CURRENT LITERATURE. I4I 



He is of opinion that in H. inbcrciilata there are two separate kidneys 

 right and left of the pericardium, which open externally by separate 

 apertures. The right kidney is the functional excretory organ. It com- 

 municates with the pericardium, and opening into it is the gonaduct. The 

 left kidney, which does not communicate with the pericardium, is partly de- 

 generating into lymphatic tissue, and is becoming connected with the efferent 

 branchial vein by direct blood-channels. Practically the large anterior lobe of 

 the right kidney, is an accessory genital organ in posse, and the external opening 

 of the right kidney is evidently becoming a genital pore. This being so, the 

 functional kidney must find an exit for its excretory products, and it seems 

 probable that this is provided for by the external opening of the left kidney, 

 which would thus be the homologue of the Monotocardian excretory aperture. 



Mr. Fleure then discusses the views of various workers upon the deriva- 

 tion of the accessory reproductive organs of the Taenioglossa, and of their 

 descendants the Opisthobranchs and Pulmonates, and the bearing of his 

 investigations upon the same. 



Hensgen, C. — Biometrische Untersuchungen tiber die Spielarten von Helix 



neinoralis. Biometrika, 1902, vol. i, pp. 468 — 492, with 3 maps and 10 



figs. 



The author has made an elaborate study on the distribution of the markings 



on the shell of Helix neinoralis found in the ditches and ramparts of the old 



Strasburg fortifications, which illustrates the influence of segregation and 



environment. Statistics of the markings prove that many mathematically 



possible combinations are not necessarily represented in nature. The basis is 



laid for further biometric work on other local races of this species, and for 



observing on captive individuals the laws of inheritance in the shell markings 



thus classified. 



Hedley, Charles.— Scientific Results of the Trawling Expedition of H.M.C.S. 



"Thetis." — Mollusca, pt. i. Mem. Aust. Mus., 1902, vol. iv, pp. 287—324, 



figs. 39—60. 

 In the present report the author treats of the Brachiopoda and Pelecypoda 

 obtained on this expedition, four species are recorded of the former phylum 

 and sixty-four of the latter. Among the Pelecypoda two new genera are 

 described, viz., Pronucula, which differs from Nucitla in the character of the 

 hinge and in the possession of a more prominent radial sculpture (type 

 P. decorosa, n. sp.), and Ciina, a genus of the Crassatellitidae, embracing C. 

 concentrica, n. sp., the type, Kellia atkinsoni, T. Woods, Carditella delta, Tate and 

 May, etc. Cyrilla dalli, n. sp., and Condylocardia frojecta, n. sp., add two new 

 genera to the Australian fauna. There are thirteen other new species described 

 and figured. 



Hedley, Charles.— A new Australian Volute. Rec. Aust. Mus., 1902, vol. iv, 

 p. 309, fig. 23. 

 Volnta perflicata, n. sp., allied to V. thatcheri, McCoy. 



Hedley, C. — studies on Australian Mollusca. Pt. vi. Proc. Linn. Soc , N.S.W., 

 1902, pp. I — 29, pis, i — iii. 

 Continuing this important series of papers Mr. Hedley describes as new 

 Bornia filosa, Con^eria Innata, ^. genus nevs; to the Australian fauna, Mactra 

 parkesiana, Pyrgulina perspectiva, P. senex, P. zea, P. umeralis, Crossea 

 biconica, C. gatlilp, Teniostoma involnta, Liotia corona, L. incidata, and Mecol- 



