40 FOSSIL FISHES OF LOMPOC 



third interneural is interspersed. The dorsal fin begins on the head and 

 is greatly elevated posteriorly, but the anterior rays are short, the longest 

 rays iy 2 in head, 2% in depth of body, last rays rapidly shortened. Anal 

 quite similar to dorsal, with long interhaemals, one corresponding to each 

 ray and two to each of the strong, long haemals ; posterior part of anal 

 similarly elevated, about l l / 2 in head. First eight or ten interhaemals short- 

 ened and placed very obliquely; ribs almost obliterated. Body cavity 

 very short, 2% in head, the first haemal and interhaemal enlarged, forming 

 together a sort of curved pelvic bone, bounding the intestinal cavity, 

 as described by Dr. Giinther in PSETTA MAXIMA. No anal spine. Dorsal 

 rays about 80 (76 + ) ; anal rays about 65 ; ventral rays, 6 or 7. Ventral 

 fin small, somewhat in advance of pectorals, well behind eyes, apparently 

 extending along the ridge of the abdomen ; well separated from the anal 

 fin ; pectoral short, broken, of about 13 rays. Caudal mostly obliterated, 

 the dorsal and anal crowding it closely. Eyes apparently on the left side. 

 Several small patches of cycloid scales preserved, much like those of 

 BOTHUS. 



To all appearance this species is an ally of the European brill, 

 BOTHUS RHOMBUS (L), with which it agrees in general form, in num- 

 ber of vertebrae, and in the number of fin rays. It differs, however, nota- 

 bly in the great elevation of the vertical fins. The character of the 

 gill rakers and lateral line cannot be ascertained. We may apparently 

 distinguish the genus ZORORHOMBUS from the European genus BOTHUS 

 Rafinesque (RHOMBUS Cuvier) by the high, sail-like dorsal fin. 



No. 21. A flounder, 81/0 inches long. Back bone with 36 vertebra, 

 some lost ; dorsal beginning at the head, depth nearly or quite half length 

 at head. Vertebral column bent upward at first ; 36 vertebras present, one 

 or two lost. Dorsal low anteriorly, even, beginning on front of head, 

 much elevated; 26 rays over first 12 vertebrae. Other fins mostly de- 

 stroyed. Neurals strong; interneurals divided from below for most 

 of their length. 



This is evidently same as the type of ZORORHOMBUS VELIGER. 



23. Diatomoeca zatima Jordan and Gilbert. 



(Plate XIX) 



The original type of this species, No. 336 (CXXXIII), is a fine speci- 

 men from Lompoc, on a slab unfortunately cut off at both ends for com- 

 mercial purposes. The part preserved is 7 inches long, the whole fish 

 about 14. 



There are, in general, two interneurals between each pair of neurals, 

 each interneural corresponding to a fin ray; the same adjustment holds 



