FAMILY CARAPIDAE — SCHULTZ 393 



with 2 rows of small conical teeth, vomerine teeth slightly larger than 

 other teeth but no caninelike teeth anywhere; none of the gill rakers 

 more elongate than others, all very short. 



Color in alcohol. — Background color plain pale with pigment spots 

 becoming more numerous posteriorly, the last third of body brownish 

 and last fourth blackish or dark brownish. 



Ecology. — Both specimens came from the long, brown-skinned sea 

 cucumber Holothuria atra. 



Genus CARAPUS Rafinesque 



Carapus Rafinesque, Indice d'ittiologia Siciliana . . . , pp. 37, 57, 1810 (type 

 species, Gymnotus acus Linnaeus). 



KEY TO SPECIES OF CARAPUS FROM MARSHALL AND MARIANAS ISLANDS 



la. Dorsal parts of head and body anteriorly and sides posteriorly profusely 

 speckled with brown pigment spots; diameter of eye 3.0 to 4.0 and 

 length of pectoral fin 1.4 to 1.8 in postorbital length of head. 



C. mourlani (Petit) 



16. No pigment spots externally; diameter of eye 2.2 to 2.6 and length of pectoral 

 fin 1.2 to 1.4 in postorbital length of head C. homei (Richardson) 



CARAPUS MOURLANI (Petit) 



Plate 120,E 



Fierasfer mourlani Petit, Bull. Mus. Nat. Hist. Nat. Paris, ser. 2., vol. C, p. 393, 

 fig. 1934 (type locality, southwest coast of Madagascar). 



SPECIMENS STUDIED 



Bikini Atoll: 2 stations, 2 specimens, 88 to 110 mm. in standard length. 

 Rongerik Atoll: 1 station, 2 specimens, 91.5 to 93 mm. 

 Saipan: 1 lot, 9 specimens, 68 to 90 mm. 



Description. — Body elongate, tapering to a point posteriori}^; head 

 about 6 to 8 and greatest depth about 10 to 13 in total length; anus a 

 httle in front of pectoral fin base; anal origin just behind anus; dorsal 

 fin origin distmct, 1.7 and 1.9 head lengths behind tip of snout; median 

 fins continuous around tip of tail; lateral line canal running along 

 middle of the sides; gill membranes joined far forward but free from 

 isthmus; gill opening reaching to a little over K eye diameter above 

 upper edge of pectoral fin base; an opening behind the fourth gill 

 arch; postorbital length of head 1.6 to 1.7 in head; greatest depth of 

 body 1.5 to 1.7 in head and 1.0 to 1.1 in postorbital length of head; 

 eye 3.0 to 3.5 in postorbital length of head; maxillary free posteriorly, 

 reaching past a vertical line through rear of orbit; tip of snout to rear 

 of maxillary 1.9 to 2.1 in head and 1.2 to 1.3 in postorbital length of 

 head; small conical teeth in a narrow band on upper jaw, inner series 

 largest, one or two pairs of short canines near symphysis; lower jaw 

 with band of conical teeth larger than in upper, the outer row with a 



