FAMILY CALLIONYMIDAE — SCHULTZ 



409 



Ecology. — This species occurred on the reefs associated with coral 

 heads and sandy bottoms. 



Remarks. — This is the only species of Synchiropus with two dis- 

 tinctive and persistent tiny black spots on males, one on membrane 

 between branchiostegal rays 4 and 5 and the other at lower base of 

 pectoral fin, along with 9 soft dorsal and 8 anal rays. 



Named in honor of Dr. H. S. Ladd, U. S. Geological Sm-vey, who 

 was at Bikini in 1946 and again in 1947. 



Figure 132. — Synchiropus morrisoni, new species, holotype, USNM 141126, from Bikini 

 Atoll. Drawn by Dorothea B. Schultz. 



SYNCHIROPUS MORRISONI. new species 



Figure 132 



Holotype. — USNM 141126, a female 43 mm. in standard length, 

 Bikini Atoll, Arji Island, lagoon coral head, 20 to 40 feet depth, 

 August 7, S-46-308, Herald and Brock. 



Descriptiov .—Only s])ecimen known, dorsal rays IV-8; anal vi,l; 

 pectoral ii,19,i-iii,17,i; pelvics 1,5; branched caudal 4 + 3; pelvic 

 membrane connects with pectoral base opposite eleventh or twelfth 

 ray from dorsal edge of base; number of dorsal and terminal spines on 

 preopercular spine 3 + 3. (See table 119.) 



The following precision measurements made on the holotype are 

 expressed in thousandths of the standard length which is 43 mm.: 

 Length of head from tip of snout to rear tip of preopercular spine 320; 

 greatest depth of body 186; least depth of caudal peduncle 105; snout 

 81; bony interorbital space 19; eye 105; postorbital length of head to 

 rear tip of preopercular spine 167; length of caudal peduncle from base 

 of last anal ray to midbase of caudal fin 198; snout tip to origin of 

 fhst dorsal 319; snout to anal origin 534; length of first dorsal spine 

 202; longest soft dorsal ray 198; longest pectoral ray 253; longest 

 pelvic ray 307; longest caudal ray 349; tip of snout to rear edge of 

 maxillary 81; length of prf opercular spine from its dorsal base to the 

 tip 77. 



