192 



CALIFORNIA ACADEMY OK 801ENCE8 



The lateral line is conspicuously devi'lo|Ded in its anterior part only, fur a (llstancc equaling the 

 length of the heatl. 



The ilorsiil spines arc very slender, and increase rej^ularly in leiii;th posteriorly, then- being 

 no notch l)et\veen spinous and soft dors;ils. It differs in this resi)ect from related si)ccies, there iieing 

 a ilistinct though not conspicuous notch in //. ffnili/is and //. fri/bcrli. 



The color is very light olivaceous, with black blotches and markinjjs following the same pat- 

 tern seen in //. t^ilfifrli. Along the Ixick is a series of six quadrate blotches, below each of which is a 

 similar smaller blotch, those anteriorly separated by a light streak corres|)onding in position to the 

 lateral line. Below the middle of sides is a series of dark sjXJts arranged in seven pairs, those of the 

 anterior |Kiirs developed as short vertical streaks. A few scattered smaller spots on head and sides of 

 lK)dy. There is a narrow V-shaped bar on occiput, a broad bar downward from eye to angle of 

 mouth, and a faint V-shaped mark on gular region. A conspicuous oval black hlntcii on front of 

 spinous dors;»l. The tin is translucent with dusky markings not in definite pattern. A conspicuous 

 black ]K)int at the base of each anal ray. The anal is translucent, with a dusky lengthwise streak along 

 the base of the distal third of the fin. Pectorals and ventrals translucent, with some dusky markings. 



Named for Mr. ('. .[. Pierson, a member of the Panama Expedition, to whose 



untiring industry nincli of its success was due. 



Measurements in Hundredths of Length without Caudal. 



Length in mm. to base of cauda 



Head 



Snout 



Eye 



Ga])e of mouth 



Interorbital uidlii 



Length of orbital filament 



Depth of body 



Depth of caudal peduncle 



Length of dorsal base 



Length of anal base 



Length of pectorals 



Length of \entrals 



Length of caudal 



.•?2 



25 



7 



7 + 

 7 



2i 



8 

 20 



8 

 80 



53 

 22 



•5 

 15 



338. Hypsoblennius striatus (Sieindachner) . 



Abundant in the tide-pools of the Panama reef. 



The following details may be added to the original account given by Stein- 

 dachner (1877, p. 15, PI. VIII, fig. 4) : 



The free tips of the rays and spines of the dorsal fin are white, the color less 

 intense than that on anal margin. The edge of the membrane between the spines 



