2 68 Memoir Sears Foundation for Marine Research 



toothless membranous section present between these elements; no teeth on mandible or 

 vomer; at most a few granular teeth on palatines, pterygoids, and tongue. Dorsal small, 

 beginning rather nearer to margin of snout than to base of caudal, with about 9—14 rays. 

 Anal only a little larger than dorsal and placed far behind it, with about 12-16 rays. 

 Pelvic fins nearly as long as the pectorals, each with 8 rays; a scale process present 

 between fins at base. Pectoral fins rather small, each with about 10—14 rays. Pelvic 

 and pectoral both without a free Axillary process. 



Remarks. Jenkinsia resembles Etrumeus in having a rather roundish, elongated body, 

 a rounded abdomen, and no bony scutes on the ventral outline of the chest and abdomen. 

 However, in Jenkinsia the chest is very slightly keeled. The rather small anal fin, situated 

 far behind the dorsal, and the rather large pelvic fin, inserted under the anterior half of 

 the base of dorsal, also help to distinguish this genus. The small size of these herrings, 

 about 50—70 mm, also separates them from other herrings. 



Range. Known from Bermuda, doubtfully from North Carolina, the Florida Keys, 

 the West Indies, and from some small islands in the Caribbean Sea, off Mexico and 

 Central America. Only two species are known. 



Key to Species 



I a. Gill rakers not especially close-set, 1 9—24 (usually 20 or 2 1) on lower limb ; oblique 

 series of scales crossing silvery lateral band between margin of opercle and base 

 of caudal, 33—37. lamprotaenia (Gosse) 1851, below. 



I b. Gill rakers close-set, 27—30 on lower limb; oblique series of scales crossing silvery 

 lateral band between margin of opercle and base of caudal, 39—42. 



viridis (T. H. Bean) 1912, p. 272. 



Jenkinsia lamprotaenia (Gosse) 1851 



Dwarf Herring, Green Fry 



Figure 64 



Study Material. Many specimens, 28-65 "^"^ TL, 23-55 "^"^ ^L, collected at 

 Key West and Tortugas, Florida, the Bahama Islands, Cuba, Isle of Pines, Jamaica, 

 Haiti, Puerto Rico, St. Eustatius Island, Old Providence Island, and Yucatan Island 

 off Cozumel, Mexico. 



Distinctive Characters. See Remarks, and Key to Species, above. 



Description. Proportional dimensions in per cent of standard length, and counts, 

 based on 16 specimens, 40— 65 mm TL, 32— 55 mm SL. 



Body: depth 15—20. Snout: length 6.2—8.0. 



Caudal peduncle: depth 6.5-8.5. Eye: diameter 7.6-9.7. 



Head: length 25-29. Interorbital: width 3.8-5.4. 



