MUSEUM OF COMPARATIVE ZOOLOGY. 137 



Glandina truncata, (;.mkmn. (p. 84.) 

 Found also in >sorth Carolina. 



Glandina Texasiana, Pfeiffek. (p. 87.) 

 Founil also in Lduisiana. 



Macrocylis Voyana, Newcomi?. (p. 0".) 

 A smaller variety dl' !) mm. greater diameter is I'uund at Los Angeles. 



Macrocylis Hemphilli, W. G. Bixn. 



Plate II. rijr. M. 



At Olympifi, Oregon, Mr. II. Hemphill collected several specimens of a 

 Macrocydis, which apj)ears to be distinct from, though nearly allied to, M. Van- 

 couvcrensis. It may l)e hest described by saying that 



The umbilicus is narrower and not excavated so much, the termination of 

 the last whorl not receding from the umbilicus as in all the forms nf I'diinm- 

 vercnsis and concam ; in all, the whorls are more or less strongly .striated with- 

 in the umbilicus, often almost ribbi'd iu concava ; not so in this shell ; the 

 te.xture of the shell is glassy like Ilijalina, and there is no trace of the micro- 

 scopic spiral lines found iu all the other forms ; beneath, the last wliorl is pro- 

 portionately wider. The greater diameter is 14 mm. ; lesser, 10; bright,.'). 



The jaw and lingual dentition aie as usual in the genus. I could not dis- 

 tinguish the characters of the central to(jth in this species. 



Zonites capnodes, W. G. Binx. (p. 98). 



ri.ate III. Fig. C. 



Living specimens received from near Knoxville, Tenn., through tlie kindness 

 of Mrs. George Andrews, have enatiled me to ligure the gi-nitalia. The genital 

 bladder (r/. h.) is large, globular, on a short, narrow duct : the ]K'nis-sac (/*. s.) 

 lias the same peculiar accessory process which I have detected in those of 

 Z. Irrvigatus, Ruqeli, f\dirjinoms, friahilis, and inornatus. There is a vaginal 

 in-epuce. 



It is in many individuals more easy to distinguish caimodcs from fidlijinosiis 

 by the dentition than by the shell. 



Zonites fuliginosus, Griff, (p. lon.) 



In a specimen from Indiana, sent me by Mr. F. Stein, I find the same acces- 

 sory process to the penis-sac noticed above. It is not given in Leidy's figure 

 in Vol. I. 



