
Journ. Conch, pp. 23-33. 
Twenty recent and two fossil species, the following being 
added to the fifteen species ennmerated in Pfeiffer^s Supplement 
(1858) : P. dalmatinus (Pfr. 1863), excisus (Mouss.), from Janina; 
hidalgoi, sp. n., p. 24, pi. 2. fig. 3, from Biscay; himalayce (Bens.), 
gnd ray anus (Bourg.) from North-western France. The range 
of the genus is now extended from the Himalayas through 
Southern and Central Europe to the Canary Islands. 
Pomatias turritus, Walderdorff, Verb. Zool. Bot. Ges. Wien, 1864, p. 611, 
from Southern Dalmatia and Montenegro. — Pomatias sahaudinus, Bour- 
guig-nat, Mai. d’Aix, p. 64, pi. 2. figs. 11-14, from Savoy. 
Pomatias apricus,lSi.o\xQ’s. sp. { = cai'thusianus, Dupuy) and P. septemspiralisy 
Ratzumowsky {-^maculatns, Drap. sp.) are figured by Bourguignat, Mai, de la 
Grande Chartreuse, pi. 8. figs. 13-20, and Mai. d’ Aix-les-Bains, pi. 2. figs. 16- 
22 (same figures). 
Poma^fasj;<?y?/ense, Theobald, Journ. As. Soc. Beng. 1864, p. 248, from Pegu. 
Pealia and Omplialotrcpis. On the affinity of these two genera and their 
difference from the true Jlydrocena see Martens, Malak. Blatt. pp. 142-144. 
The name Hydroceno. belongs originally to a Dalmatian species, named 
by Pfeiffer cattarcensis, which, by the callous basis of the shell, the Neri- 
tina-like process of its opercle, and the Trochoid structure of its radula is 
widely separated from Cyclostoma and much nearer to Ilelicina ; but the 
shells from the Eastern and Pacific archipelagos, also named Hydrocena,^ 
do not belong to this genus, but either to Pealia and Omplialotrcpis, or to 
Assiminea. 
Pealia producta and P. ahhreviata, Pease, Proc. Zool. Soc, 1864, pp. 673, 
674, Sandwich Islands ? 
Omphalotropis hicarinata, Martens, Monatsb. Acad. Wiss. Berl. 1864, p. 118, 
from Amboina j allied to O. ruhens (Q. & G.). 
