184 PROCEEDINGS OP THE MALACOLOGICAL SOCIETY. 



lines of growth well marked, aperture fairly broad, the columella 

 twisted at the base. Long. 6, lat. 2-6 mm. 



"Porcupine" Expedition, Station 17. 



A long series. Recalling in shape the well-known S. modiolus, 

 Jan, but differing in sculpture. I have to thank M. Dautzenberg for 

 examining this shell, together with the bulk of the forms now 

 described. 



Spiroteopis modiolus (Jan). 

 Fusus modiolus, Jan: Cat. Conch. Foss., 1832, p. 10. . 

 Pleurotoma carinatum, Bivona, 1838. 

 Pleurotoma acuta, Bellardi. 

 Pleurotoma scalaris, Partsch, 1837. 

 Spirotropis modiola, Jan : Kobelt, p. 297 {vide references cited). 



"Porcupine" Expedition, 1869, Stations 1, 23a (live), 65; 1870, 

 Stations 16, 24, 30, 50, 56 ; Adventure Bank, 92 fathoms; off Cape 

 Sagres, 45-58 fathoms. 



Distribution. — From the Lofoten Islands to "West Africa, and in the 

 Mediterranean ; generally in fairly deep water. Fossil in the Miocene 

 and Pliocene of South Europe. 



A good series of this form, not usually of common occurrence. 



Spirotropis Monterosatoi (Locard). 

 Pleurotoma Monterosatoi, Locard : Exped. Scient. Trav. Talisman, 

 vol. i, p. 209, pi. ix, figs. 22-26. 

 "Porcupine" Expedition, 1870, Station 17. 

 Bistrihution. — Deep water, off Morocco (Locard). 

 Three very young specimens, in poor condition, which I refer here 

 with some slight doubt. 



Thesbia (?) MONOCEROS (Watson). 

 Pleurotoma {Thexhia'^) monoceros, Watson: Trans. Linn. Soc, vol. xv, 

 p. 449; Challenger Rep., Gasteropoda, p. 3^5, pi. xx, fig. 1. 

 "Porcupine" Expedition, 1870, Station 17. 

 Distribution. — Off Sierra Leone, in 2,500 fathoms. 

 Several young specimens and fragments, the identification of which 

 with Mr. Watson's form was suggested, with a query, by Mr. J. T. 

 Marshall. The unique type has lost its protoconch, and, while these 

 specimens may belong to the same form, it is impossible to speak with 

 certainty. 



Taranis Morchi (Malm). 

 Troplion il/orchi. Malm: Gotenborg Vet. Handl., 1863, p. 130. 

 Pleurotoma cirrata, Brugnone : Pleur. foss. Palermo, 1862, p. 17. 

 Non Pleurotoma cirrata, Bellardi : Mem. Ace. Torino, ser. ii, vol. ix 



(1847), p. 575. 

 Taranis cirrata, Brugnone : Kobelt, p. 323. 



"Porcupine" Expedition, 1870, Stations 3, 16, 17, 30; Adventure 

 Bank, 92 fathoms. 



Distribution. — From IS'orway to the Mediterranean and in deep 

 water in the Atlantic. I am not clear if the North American records 

 are to be relied upon. A Pliocene fossil in Southern Europe. 



