390 PROCKEDINGS OF THE MALACOLOGICAL SOCIETY. 



Lieut. -Colonel Godwin-Austen,' wlio suggested retaining the Pacific 

 Island shells in tliat genus. With regard to conicoides, he stated that 

 the animal belongs certaiidy to tlieZonitidje, ^liJllendorff subsequently* 

 came to the conclusion tluit another name was available for the group 

 of conicoides, i.e. I)e7idrotrockm, proposed by Professor Pilsbry as 

 a sub-genus of Papuina for [felix helicinoides and its allies, which 

 Mr. Hedley has proved,^ however, to have affinity, not with Papuina, 

 but witli Trochomorpha. Under these circumstances I tliink we are 

 justihud in retaining the genus Trochonanina, taking T. SchmeU%iana 

 as the type, and in giving a new designation to tlie group of conicoides, 

 from which I propose to dissociate conus and mnUicari^iata. 



EuEYBAsrs, nov. gen. 



Shell conoid or depressed conoid, imperforate, whorls increasing 

 slowly ; upper surface striated, generally with a few spiral lirse near 

 the lower suture, but in some species the whole surface is spirally 

 decussated ; base finely striated, more or less excavated round the 

 umbilicus. The margins of the aperture slightly thickened and 

 reflexed. 



Type, Helix conicoides, Mete. 



The genus appears to have its centre of distribution in Borneo, 

 twelve species being known from that island, wliile a single species 

 is recorded from the Malay Peninsula, and another, referred to the 

 genus with some doubt, occurs in Celebes. 



Chiroktisma, nov. gen.'' 



Shell trochiform, imperforate, whorls flattened ; upper surface 

 covered with numerous raised spiral liroe ; lower surface shining, finely 

 striated transversel}' ; margins of aperture acute, not reflexed. 



Type, Helix conus, Phil. 



H. mult i car inata, 0. Boettger, is cogeueric. The genus appears 

 restricted to Java. The type much resembles Trochomorpha coniformis, 

 Fer., except in the imperforate umbilicus. 



Tegcmen,* nov. gen. 



Shell trochoid, narrowly umbilicated, spire concave ; whorls flattened, 

 strongly ribbed above, finely striated below, the strise crossed by 

 close microscopic spirals ; acutely carinated, the keel pinched. 



Type, Helix pefasus-chifiensis, Heude. 



This species, from the valley of the Blue River, Southern China, 

 does not appear to assimilate with any other species known to me. 

 The genus may provisionally be placed with the two preceding in 

 Ariophantinai. 



The next group comprises a number of species from the Marquesas, 

 the Friendly, and the Society Islands, some of which have been 



1 Proc. Malac. Soc. Lend., vol. i, p. 283, 1895. 



- Nacbr. Deutsch. Malak. Ges., 1897, p. 5. 



^ Records Australian Museum, vol. ii, p. 90, 1893. 



■* x^'P and KTisfj.a, a liand-ereation, suggesting engine-turning. 



^ A covering, in allusion to the hat-like shape. 



