VERONICELLA. 243 



specimen examined, attached to its bottom, a narrow, cylindroid organ, which 

 probably may have been an uncalcified dart. 



The tube formed by the prepuce and the duct of the multifid vesicle, as 

 previously mentioned, opens exteriorly immediately beneath the mouth. The 

 ovary is small and unusually lobulated. The oviduct is a narrow, cylindrical 

 tube, which winds forwards and then back again so as to form a double spiral, 

 after which it makes a curve downwards, and is joined by the duct of the 

 generative bladder. The latter organ is globular ; its duct is short, gradually 

 increases in breadth, and is spirally twisted. From the duct, as previously 

 mentioned, passes a small offset to the vas deferens. * The common duct of the 

 bladder and oviduct, or vagina, is cylindrical, and just before terminating, is 

 joined by a short, wide tube, derived from a large, oval sac, which is filled with 

 a delicate, reticulated substance. This sac is peculiar to Veronicella ; its use 

 is problematical. 



The position of the female orifice of generation has been already stated. 



Veronicella olivacea, STEARNS. 



Animal elongated-oval, slug-shaped, sides moderately curved, ends obtusely 

 rounded ; substance (in alcohol) coriaceous, back convex and granulously 

 rugose ; color olive beneath, darker olive above ; length of body nearly four 

 times its width ; foot linear, not quite as long as, and one third the width of, 

 the body ; eye-peduncles short, annulated, with rather obscure stumpy (bifur- 

 cate ?) tentacles below. 



Length of largest specimen, 1.74 inches. Breadth of largest specimen, .51 

 inch. 



Habitat : Nicaragua (Occidental department), where several specimens were 

 collected by Mr. J. A. McNiel. This species is found also in the Upper Cali- 

 fornian Province, a specimen having been collected by me near Lobitos, in the 

 year 1866. 



My collection contains three specimens, and the Museum of the Peabody 

 Academy of Science, at Salem, Massachusetts, numerous examples of this 

 species. In connection with the above measurements, it should be borne in 

 mind that the contraction caused by the alcohol materially affects the propor- 

 tions ; the animal, when alive, is undoubtedly very much longer, and somewhat 

 broader, than above stated. 



The few species known inhabit tropical or semi-tropical climates ; the form 

 above described is quite distinct from V. Floridana, which is also found in 

 Nicaragua (Eastern department), where it was collected " under stones, Javate, 

 Chontales; probably the same species, but twice the size of Toro Rapids." 

 Vide paper " On the Land and Fresh- Water Shells of Nicaragua, by Ralph 

 Tate," in American Journal of Conchology, Vol. V. pp. 151 - 162. The 

 "Toro Rapids" specimens of Mr. Tate's collection possibly belong to the 

 species herein described, but it is hardly probable that the well-marked differ- 

 ences between the latter and V. Floridana could have escaped detection. 



