402 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 2 



also there is a pale-centered dark opercular blotch; fins barred with 

 dark blotches similar to Schultz's figure of I), dorotheae and Herre's 

 (1936) figure of C. cooki. There is but one adult female with mature 

 eggs (from Rongerik Atoll) and it is more strikingly colored than any 

 other specimens; the dark brown bars on back, one through base of 

 spin}^ dorsal, second at origui of soft dorsal, third through bases of 

 last two dorsal rays, and fourth on caudal peduncle, sharply contrast 

 with the blotched yet whitish interspaces; rear two-thirds of spiny 

 dorsal fin blackish, tip of first dorsal ray white; anal fin plain trans- 

 lucent, except for a dark spot on distal part of membrane between first 

 and second anal rays, followed by a narrow dark streak, distally, the 

 margin and tips of anal rays white; opercular blotch is in the form of 

 a short narrow dark streak; side of body between lateral lines with 6 

 dark blotches; keel of lower lateral line with 6 or 7 dark spots. 



Ecology. — This species occurred on the ocean and lagoon reefs, but 

 was never taken in great abundance; specimens occurred down to a 

 depth of 30 feet. It seemed to prefer areas where there was a sandy 

 bottom around coral growths. 



Genus CALLIONYxMUS Linnaeus 



CalUonymus Linnaeus, Systema naturae, ed. 10, p. 249, 1758 (type species, C. lyra 



Linnaeus). 

 Calliurichlhys Jordan and Fowler, Proc. U. S. Nat. Mus., vol. 25, p. 941, 1903 



(type species, CalUonymus japonicus Houttuyn), 

 Repomucenus Whitley, Australian zool., vol. 6, p. 323, 1931 (type species, 



CalUonymus calcaratus Macleay). 

 Callimucenus Whitley, in McCulloch Suppl. Checklist fishes N. S. Wales, 3rd ed., 



No. 398, p. 418, 1934 (type species, Callionymus macdonaldi Ogilby). 

 Velcsionymus Whitley Ibid, p. 418 (type species, CalUonymus lirniceps Ogilby). 



In the genus Calliurichtkys the tip of the preopercular spine is 

 supposed to end in a straight point instead of being curved dorsally 

 or sometimes hooked forward, but there is too much variation in this 

 character for it to serve as the basis for a separate genus. 



In attempting to identify our Northern Marshall Islands specimens 

 referred to Callionymus, the descriptions and figures of the following 

 Pacific species belonging in the genus have been studied, and if the 

 holotype occurs in the National collections its number is listed: 

 C. caeruleonotaius Gilbert 1905, USNM 51603; C. corallinus Gilbert 

 1905, USNM 51581; C. decoratus Gilbert 1905, USNM 51609, C. 

 umbrithorax Fowler 1941, USNM 99433; C. scabriceps Fowler 1941, 

 USNM 99406; C. boleogenys Fowler 1941, USNM 99408; C. 

 marisinensis Fowler 1941, USNM 99410; C. hudsoni Fowler 1941, 

 USNM 99412; C. longi Fowler 1941, USNM 99418; C. brunneus 

 Fowler 1941, USNM 99419; C. pvnctilateralis Fowler 1941, USNM 

 99422; C. keeleyi Fowler 1941, USNM 99425; C. distethommatus 

 Fowler 1941, USNM 99426; C. leucobranchialis Fowler 1941, USNM 



