xxx j v BULIMULUS. 



B. jacobi Sowb., xi, 1 1 1 ; xiv, B. simrothi Reib., xi, 1 1 7. 



151 tortuganus Dall. 



(?) avellana Beck. B. bauri Dall, xi, 118. 



v. pallidus Reib., xi, 112. B. amastroides Anc., xi, 118. 



v. cinereus Reib., xi, 112. B. curtus Reib., xi, 119. 



vermiculatus Dall. anceyi Dall. 



B. olla Dall, xi, 113. B. canaliferus Reib., xi, 119. 



jacobi Rve. B. sculpturatus Pfr., xi, 120. 



B. tanneri Dall, xi, 113; xiv, B. rugiferus Sowb., xi, 121. 



152. B. nesioticus Dall, xi, 122. 



fanneri Dall. B. reibischi Dall, xi, 122. 

 B/duncanus Dall, xi, 114; xiv, B. indefatigabilis Dall, xiv, 152. 



152. B. habeli Stearns, xi, 123. 

 B. darwini Pfr., xi, 115. terebra Reib. 



manini Cpr. B. chemnitzioides Forbes, xi, 

 B. wolfi Reib., xi, 115. 124. 



B. hoodensis Dall, xiv, 151. lima Reib. 



B. unifasciatus Sowb.. xi, 116. 



Section Orthotomium Crosse and Fischer. 



Manual xi, p. 125. 



The mantle has two short, widely separated lobes, with another 

 near the anal orifice (pi. 53, fig. 32, B. montezuma). 



The kidney and lung are as usual in the subfamily; the venation 

 of the latter being confined to the area between the last fold of the 

 gut and the pulmonary vein, and ante'riorly on the cardiac side as 

 far as the first branch of the vena cava. Elsewhere the venation is 

 very slightly developed (pi. 53, fig. 30, B. dealbatus ; fig. 33, B. 

 montezuma^ both double natural size). 



The muscles are as usual in the family (pi. 54, fig. 39, B. deal- 

 batus}. 



Genitalia. The long penis ig moderately twisted, bears the 

 retractor muscle at the apex, the vas deferens at or near it, and is 

 encircled by a muscular sheath at the base. The vagina is 

 moderately long ; the spermatheca oval or globose, on a duct fully as 

 long as the oviduct (pi. 52, fig. 23, B. dealbatus; fig. 25, B. monte- 

 zuma, double natural size; fig. 28, B. pallidwr y three times natural 

 size). 



The jaw is arcuate, bearing flat plaits which do not imbricate, and 



