Differs from A. Lorioli Koehler by its low test, which recalls that of Abatus cavernosus. The periproct is above ... [details]
Differs from U. naresianus in the configuration of the posterior end of the test; the periproct is just above the ... [details]
Differs considerably from the two other species in several respects. The labrum is not separated from the second ... [details]
This is the most extraordinary of the species of Pourtalesia hitherto known. It is nearly related to P. phiale, but ... [details]
Closely related to the Pacific species, P. cinctus A. Ag., from which it is, however, easily distinguished by the ... [details]
Lat. 53° 34' S. Long. 43° 23' W. 160 M. Lat. 54° 17' S. Long. 36° 28' W. 74 M. Off South Georgia. (Swedish ... [details]
Near the Antarctic Continent; 3423 Meter. (German South- Polar Expedition.) [details]
Lat. 53° 34' S. Long. 43° 23' W. (Shag Rocks Bank) 160 Meter. (Swedish South-Polar Expedition.) [details]
S. of Iceland. 843-912 fathoms. (‘Ingolf’-Expedition.) [details]
Northern Atlantic; Denmark Strait. c. 450-1300 fathoms. (‘Ingolf '-Expedition.) [details]
Northern Atlantic; Davis Strait. 845 - 1715 fathoms. (‘Ingolf’- Expedition) [details]
This is a large species like P. Jefreysi, from which it is easily distinguished by the shape of the test; it is ... [details]