i 74 DISCOVERY REPORTS 



St. WS 95. Between Falkland Is. and Patagonia, 48° 57' S, 64 45' W to 48 59' 30" S 64 45' W, 17 Apr. 1927, 



109-108 m. 

 St. WS 222. Between Falkland Is. and Patagonia, 48 23' S, 65 W, 8 June 1928, 100-106 m. 

 St. WS 243. Between Falkland Is. and Patagonia, 51 06' S, 64 30' W, 17 July 1924, 144-141 m. 

 St. WS 764. Between Falkland Is. and Argentina, 44 38' 15" S, 6i° 58' 30" W, 17 Oct. 1931, 110-104 m. 

 St. WS 787. Off Patagonia, 48 44' S, 65 24' 30" W, 7 Dec. 1931, 106-110 m. 

 St. WS 808. Off Santa Cruz, Patagonia, 49 40' 15" S, 65 42' W, 8 Jan. 1932, 109-107 m. 

 St. WS 838. Between Falkland Is. and Tierra del Fuego, 53 11' 45" S, 65 W, 5 Feb. 1932, 148 m. 



Height 1 1 -5 mm. ; diameter 4-0 mm. (holotype). 



Height 10-5 mm.; diameter 4-25 mm. (St. WS 95). 



Height 17-5 mm.; diameter 6-25 mm. (St. WS 243). 



Height 20-3 mm. ; diameter 6-5 mm. (St. WS 88). 



Protoconch. Fig. N, 118, p. 196. 



Genus Typhlodaphne n.g. 

 Type: Bela piirissima Strebel, 1908 



The relationships of this genus are puzzling. It has a bluntly rounded, smooth, paucispiral proto- 

 conch of two whorls, with an asymmetrical nucleus, a type found in any of the subfamilies. The sinus 

 is most like that of Daphnella in being subsutural, steeply descending and then produced forward at an 

 angle to meet the arcuately produced outer lip, but the presence of an operculum is foreign to the 

 Daphnellinae. The dentition consists of paired marginals only, of the awl-shaped Conid type, not the 

 hiked dagger form, characteristic of the 'Bela' complex, but very similar to those of Phenatoma 

 (Clavinae). 



In several respects, shape, sinus and dentition, Typhlodaphne closely resembles Typhlosyrinx vepallida 

 Martens, 1903, from 1840 m. in the Gulf of Aden, but that genus lacks an operculum and has a globular 

 initial whorl to its smooth, paucispiral protoconch. 



Since the only important difference between Typhlodaphne and Typhlosyrinx is the presence of an 

 operculum in the former and its absence in the latter, I feel that the placing of a high taxonimic value 

 upon the presence or absence of an operculum would sever what appears to be rather close relationship. 

 Admittedly one of the criteria used in the segregation of the Mangeliinae and the Daphnellinae is the 

 absence of an operculum, but in the case of Typhlodaphne the operculum is of vestigial size and may well 

 reflect an archaic condition just as some members of the Clavinae preserve the prototypic complete 

 dental formula of central, lateral and marginal teeth. 



Both Typhlodaphne and Typhlosyrinx are here referred to the Daphnellinae mainly on the evidence 

 of the sinus, which is of a type seemingly excusive to that subfamily. 



Typhlodaphne purissima (Strebel) 



Bela piirissima Strebel, 1908, p. 17, pi. 3, fig. 2ia-d. 



Type locality. Off Shag Rocks, west of South Georgia, 160 m. 



St. 159. Off Cumberland Bay, South Georgia, 53 52' 30" S, 36 08' W, 21 Jan. 1927, 160 in. 

 St. 160. Near Shag Rocks, west of South Georgia, 53 43' 40" S, 40 57' W, 7 Feb. 1927, 177 m. 



Dentition. Fig. M, 92, p. 195 (St. 159). 



Protoconch. Fig. N, 119. Operculum. Fig. N, 130, p. 196. 



Typhlodaphne strebeli n.sp., PI. IX, fig. 53 



This species differs from the glossy, milk-white purissima in being uniformly warm-buff, more 

 slender, with a smaller protoconch and with flexuous, subobsolete axials over all post-nuclear whorls. 

 Shell elongate ovate-fusiform, with a tall spire, slightly less than height of aperture plus canal. Whorls 



