394 



THETIS SCIENTIFIC RESULTS. 



Whorls foux-, plus the protoconch. Suture channelled. Sculpture: 

 dense microscopic spiral strise, decussated by obscure growth 



lines ; to the unaided eye the 

 shell is smooth and glossy. Outer 

 lip inserted far back, its edge 

 arcuate. Inner lip spreading, a 

 callus on the body whorl, columella 

 plication weak. Length, 6'5mm.: 

 breadth, 2 mm. 



This species apparently is 

 nearest to T. hojmani, Angas,* 

 a species I have not yet identified. 

 As the figure of that differs in its 

 proportions from the measure- 

 ments given in the text, it is 

 probably inaccurate. If it is at 

 all natural, the two species are 

 distinct, the novelty being a nar- 

 rower shell, with a longer spire. 



One specimen from 22 fathoms off the Manning River. 



Fig. 108. 



V L Y U L A, A. Adams. 

 YOLVULA ROSTRATA, A. Adams, sp. 



Fig. 109. 



Bulla rostrata, A. Adams, Thes. Conch., ii., 

 1850, p. 596, pi. cxxv., f. 154. 



(Fig. 109.) 



Station 49. 



Specimens from Xew South Wales are always 

 smaller than southern examples. When 

 the species is fully grown it is less rostrate 

 at the summit than in juvenile stages. 

 For comparison with the following species, 

 I add an outline sketch of a South Aus- 

 tralian example, 7 mm. long, determined 

 and sent by the late Prof. R. Tate. 



Two shells from G3-75 fathoms off Port 

 Kembla. Mrs. H. Forde has gathered this 

 species at Pambula. 



Angus — Proc. Zool. .Soc, ]877, p. 40, pi. v., f. 20. 



