430 MOLLUSCA FROM THE HOPE ISLANDS, N. QUEENSLAND, 

 ISOCARDIA MOLTKIANA Gmelin. 



Chama moltklana Gmelin, Syst. Nat. xiii., 1791, p.3303. 



A single broken valve came from the Cairns lagoon; some 

 years previously, I took a similar fragment, in 15 fathoms, off the 

 Palm Islands. 



I note that Hidalgo'**' ascribes this name to Spengler in 1783. 

 This reference is inaccessible to me, but since Sherborn omits it 

 from the Index Animalium, I conclude that Spengler's name 

 was not legitimate. 



DOSINIA EXASPERATA PhiUppi. 



Cytherea (Artemis) exasperata Philippi, Abbild. und Besch. 

 Conch, iii. 1847, p.36, PI. viii., f.4; id., Zeit. fiir Malak. vi. 1849, 

 p.41. 



A single valve, dredged in 8 fathoms, in Weary Ba}'^, off the 

 mouth of the Bloomfield River, extends the range of this species 

 to Australia. 



Gafrarium catillus, n.sp. 

 (Plate xxxvii., tigs.24-27.) 



Shell small, lenticular, margin subcircular, slightly produced 

 anteriorly and angled dorsall3\ Colour dull white, rayed with 

 brown along the sculpture-parting, and the anterior third. Interior 

 white, purple or brown. Sculpture : fine radiating riblets, about 

 forty on the posterior side and a few^ more on the anterior, which 

 diverge at an acute angle from an oblique parting. The riblets 

 proceeding from the parting curve outw^ards and broaden, while 

 additional riblets may be intercalated in the interstices. The 

 riblets are broken and beaded by fine concentric growth-lines, 

 while their interstices are roughened by a secondary microscopic 

 vermiculate sculpture. Height 14; length 16; depth of single 

 valve 3 mm. 



Plentiful, in 5-10 fathoms, off the Hope Islands. The nearest 

 Australian ally is G. navigatum Hedley, from the Capricorn 



* Mem. Pv. Acad. Cien. Madrid, xxi. 1903, p. 363. 



