176 
MOLLUSCOIDA. 
DiSCINIDiE. 
Morse recapitulates his observations on the early stages of Disdna ; Ajn. 
Nat. iv. p. 493. 
Ball (Bull. Mus. C. Z. iii. pp. 86-42) gives a systematic revision of this 
family, which contains several (mostly fossil) genera and suhgenera. The 
recent species are enumerated as follows: — Discina (subgenus Discind) 
striata (Schumacher) = radiosa (Gould) = evansi (Davids.) = ostreoides 
(L&m.) Orbicula norvegica (Sow.), Africa ; stella (Gould), Indian Ocean: 
Discina (subgenus Diseinisca) lamellosa (Brod.), Peru; tenuis (Sow., nec 
Reeve), locality unknown; Icevis (^ow.). Chili; cumingi (Brod.), California, 
Panama; antillamm (Orb.), Cuba, Martinique; atlantica (Jeffr. MS.), NE, 
Atlantic. 
Discina stella (Gould), Japan, described and figured by Davidson, 1. c. 
p. 311, pi, 80. fig. 6. 
CRANIIDiE. 
Dall (1. c. pp. 25-36, pi. 1. fig. 7) publishes a systematic revision of this 
family, characterizing a new (fossil) genus, Cra7ii$cu$, and a new subgenus, 
Cranopsis. The recent species are enumerated as follows: — C. suessi 
(Reeve), Sydney; C. rostrata (Honinghaus), Mediterranean; C, (?? Ci'anop- 
sis) japonica (A. Ad.), Japan ; and C. anomala (Miill.), with many synonyms, 
turhmata (Poli), from the European seas, being regarded as a var., and a new(?) 
variety, pourtalesi, from Florida. 
Crania japonica (A. Adams) described and figured by Davidson, /. c. 
p. 311, pi. 30. fig. 6. 
Lingulidas. 
Lingula tumidula (Reeve), smaragdina (A. Ad.), dumoi'tieri (Nyst, 1843) = 
*aspidea (A. Ad., 1863), and lepidula (A. Ad.), Davidson, ibid. pp. 310 & 311, 
pi. 30. figs. 1-4, Japan. 
Lingula parva, sp. n.. Smith, P. Z. S. 1871, p. 730, Wydah. 
TUNICATA. 
Kowalewsky brings forward new observations on the early stages of 
the simple Ascidians in favour of his theory of their affinity to the Vertebrata. 
Arch. mikr. Anat. vii. p. 101, pis. 10-13. 
Donitz’s paper on the so-called chorda of the Ascidian larvae (Zool. Rec. vii. 
p. 184) is analyzed and discussed by an anonymous writer (under the initials 
N. N.) in Q. J. Micr. Sci. (2) xi. pp. 281-283. 
Molgtda pannosa, 7'etortiformis, littoralis, papillosa, and^/iVw/aris, Verrill, Am. 
J. Sc. (3) i. pp. 54-68, New England : spp. nn. 
Cynthia stellifera and pulchella, id. 1. c, pp. 93, 98, New England : spp. nn. 
Botrylbis stellatus (Gould, 7iec Pall.), from New England, is renamed youldi : 
id. 1. c. p. 212. 
Aiiiauroucium glabrwn, pellucubim, and stellatum, id. 1. c. pp. 288-292, New 
England : spp. nn, 
Mact'oclinuitif g. n.y = Aplidium, sect. 2, Saviguy. M. crater, sp. n., from 
banks of Newfoundland : id. 1. c. pp. 292-294, 
