GEOGRAPHIC DISTRIBUTION. XXV11 



The SiphonodentaliidcK are as follows : 

 Siphonodentalium eboracense, p. 140. 

 Cadulus (Dischides) prionotus, p. 146. 

 Cadulus simillimus, p. 182. 

 Cadulus ? Isevis, p. 195. 

 Cadulus viperidens, p. 184 (Loyalty Is,). 



Pacific species. 



Eastward from the region last treated the known species are few, 

 part being shore forms, part deep water species. None of these have 

 occurred elsewhere, and no other species are yet known from this 

 area. 



D. diarrhox, p. 109. Northeast from New Zealand, 700 fms. 

 D. acutissimum, p. 94. North of Papua, 1,070 fms. and mid-Pacific 



east of Japan, 2,050 fms. 

 D. tornatum, p. 121. Levuku, Fiji, 12 fms. 

 D. complexum, p. 76. Off Honolulu, 295 fms. 

 D. phaneum, p, 59. Off Honolulu, 298-357 fms. 

 D. ceras, p. 68. Mid-Pacific, east of Japan in 2,050, and west of 



Valparaiso in 2,160 fms. 



Cadulus (Dischides) belcheri, p. 145. North Pacific. 

 C. (D.) dichelus, p. 145. Levuku, Fiji, 12 fms. 

 C. honoluluensis, p. 185. Off Honolulu, 40 fms. 

 C. colubridens, p. 184. Northeast from New Zealand, 700 fms. 



Australian Province : New South Wales to South Australia and 

 Tasmania. 



Five species of Dentalium and one Cadulus (C. acuminatus, p. 

 183) are known from this coast, to which a sixth may be added, D. 

 leptosceles, from lat. 42 42' S., south of Australia, in 2,600 fms. 

 The others are from inconsiderable depths. None of them have 

 occurred elsewhere. The " D. octagonum " reported by Angas was 

 apparently an incorrect identification, and D. novcehollandice has 

 not been found by Australian naturalists. 



a. Shell longitudinally ribbed. 



b. Equally 8-ribbed, intervals often subcostate ; length 10'5 

 mill., tasmaniense, p. 9. 



b'. Obsoletely equally ribbed ; length 10 mill., 



weldianum, p. 9. 



