BY T. HARVEY JOHNSTON AND OTTO S. HIRSCHFELD. 79 
Australasia |  E. Indies Philippines S. Japan 
L. hians L. hians ? ? 
L. murphiana | 
| ? L. rostrum L. rostrum ? L. rostrum 
L. bancrofti 
L. tumidula ? L. compressa L. adamsi 
L. exusta ? ? ? 
SUMMARY. 
1. There are at least five species of Lingula known 
from the Eastern Australian coast : 
(a) L. hians Swainson—Torres Straits ; Keppel Bay ; 
Port Curtis ; Moreton Bay ; ?Cape York ; also from 
Sydney Harbour as an extremely rare animal.— 
(New Caledonia). 
(6) L. murphiana King—Moreton Bay. 
(c) LZ. bancrofti Johnston and Hirschfeld—Burnett 
Head, Ur.ngan, Torquay and Pialba (Hervey 
Bay). 
(d) L. exusta Reeve—Torres Straits ; Dunk Is., N.Q.— 
(British New Guinea). 
(ec) L. tumidula Reeve—Hervey Bay; Port Curtis. 
This is probably not a littoral species but an 
inhabitant of comparatively shallow waters, 
2. There are no undoubted records of L. anatina (i.e., 
L. rostrum) from Australian waters. 
3. The ratio of length to breadth is fairly constant for 
the species. In the case of ventral valves of adults of 
Australian Lingulids they are as follows :—L. hians 2.3 to 
2.47, variable; DL. murphiana 2.2 to 2.3 (practically the 
same as L. anatina, 2.2); L. bancrofti 2.0 to 2.1; L. exusta 
2.2 to 25, variable ; L. tumidula apparently about 1.5 to 
1.6. 
