Horváth Géza (szerk.): A Magyar Természettudományi Múzeum évkönyve 7. (Budapest 1909)
Soós, L.: Anatomy and systematic position of Campylaea coerulans
VIL ANNALES MU SEI NATION ALIS HÜNGAEICL 1909. ANATOMY AND SYSTEMATIC POSITION OF ( 'AMPYLAEA ( '( )ERULANS. Bv Dr. L. Soós. (With 2 figures.I The question of the systematic position of Campy laeä coenilans C. PFK. has repeatedly formed a subject for discussion. For the purpose of deciding the matter I have examined the organs which are important in regard to the system, i. e. the jaw, the radula and the reproductive system. The result of my researches is as follows. I. Jaw. The jaw (iig. 1) is to be found in a groove behind the opening of the mouth, and is composed of two coalesced, thin, flexible. muscles being fastened to the two plates in the intervening place. It is well known that the jaw of the Campylaeae is always a thick, strong, scarcely flexible, dark-brown chitin-lath. upon which 4—11 ribs are to be found. The jaw of C. coenilans differs therefore considerably from that of the Campylaeae. '2. Rachcld. The radula of C. coenilans or rather its teeth are of a quite peculiar structure, and there is among the Hclieidae only one species which has such radula-teeth, i. e. Allognaihus Grateloupi GRAËLLS , as is known from the researches of SCHUBERTH. The teeth of the radula of C. coevulans are uniform in shape and they are narrow, strap-shaped, sicklelike curved backwards, and their ends are rounded off. The teeth are arranged in wavy-lines ; their number is not even approximately determinable though in any case there are many thousands. 3. Reproductive system. C. coerulans has genitalia of the Jaw of H. coervlam. Fig. 1. quite smooth, yellowish chitin-plates. The larger of this two plates is arcuated, while the smaller one is as it were a tongue-shaped appendix of the larger to which it is coalesced on the arcuated side. The other edge of the smaller plate curves freely back brimlike, and therefore inclines in the direction of the arcuated edge of the larger. These are the two gnawing edges. The motor-
