MOLLUSCA* I 
251 
Vancouver district ; J/. variegata, M, (? variegatay var.) nitons y M. ang\iXatay 
Carpenter, 1. c. pp. 394 & 395, Sta. Barbara, California ; M. hamata and 
cereay Carpenter, 1. c. pp. 399 & 400, Panama; 31. hexagonay Gabb, Proc. 
Calif. Acad. Nat. Sc. 18G5, California. 
Pleurotoma (Mangelid) nincentinay Crosse et Fischer, Journ. Conch, xiii, 
p. 422, pi. 11. fig. 6, South Australia. 
TEREBRIDiE. 
Terebra, The dentition of T. syhulata, macvlatay dhnidiata, 
muscaria, cuspidatay concinna, cmrulescens , cinereay jamaicensis, 
diiplicata, and lamarcldi has been described and figured by Tro- 
schel, 1. c.'y it proved to be of a very peculiar type. The species 
in which each whorl is divided into two portions by a spiral 
groove (disappearing sometimes on the last whorls) agree also in 
their dentition and are distinguished by the author by the 
generic name Acus (Humphrey). The divisions Myurella 
(Hinds) and Hastula (Adams) are adopted as genera. 
3Iyurella simplex, sp. n.. Carpenter, Ann. & Mag. Nat. Hist. xv. p. 395, 
California. 
CanCELLARIIDA5. 
Cancellaria. The dentition of C. crenifera (Sow.), examined 
some years ago by Troschel, is redescribed and figured (Gebiss 
d. Schneck.) ; the author maintains that this genus belongs to 
the I'oxoglossa, against M. Crossc^s objections in Journ. Con- 
chyl. 1863. 
Admete. Troschel proposes to separate this genus as a di- 
stinct family from Qancellarmy on account of its dentition, which 
he describes and figures (/. c.). He distinguishes two species, 
differing in their] dentition, — one with the spira more elevated, 
A. crispa (Mbller), and another with the spira shorter and with 
the mouth larger, A. viridula. 
Cancellaria modestay sp. n., Carpenter, Ann. & Mag. Nat. Hist. xv. p. 32, 
Neeah Bay, Vancouver district. 
Cancellaria {Narona) cooperii, sp. n., Gabb, Proc. Calif. Acad. Nat. Sc. 
1865, California. 
Suborder Rostrifera. 
CyPRtEIDJE. 
Cyprcca fiiscopunctata and candiday sp. n.. Pease, Proc. Zool. Soc. p. 515, 
Central Pacific ; C. rhinoceros, sp. n., Souverbie, Journ. Conch, xiii. p. 158, 
pi. 5. f. 1, New Caledonia ; C. thomasi, sp. n., Crosse, ibid. p. 57, pi. 6. f. 3. 
OvULIDiE (AmPHIPERASID^e) . 
Omdum. Thirty-nine species are figured in Reeve’s Conchologia Iconica j 
two are new: — O. fruticum (Ada>ms, MS.), fig. 16, Malacca ; O. alabaster , fig. 
23, Senegal. 
