1918.] 



NATURAL SCIENCES OF PHILADELPHIA. 



13 



This species differs from the precechng chiefly in its greatly elon- 

 gated tail and shorter snout. Of the various synonyms located with 

 C. spicifer some approach the present species. Perhaps Syngnathus 

 biserialis Kaup^ is closer, it having D. 26 or 27, rings 16+46 and a 

 much shorter tail. The Indian Microphis tenuis Blyth^ is equally with 

 long tail as my example, snout half the head, D. 24? and rings 16+36. 



(For Mr. Edwin S. Mattern of AUentown, Pa., who collected many 

 local fishes for the Academy.) 



Doryichthys philippinus sp. nov. Fig. 6. 



Head 3tV to vent; depth 14^; D. 40; A. 5; P. 21; C. 5; rings 21+24; 

 snout If in head; eye 8|; pectoral 8|; caudal 5|; interorbital 1| 

 in eye. 



Body very long, especially greatly elongated trunk which broad 

 as deep, and deepest midway in its length, tail 1| in combined head 

 and trunk. Tail tapers moderately, and not especially slender at 

 caudal base. Upper keel along each side of back to about last 



Fig. 6. — Donjichthys philippinus sp. nov. 



fifth of dorsal. This replaced by similar parallel keel beginning 

 little beloAv about opposite dorsal origin and continued to end of 

 tail. Median lateral keel from pectoral axil, slopes down to lower 

 body edge extent of first three keels along dorsal base and continuous 

 then to caudal base. Median keel on belly complete from breast to 

 vent. Lower keel along each side of body from head to vent, when 

 slightly approximate over first two abdominal keels, then give 

 place to lateral keels. 



Head elongate, well compressed, and profiles largely alike. Snout 

 little over twice length of postocular region, profile sloping up behind. 

 Eye circular, moderate, center at last third in head. Mouth ter- 

 minally superior, small. Maxillary short, about If in eye, expansion 

 equals pupil. Interorbital slightly concave. Well-developed mecUan 

 keel along snout edge above and one each side which extend to 

 middle of interorbital. Occiput and first 2 rings with mecUan keel. 

 Opercle with well-developed horizontal keel, and from its front end 

 4 less distinct keels radiate obliquely down and back. Opercle and 

 side of rostrum with fine flutings, reticulate and variable. 



«Cat. Lophobr. Fish., 1856, p. 33. 



' Journ. Asiat. Soc. Bengal, 1858, p. 272. 



