ESPECIALLY MYCTOPHOIDS 7 
Family ICHTHYOTRINGIDAE Jordan, 1905 
Diacnosis. Head excessively elongated and shallow; body unelongated. 
Post-temporal fossa roofed. Parietals meet in the mid-line. Orbitosphenoid and 
basiphenoid present. Posterior infraorbital bones expanded. Mandibular sus- 
pensorium vertical or near vertical. Preoperculum with no ventralspine. Vertebral 
elements relatively well fused ; centra longer than deep. Body covered with thin 
cycloid scales enlarged along the lateral line. Dermal bones smooth, devoid of 
ornamentation. 
Genus ICHTHYOTRINGA Cope, 1878 
DiaGnosis (emended). Ichthyotringidae in which the head is very shallow and 
elongated. Dermal bones of the head smooth and unornamented. Jaw suspension 
vertical or inclined very slightly forwards. Branchiostegal rays approximately 9 in 
number. Vertebrae 40 in number, of which 17 are caudal. Individual centra longer 
than deep. Pectoral fin with up to 20 rays. Pelvic fins abdominal with as many 
as 12 rays. 
Type species. Ichthyotringa tenuirostris Cope. 
REMARKS. Cope’s generic name Ichthyotringa (1878:69) replaces Rhinellus 
Agassiz (1844 : 260) which is preoccupied. 
Ichthyotringa furcata (Agassiz) 
(Text-figs. I—4) 
1844 hinellus furcatus Agassiz , 2: 260, pl. 580, fig. 5. 
1849 Rhinellus furcatus Agassiz ; Heckel : 340, pl. 23, fig. 10. 
1850 Rhinellus furcatus Agassiz ; Pictet : 44, pl. 8, figs. 3, 4. 
1866 Rhinellus furcatus Agassiz ; Pictet & Humbert : 82, pl. 11, figs. 5-8. 
1873 Rhinellus furcatus Agassiz ; von der Marck : 60, pl. 2, fig. 4. 
1887 Rhinellus furcatus Agassiz ; Davis: 608. 
t901 Fhinellus furcatus Agassiz ; Woodward : 266, pl. 13, figs. I, 2. 
1908 Rhinellus furcatus Agassiz ; Priem : Io, pl. I, fig. 13. 
1932 hinellus furcatus Agassiz ; Woodward : 162, fig. 249. 
1954 hinellus furcatus Agassiz ; Siegfried : 21. 
1964 Ichthyotringa furcata (Agassiz) Danil’chenko : 418, fig. 140. 
1966 hinellus furcatus Agassiz ; Lehman : 203, fig. 201. 
D1aGnosis (emended). Jchthyotringa of standard length not exceeding 10 cm. 
Head with opercular apparatus occupies half the standard length. Mandibular 
suspensorium vertical. Dorsal fin with 12 rays, mid-way between occiput and 
caudal peduncle. Anal fin with 15 rays arising behind dorsal fin, nearer to caudal 
than to pelvics. Pelvics in advance of dorsal fin with 11 rays. Vertebral column 
with 40 vertebrae. 
HoLotyPe. Present location unknown to the author, at one time in the Amic 
collection in Paris. The holotype was from the Upper Senonian of Sahel Alma, 
Lebanon. 
