BULIMULUS. XXIX 



Subgenus BUKIMULUS (restricted). 



Man. Conch, xi, p. 35. Type B. guadaliipenris Brug. Includes 

 Leptomenis Albers 



The shell is rather small, brown or corneous-brown, rarely with a 

 few wide bands ; lip and columella simple. 



The kidney is as long as the pericardium, and triangular. The 

 venation of the lung is chiefly on the intestinal side, and is faint ex- 

 cept for the pulmonary vein, which has no large branches (pi. 53, 

 fig. 31, B. ffiiadalupensis. The figure is diagrammatic and the veins 

 on the cardiac side are represented too strong). 



Genilalia (pi. 52, fig. 24, B. guadalupensis, form acutus Leach, 

 from Guadalupe) characterized by the long and very much twisted 

 penis, and tin- spermathecal duct, which is shorter than in other 

 groups of Bulinmlince, and inserted upon the, atrium, there being no 

 vagina. Other organs as usual. In a Porto Rican form identified as 



O O 



fraterculus, Pt'etter found the penis only moderately contorted and 

 the spermathecal duct very long (Beitrage, v, p. 56). This agrees 

 with Fischer's dissection of a specimen of gnadulupensis from Pointe- 

 a-Pitre (pi. 59, tig. 3) in which the duct of the spermatheca is very 

 long. The penis is apparently provided with a flagellum, figured 

 but not mentioned by Fischer. No flagellum is mentioned by 

 Semper, who dissected a specimen from Barbados, and I think it 

 undoubtedly a mistake. 



The jaw is ot the vertically plaited type, with 15-18 plaits, not 

 converging in the middle. Radula characterized by tricuspid central 

 teeth, the middle cusp very long, reaching over the margin of the 

 basal plate. Laterals bicuspid (pi. 57, fig. 63, B. limnoides, after 

 Binney). 



Antillean Species. 



B. guadalupensis Brug., xiv, 143. B. nichollsi A. D. B., xi, 40. 



H. exih's Gmel., xi, 37. B. riisei Pfr., xi, 41. 



B. acutus Leach. B. lehmanni Pfr., xi, 42. 



B. trifasciatus Leach. B. limnoides Fer., xi, 42. 

 B. rubrifasciatus Rve. lymnoides Rve. 



B. simplex Beck. Hnmseoides Alb. 



(?) B. antiguensis Gldg., B. chrysalis Pfr., xi, 43. 



Swains. B. semicinctus Pils., xi, 44. 



v. eyriesii Drou., xi, 39, 320. B. Iherminieri Fisch., xi, 44. 



fraterculusnuct.jxiv, 143. B. houelmontensis Cr., xi, 45. 



