44 Moll. 
MOLLUSCA. 
foreign colouring matters, and also suggests their use as vehicles for 
medicinal substances. 
The parts most strongly coloured in Clio are those most active in the 
vital economy of the organism ; Wagner, (373) pp. 113-115. 
Phosphorescence ; Giglioli & Issel, (138) pp. 93 & 109. Some instances 
in Mollusca recorded; McIntosh, (241); Hoyle, art. “Phosphorescence,” 
Encycl. Brit, xviii. pp. 813 & 814. 
12. Abnormalities. 
Deformities of the aperture of Physci acuta living in a warm chaly¬ 
beate spring ; Regelsperger (306). 
Abnormal spiral banding observed in certain species of land and fresh¬ 
water shells, by Cockerell, J. of Conch, iv. p. 374. 
Modes of Collecting and Preserving. 
Directions for obtaining marine Mollusca ; Daniel (99). 
Small bivalves placed in a groove beak upwards; Jeffery, J. of Conch, 
iv. p. 303. See also Reibisch (307). 
Bands of Helices , when apparently absent, sometimes become visible 
on weathering or treatment with hydrochloric acid ; Cockerell, Zool. 
(3) ix. p. 114. 
Paryphanta hochstetteri. Shell splintered into pieces by the heat in 
Australia ; Brazier, P. Linn. Soc. N. S. W. ix. p. 760. 
Nomenclature. 
Varietal nomenclature, Woodward (380) ; answered by Cockerell, 
Zool. (3) ix. p. 485 ; supported by Rowbotham, t. c. p. 486. 
Popular names of various Mollusks used by the fishermen of Brest ; 
Daniel (99). 
“Mutation” and “ variation” use of the words discussed by Foresti 
(134). 
GEOGRAPHICAL DISTRIBUTION * 
Land and Fresh-water Mollusca. 
I.—PALiEARCTIC ZONE. 
Westerlund (377) continues his account of this region, treating of 
the Succineidce, &c. 
1. Septentrional Region. 
British Isles. 
List of species and varieties new to; J. of Conch, iv. pp. v. & vi. 
Account of land and fresh-water shells, by counties, continued by 
* The Distributional Regions here adopted are those proposed in Fischer’s 
Manuel de Conchyliologie (123). 
