XVI 



GEOGRAPHIC DISTRIBUTION. 



of so many species, all of the Scaphopods common to East and 

 West Atlantic are essentially deep water species. The Antalis 

 group is largely special to European seas, having but few West 

 Atlantic representatives. The polygonal typical Dentalia, and the 

 subgenera Graptacme and Compressidens, are West Atlantic groups 

 not represented in the Eastern Atlantic or Mediterranean. The 

 Polyschides group of Cadulus, well represented in the earlier Ter- 

 tiary, has not yet occurred in the recent northeastern Atlantic 



fauna. 



D. vulgare, p. 41, 0-543 fms. 



*D. entalis, p. 42, 3-1,750 fms. 



*D. agile, p. 46, 400-1,785 fms. 



*D. occidentale, p. 47, 50-1000. 



D. senigmaticum, p. 49,640-1000. 



D. novemcostatum, p. 51. 



D. insequicostatum, p. 52. 



D. dentalis, p. 53. 



D. panormum, p. 54, 0-195 fms. 



D. senegalense, p. 55. 



D. concinnum, p. 250, 150 fms. 



(Fissidentalium) . 

 D. milneedwardsi, p. 75, 800. 

 D. seraivestitum, p. 75, 500. 

 D. exuberans, p. 78, 700-2,062. 



D. scamnatum, p. 79, 700 fms. 

 *D. candidum, p. 72/410-1,750. 

 *D. capillosum, p. 77, 100-1,785. 

 D. rectum, p. 252, deep sea. 

 (Lcevidentaliwn, etc.) 

 D. caudani, p. 104, 730 fms. 

 D. rubescens, p. 105, 2-40 fms. 

 D. siculum, p. 107. 

 D. tenuifissum, p. 129. 

 (Episiphon.) 

 *D. filum, p. 118, 



(Bathoxiphus.) 

 *D. ensiculus, p. 121. 



(Heteroschisma.) 



*D. subterfissum, p. 61. 

 D. ergasticum, p. 74, 226-1,073. 



Entalina quinquangularis, p. 132 



*Siphonodentalium lobatum. 



*S. lofotense, p. 138. 



S. teres, p. 138. 



*S.'affine, p. 140. 



S. pusillum, p. 140. 



Cadulus (Dischides) politus. 



C. ovulum, p. 156. 



C. cyathus, p. 156. 



*C. amphora, p. 161. 



C. subfusiformis, p. 163. 



Western Atlantic and Gulf of Mexico. 



About 66 species, equally divided between the families Dentaliidce 

 and Siphonodentaliidw are known ; 15, or about 23 per cent, are 

 common to the East and West Atlantic. The typical Dentalia of 



C- gibbus, p. 159. 

 *C. tumidosus, p. 160. 

 *C. jeffreysi, p. 164. 

 *C. gracilis, p. 165. 

 C. propinquus, p. 166. 

 C. cylindratus, p. 166. 

 C. senegalensis, p. 176. 

 C. strangulatus, p. 176. 

 C. monterosatoi, p. 177. 

 C. artatus, p. 177. 



