FAMILY PLATYCEPHALIDAE — SCHULTZ 61 



type, then for the paratypes, respectively: Dorsal rays always IX-12; 

 anal 12, 12, 13, 12, 12, 12, 12, 12; pectoral ii,14,v-ii,15,iv, i,15,v- 

 i,15,v, i,16,iv-i,16,iv, i,15,v-i,15,v, i,15,v-i,15,v, i,15,v-i,15,v, i,15,v- 

 i,15,v, i,14,vi-i,14,vi; branched caudal rays 5+4 or 5 + 5; gill rakers 

 developed on first gill arch 1 + 1+4, 1 + 1 + 5, 1 + 1+4, 1 + 1+5, 

 1 + 1+4, 1 + 1+4, 1 + 1+4, 1 + 1+4; pores in lateral line 52, 52, 52, 

 53, 52, 53, 52, 53; vertical scale rows below lateral fine 76, 79, 82, 81, 

 80, 80, 81, 84; vertical scale rows from upper edge of gill opening to 

 base of caudal fin 58, 59, 59, 61, 60, 62, 61, 64, and 58; scales in a 

 postero-oblique row from spiny dorsal fin to lateral line 7, 8, 8, 7, 8. 

 8, 8, 9; and from anal origin to lateral line 15, 16, 16, 16, 16, 17, 17, 17, 





Figure 148. — A sketch of the cranial spines of Thysanophrys arenicola, new species, 

 holotype, USNM 141007, from Rongelap Atoll 



The following measurements, expressed in thousandths of the 

 standard length, are recorded, first for the holotype, then for tliree 

 paratypes. Standard lengths 128, 173, 176, and 75 mm. Length of 

 head to rear of fleshy operculum 324, 324, 330, and 340; snout 104, 

 104, 102, and 109; lengthwise axis of bony orbit 62, 61, 54, and 71; 

 greatest depth of body 117, 124, 122, and 123; width across body at 

 pelvic insertion 219, 231, 239, and 200; tip of snout to rear of maxillary 

 145, 139, 139, and 143; least width of bony interorbital 41, 39, 40, 

 and 33; postorbital length of head 152, 156, 165, and 153; least depth 

 of caudal peduncle 55, 54, 53, and 51; length of first dorsal spine 

 23, 24, 26, and 30, and of longest dorsal spine 166, 156, 153, and 167; 

 longest ray of soft dorsal 156, 153, 147, and 163; of pectoral 172, 156, 

 179, and 192; of pelvic 262, 284, 274, and 296; of caudal 191, 208, 

 205, and 260; and of anal 90, 98, 114, and 109; snout to dorsal origin 

 341, 347, 341, and 353, and to pelvic insertion 371, 381, 386, and 386. 



Greatest depth 7.2 to 7.8; width of body across insertion of pelvics 

 4.1 to 4.8; length of head from tip of snout to rear fleshy edge of 

 operculum 3.0 to 3.1; all in standard length. Snout 3.1; &ye 4.2 to 



