GASTROPODA. 
165 
Amphidromus maculiferus (Sow.), sinistralis (J^vQ.^^contrarius (Miill.), 
interruptus (Miill.), and atricallosus (Gould), anatomically examined: 
kidney, flagellum, and stalk of the bursa copulatrix elongate ; jaw feebly 
ribbed; rows of the radula oblique. A. chloris (Rve.) found only at 
Zamboanga, A. maculiferus (Sow.) in North and East Mindanao, Leyte, 
and Bohol ; Semper, Reis. Arch. Philippin. iii. pp. 14G-149, pis. xiv. 
flg. 1, xvi. figs. 20-22. BuUmus perversm (L.) : young specimens have 
a brown spiral band, which is lost in the adult ; Martens, in PfeiflEer’s 
Novitat. iv. pi. cxxviii. figs. 11 & 12. 
BuUmus. C. Semper, Reis. Arch. Philippin. iii; pp. 140-158, has studied 
the anatomy of several American and Australian species of different 
sub-genera, finding in all a very short kidney and very simple genital 
organs ; he classifies them, however, according to the structure of the 
jaw, in accordance with the Recorder’s view fZool. Rec. ix. pp. 165 & 170], 
in the following manner: — 
BuUmus (emend.) : jaw simple, with parallel ribs. Comprises the 
sub-genera Borus, Dryptus^ Pachyotus, Scutalus, and Plectostylus^ 
all South American. 
Bulimulus : jaw consisting of a few plates, the margins of which are 
slightly convergent, and partially united. Comprises the sub-genera 
Mesemhrinus and Thaumastus, both South American, and Liparus^ 
from Australia. 
Otostomus : jaw consisting of numerous narrow plates, the margins of 
which are very convergent, and sometimes united near the cutting 
edge. Comprises the sub-genera Otostomus., Pelecycliilus, Liostracus, 
and Mormus, all South American, and Placostylus and Charts, from 
the Melanesian islands. [For Bulimulus and Otostomus, see posted, 
pp. 171 & 172.] 
W. G. Binney also characterizes BuUmus proper by its marginal teeth 
being of the same type as the laterals ; Ann. Lyc. N. York, xi. p. 33. 
BuUmus {Borus) ohlongus (Miill.), genital organs, kidney, and radula ; 
Semper, 1. c. pis. xiv. fig. 10, xvi. fig. 25, xvii. fig. 1. B. nucleus (Orb.) 
from the southern part of the La Plata States ; Strobel, Malac. Argent. 
p. 20. 
BuUmus {Dryptus) marmoratus (Dkr.), radula, Binney, P. Ac. Philad. 
1874, p. 59, pi. vi. fig. 2; pardalis (F<5r.), jaw ribbed, id. ibid.; loveni 
(Pfr.) and blainvillianus (Pfr.), genital organs, Semper, 1. c. pi. xv. fig. 1, 
radula, pi. xvii. figs. 3 & 4. 
BuUmus {Eurytus) ampullaroides and suhglandiformis (Mouss.) ; 
Pfeiffer, Novitat. Conch, iv. pis. cxxix. figs. 1 & 2, cxxx. figs. 1 & 2. 
BuUmus {Orphnus) foveolatus (Reeve) and lianleyi (Pfr.), jaw and 
radula ; Binney, Ann. Lyc. N. York, xi. p. 39, pi. i. fig. 3, and P. Ac. 
Philad. 1874, p. 59, pi. vi. fig. 5. 
BuUmus {Pachyotus) egregius (Jay), radula; Binney, P. Ac, Philad. 
1874, pp. 54 & 68, pi. vi. fig. 1. The same species and hilahiatus (Brod.) 
examined by Sempei^ 1. c. p. 151. B. {P.) wallisianus (Mouss.) ; 
Pfeiffer, Novitat. iv. pi. cxxx. figs. 7 & 8. 
BuUmus {Pelecychilus)', see posted, p. 171.] 
BuUmus {Anthinus) multicolor (Rang), and {Macrodontes) odontostg- 
