520 
ZOOLOGICAL LITERATURE. 
WiECHMANN*, C. M. DieAstarte der Ostsee. Archiv des Vereins 
der Freunde der Naturgeschichte in Meklenburg, xxiii. 
p. 192. 
Wood, W. The Clio borealis on the coast of Maine. Proc. 
Portland Soc. of Nat. Hist. i. part 2. 
The General Subject. 
A very good but popular account of the class Mollusca, chiefly 
with regard to their life-history and practical value for mankind, 
is contributed by Prof. Oscar Schmidt in A. E. Brehm^s ^11- 
lustrirtes Thierleben,' vol. vi. pp. 757-964, and illustrated by 
numerous woodcuts. A similar, somewhat shorter treatise is 
contained in C. Klotz^s ^ Leben und Eigenthiimlichkeiten in 
der niedern Thierwelt,' Leipzig, 1869-70, 8vo, pp. 1-154, also 
with numerous woodcuts. 
Anatomy and Physiology. 
- Rui). Berqh has made very detailed researches into the anatomy of 
Phyllidia varicosa. Naturh. Tidskr. Kjobenh. v. pp. 357-492. 
Stoliczka has examined the anatomy of Onchidium typhce. Journ. As. 
Soc. Beng. xxxviii. pp. 86-100, pi. 14. 
The sexual organs of Limncsa are the subject of a paper by H. Eisig. 
Zeitschr. wiss. Zool. xix. p. 297. 
The microscopical structure of the nerves of bivalves has been studied by 
Baudelot. Bull. Sc. Nat. Strasb. 1809, December. 
Panceri has published his observations on the secretion of sulphuric acid 
by a part of the salivary glands in some mollusks. Att. Acc. Napol. iv. 
No. 10 [see Zool. Record, v. pp. 452, 409]. 
0. A. White has ascertained that certain species of Unio are sensitive to 
light. The anal and branchial openings contract whenever light is suddenly 
withdrawn from the animal. — Is. Lea made experiments regarding the 
same subject several years ago, and found that some species gave no indica- 
tion as to sensitiveness to light, whilst others were particularly sensitive — for 
instance, Unio radiatus, — also that visual organs were placed on the fringes 
of the siphonal openings. Afterwards the sensitiveness has been ascertained 
in many other species — for example, U. I'uhiyinosus (Lea), cylindricus (Say), 
mbrotundu3 (T^ea), 2W^^ddatus (Lea), ohscurus (Lea), pustido$us (l.iea), 
acropus (Green), and Anodonta imhecillis (Sars). The females were more 
sensitive than the males. Silliman’s Am. Journ. of Science and Arts, 2nd 
series, vol. xvii. pp. 280 and 430 j Ann. & Mag. Nat. Hist. iii. pp. 399 and 
467. 
Monstrosities. 
Scalaroid specimens of Helix candidula (Stud.) are noticed by Dufft, 
Nachrichtsbl. mal. Gesellsch. i. p. 102, of Planorhis contortus (Miill.) by 
Walser, ibid. pp. 184, 185. 
* In the last volume of this Record, v. p. 431, Wiedemann is a misprint 
for Wiechmann. 
