522 THE VOYAGE OF H.M.S. CHALLENGER. 



defined pad stretches across the body, which is flat and expands thinly on the straight 

 shortish pillar. H. 015 in. B. - 07. Penultimate whorl, height - 03. Tip of apex, 

 breadth 0-013. Mouth, height 0-05, breadth 0'04. 



This is a remarkably short and blunt form, more like an Olostomia, but without the characteristic 

 apex of that genus. 



24. Eulima dissimilis, 1 Watson (PI. XXXVII. fig. 5). 



Eulima dissimilis, "Watson, Prelim. Report, pt. 17, Journ. Linn. Soc. Lond., vol. xvii. p. 128, sp. 22. 

 April 17, 1874. Port Jackson, Australia. 2 to 10 fathoms. 



Shell. — Small, translucent, thin, narrow, straight, cylindrical, with a short spire, a 

 blunt rounded tip, whorls of which the earlier are short and rounded while the last two 

 are high and flattened, an impressed suture, and a round mouth. Sculpture: There are 

 faint unequal microscopic lines of growth. Colour translucent, glossy white. Apex 

 blunt, roundly and evenly pointed. Spire short, cylindrical below, roundedly conical 

 above. Whorls 5^ ; above they are short, rounded, and of slow increase, but the last two 

 are somewhat long, cylindrical, and of rapid enlargement ; the base is long, slowly con- 

 tracted, but at last rapidly rounded. Suture distinct, and constricted above ; below it 

 is less so. Mouth short and round, pointed above, patulous but not guttered in front. 

 Outer lip circularly curved ; its thin edge is quite level. Inner lip is very straight, with 

 a thin definite-edged pad on the body and pillar, the latter of which is short. H. O'll in. 

 B. 0-03. Penultimate whorl, height 0-026. Tip of apex, breadth 0*009. Mouth, height 

 0-03, breadth 0"027. 



This is a very aberrant form, with curious resemblances to Rissoa cpidaurica, Brusina, 2 and 

 Rissoa striata, Adams, but is, I think, a true Eulima, and is also probably mature. It is slightly 

 like Eulima campyla ; but is smaller and straighter, with a larger blunter apex and small round 

 mouth. 



25. Eulima eurychades, 3 Watson (PI. XXXVII. fig. 7). \ 



Eulima euryehades* Watson, Prelim. Report, pt. 17, Journ. Linn. Soc. Lond.; vol. xvii. p. 129, sp. 23. 



Station 185b. August 31, 1874. Lat. 11° 38' 15" S., long. 143° 59' 38" E. Off 

 Raine Island, Cape York, North Australia. 155 fathoms. Coral sand. 



Shell. — Small, strongish, porcellanous, glossy white with a smoky band, somewhat 

 like a Pwpa-shell but more conical, straight, with a blunt tip, flat-sided whorls, a strongly 

 impressed suture, and a small round mouth. Sculpture : There are obscure microscopic 



1 As not like a Eulima at all. 



2 The identification of this species with Rissoa glabrata, v. Miihlf., seems to me very doubtful. 



3 hpxu&fc, wide gaping. * Printed by mistake eurychada. 



