MoUusca of Enewetak Atoll 



Chapter 14 



E. ALISON KAY and SCOTT JOHNSON 



Universify of Hawaii at Manoa. 

 Honolulu. Hawaii 96822 



INTRODUCTION 



The mollusks of the Marshall Islands were first studied 

 by Demond (1957)* for a summary of the ecology and 

 zoogeography of central Pacific mollusks. Her summary 

 was based on collections made between 1944 and 1957 in 

 the Marshall, Caroline, Gilbert, and Mariana Islands. 

 Although Demond's paper does not specifically cite species 

 from Enewetak, her work was derived in part from study 

 of collections made in 1946 and 1947 at Enewetak by the 

 late J. P. E. Morrison of the National Museum of Natural 

 History during Operation Crossroads and from collections 

 made in 1952 at Enewetak by H. S. Ladd, M. Russell, 



'Earlier records of the mollusks of the Marshall Islands include 

 those of Escholtz (1826), Hoffman (1928), Hatai (1941), and 

 Dietrich and Morris (1953) None mentions Enewetak. 



and R. C. Townsend of the U. S. Geological Survey. 

 These Enewetak collections are deposited in the National 

 Museum of Natural History (USNM), Washington, D. C. 

 Another reference collection of Enewetak mollusks was 

 begun in 1955 when approximately 180 species collected 

 by A. D. Hinckley were determined by Demond (Hiatt, 

 1956, 1957) and deposited at the Enewetak Marine Bio- 

 logical Laboratory (EMBL). Subsequently, cephalopods col- 

 lected and identified by S. J. Townsley (Hiatt, 1957) and 

 other mollusks collected by EMBL visitors and by the 

 authors were added to the EMBL collections. A checklist 

 of the MoUusca of Enewetak Atoll is provided in Table 1. 



Records of the mollusks of Enewetak are found in a 

 wide range of publications. f Monographic treatments of 

 families and genera which record shells from Enewetak are 

 those on Assiminea (Abbott, 1958); Strombidae (Abbott, 

 1960, 1961; Jung and Abbott, 1967); Vasidae (Abbott, 



fAbstracts from the annual EMBL (later known as MPML) 

 reports are cited only if we could not trace subsequent publica- 

 tion. 



TABLE 1 

 Annotated Checklist of Mollusks from Enewetak Atoll* 



Phylum MOLLUSCA 

 Class GASTROPODA 



Subclass PROSOBRANCHIA 



Order ARCHAEOGASTROPODA 

 Family HALIOTIDAE 



Haliotis clathrata Reeve, 1846; Talmadge, 1963: 132; as H ruber clathrata Reeve. 

 Haliotis gemma Reeve, 1846; Talmadge, 1963: 136, pi. 14, Fig. 8; as H jacnensis Reeve. 

 H omna Gmelin, 1791; [Cernohorsky, 1972: 33, pi. 2, Fig. 3]. 

 H planata Sowerby, 1833; [Talmadge, 1963: 135, pi. 14, Fig. 2]. 

 H. uaha Linnaeus, 1758; [Cernohorsky, 1972: 34, pi. 2, Fig 5]. 



*This checklist represents all of the mollusks presently known from Enewetak, both living and fossil. Specimens of species recorded as 

 living at Enewetak are deposited in the National Museum of Natural History, Washington, DC, and/or Bcmice P. Bishop Museum, Hono- 

 lulu, Hawaii The following conventions are used In the checklist: (1) species found living at Enewetak are listed with a citation to a refer- 

 ence figure In square brackets; where species have been previously recorded, the reference Is also cited; (2) families are given In approxi- 

 mate phylogenetic sequence, and within each family the genera and species are listed alphabetically. 



(This table continued on next page.) 



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