Ml. ITL'N. 



i \ i;\\ sri i.nx ./(tun i \ lyd Thompson. 



i t 



Comparativi measurements of '/'. ontariensis, " T. stimpsoni," and T.thompsoni. 



Thoi 

 "Stimpsoni." 



Girard). 



Locality. 



« Length without caudal 



Depth nf body hundre 



Width at pectorals 



Head 



Distance from vent to snout 



Depth of caudal peduncle 



Length of same from anal to caudal rays 



Dorsal rays 



A rial rays 



Pectoral rays 



Branchiostegals 



Length of snout hundre 



Diameter of orbit (hone to bone) 



Maxillary length from tip of snout 



Interorbital width 



Pectoral length i longest ray). . .- 



Pectoral base ( width) 



First dorsal height (longesl raj 



Second dorsal height (longest ray) 



Dorsal bases 



Anal height 



Anal base 



Ventral length 



Lake 

 Michigan off 

 Chi< 



< (ntario off 



0. 



59 



b,-, 

 . 155 

 .33 

 .50 

 .045 

 13 

 V11I-M 

 11 

 18 

 6 

 0. in 

 .09 

 . L5 

 .03 

 . 25 

 .11 

 . II 

 15 

 .28 

 11 

 'J'.i 

 13 



SS 



II 111.-, 



0.16 + 



.(».", 

 . 13 

 VII-18 



i:, 

 is 

 ii 

 (i. 12 



. 1 185 



. i:, 



■>■) 



.09 

 .27 



.30 

 .14 



a All measurements are in hundredth of body length to base of caudal. 



We have compared with this specimen an example from deep water 

 off Chicago (No. 629 Stanford University) collected by Dr. Stephen 

 A. Forbes. To this Luke Michigan species, the name of Triglopsis 

 stimpsoni was given by Doctor Hoy in 1S7'_' " from ;i specimen col- 

 lected by himself. 



Fig. 2.— Triglopsis stimpsoni Hoy. 



This specimen agrees with the description and figures nf Triglopsis 

 f/ioiripsoni from Lake Ontario in till respects except the following: 



Lateral line distinct to last rays of second dorsal. Dorsal rays 

 VIII-14 ; anal rays L 4, ending opposite second dorsal. The soft 

 dorsal is not very much higher than spinous dorsal. In Triglopsis 

 thompsoni, the soft dorsal is three times as high as the first, the dorsal 

 rays are VII-18, and the anal rays I"), the lateral line is distinct to 



aTrans. Wis. A.cad. Sci., L872, p. 98. 



