13 



NOTE OjST reproduction OF TURRITELLA, 

 By Lieut.-Col. A. J. Peile. 



Bead 11th November, 19S1. 



Becently, while breaking open specimens of Turritella gunnii, 

 E,eeve, for the purpose of obtaining radulae, the animal being 

 retracted far within the shell, it was found that two specimens 

 out of three contained fry. The number of young in the shell iv 

 which development was more advanced was about 70, having 

 about 4 whorls. 



The anatomy of T. communis, Risso, was described in the Society's 

 Proceedings, Vol. IV, p. 56, by Dr. W. B. Randies. There is no 

 definite evidence in that paper as to the reproductive habit of 

 T. communis, but it would appear possible that some of the 

 anatomical peculiarities there described may be connected with 

 a viviparous mode of reproduction. 



The specimens of T. gunnii examined were kindly supplied by 

 Mr. Tom Iredale from his Twofold Bay collection, which was 

 dredged by Mr. Roy Bell in 5 to 20 fathoms. 



Mr. Iredale informs me that since my discovery he has examined 

 some quantity of T. gunnii and found fry therein and that the 

 shells in which they are found are noticeably more swollen in contour 

 than those, presumably males, which he found barren. He also 

 informs me that examination of a number of specimens of an 

 unnamed species, referable to the section Col'pos'pira, from the same 

 locality has resulted in no success. 



SOME NOTES ON RADUL^. 



By Lieut.-Col. A, J. Peile. 



Read Wth November, 1921. 



I HAVE to acknowledge the kindness of the authorities of the 

 British Museum (Natural History), who have permitted me to 

 study the Gwatkin collection of radulse and to refer to the same in 

 this paper. 



I. Columbarium. 



G. Schacko, in Conchologische Mittheilungen, vol. ii, 1881, p. 122, 

 described and figured two teeth purporting to be from the radula 

 of C. spinicincta, von Martens (= pagodoides (Watson)), a species 

 having very close affinities with C. pagoda (Lesson). The teeth are 

 stated to resemble those of Defrancia ; as a result of this statement 

 the genus has been ascribed by von Martens and subsequent writers 

 to the family Twridce (Pleurotomidce) in the Toxoglossa. 



The Gwatkin collection contains a specimen of a complete radala 

 of C. pagoda, from wbich a figure is now given (Fig. 1). It has 



