CEPHALOPODA, PTEROPODA. Moll, 39 
Architeuthis megajitera, sp. n., Verrill, op, ciL xvi. [1878], p. 207, 
Halifax, 43 inches : Tryon, Manual, i. p. 187. 
Mouchezia^ new generic name for the gigantic Cephalopod from the 
Island St. Paul [Zool. Rec. xiv. Moll. p. 28] ; no sufficiently distinctive 
character given ; Vdlain, Arch. Z. exper. vi. [1877] p. 83. 
MvOPSIDiE. 
Sepiola leiicoptera, sp. n., Verrill, 1. e. xvi. p. 378, Gulf of Maine. 
Immature state, genus uncertain ; Tryon, Manual, i. p. 168. 
Rossia liyatli and subltvvis, spp. nn., Verrill, 1. c. pp. 208 & 209, Massa- 
chusetts Bay ; Tryon, Manual, i. pp. ICO & IGl. 
Spirula aiietralis (Lam.), anatomically described by R. Owen. Its 
faculty of retrograde natation by the funnel and the basal web of the 
arms is higher than in Nautilus^ but lower than in other Dibranchiates ; 
Rumph's assertion that it ‘‘ hangs to the rocks by a thin and small door ” 
[I'ccte spine, in Dutch “ dooren ”] may mean by the terminal suctorial 
disk, and only temporarily. The retractors of the funnel and of the 
head arise from the circumference of the terminal part of the inner 
surface of the last chamber, as in Nautilus ; the siphon is ventral and 
entomarginal. Ann. N. H. (6) iii. pp. 1-16, pis. i.-iii. ; abstract in Arch. 
Z. exper.' viii. pp. xx.-xxiii., xlv. & xlvi. 
Spirula, from a depth of 950 fathoms, in the West Indies ; Al. Agassiz, 
Bull. Mus. C. Z. V. No. 14, p. 298. 
TBTBABUANGIIIATA. 
Nautilus ambiguus (Sow.), Cape Greenville, N. Australia, and stenom- 
plialus (Sow.), Darnley Island, Torres Straits, and Aneiteum, New 
Hebrides ; Brazier, P. Linn. Soc. N. S. W. ii. pp. 143 & 144. 
PTEROPODA. 
Lacaze-Dutiiieus’s treatise on the development of the Pteropoda^ 
the chief contents of which are indicated in Zool. Rec. xii. p. 137, is pub- 
lished in Arch. Z. exp^r. iv. [1875], pp. 1-214, pis. i.-xi. The genera 
which have been the subject of his observations are Cavolinia {Hyalcea)^ 
Hyalocylis (infra), Cleodora, Cymbulia, and Clio. 
Hyalcca. G. Pfeffer describes the finer sculpture of the shell in many 
species of this and the following genera, in which it is important for the 
distinction of species ; MB. Ak. Berl. 1879, pp. 231-240. 
IJyalcsa quadridentata, var. n. costata, Pfeffer, 1. c. p. 235, fig. 9, Indian 
Ocean. 
Pleuropus (Esch.) is distinguished from Hyalcea by the embryonal 
part of the shell being distinctly discernible also in the adult ; type, P. 
trispinosus (Lesueur, as Hyalcea') = Cleodora compressa (Souleyet), id. 
1. c. p. 236, fig. 6. 
