478 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [26] 
the postero-lateral edges of the segments are each distinctly four-lobed. 
The two original flaps, those near the margins, continue, however, to be 
a little longer and sharper-pointed than the two median ones. At the 
150th segment the two middle flaps or lobes become indistinct, and are 
represented only by gentle flexures of the posterior margin; the notch 
between them is at this peint broad and shallow. From the 160th or 
164th to the 192d segment the median notch deepens gradually, and 
the secondary or median lobes disappear, leaving the postero-lateral 
margin two-lobed, the inner margin of each lobe witha slightly waving 
convex outline. The segments thus far are short and somewhat 
crowded, the length, in the specimen measured, after mounting in 
Canada balsam, uniformly about 0.14™™ to 0.16™™. At the point where 
the segments become two-lobed the margins become rounded, convex, 
the segments lengthen to about 0.20". At the 200th segment the pro- 
glottides are nearly circular in outline, globose in living specimens. At 
this point the segments begin to lengthen abruptly. The average length 
of the last four segments, with circular outline, being 0.64™™, while the 
average length of the next four segments is 1.02™". The last segment 
the 212th in the specimen from which the above measurements were 
taken, measured 1.90™™ in length and 0.84"" in breadth. 
The following measurements are intended to show the proportions at 
different points on the strobile. They were made from mounted speci- 
mens, and consequently may be a little less than they would be if taken 
from living specimens: 
Milimeters. 
Length of specimen .----- -----+ -- 2206 cece ee eee eee te eee cere renee e cen ones 60. 00 
Breadth of head, in front....-. .--------- +2222 eos wee een eens eee eee - 2 Oe 
Length of bothria..---. ..---+ --- +--+ +++ peer eco r ete eee eect eee e eee eee ee 0. 30 
Breadth of bothria, front and middle .--.-..----- 12-20 -----5 eee ne nee e sone 0.10 
Breadth of bothria, posterior end ...--. ---- -------+ -----+ see eee ---- een ee eee 0. 04 
Spread of hooks, tip to tip.----- ----++--++ ----2+ eee cere ne tere eee ee eee eee 0. 16 
Length of hooks .....----------- +++ 205 cere ee cee eet rere cee e scene eee ee 0.14 
Breadth of segments just back of head... ---..-------++-------++-+---------- 0. 076 
Breadth of segments 1mm haclof head “3.22... 52 sb eceste= one kes 0. 09 
Length of segments without flaps.-..-.------------- ek Ge eeies tee mit el ache 0. 127 
Length of segments including Pas os 2th enw gates sa nees Le ses anes eee 0,159 
Breadth of segments 2™™ back of head ...-.--.---. -------------- +--+ +++ +--+ 0.16 
Thickness..-2.. scee. penne ce eee cee ne ene cere ne tee men eens ee nnn ee ee nee 0. 02 
Length 2-222. 222. cone eee ee cee ene ce eee emcee ree nee coe n ee cone ne nn ene ween 0.14 
Length, including flaps.-.. ---- ---- ---+ ----2+ --20 pee ete eee eee creer reeeees 0.16 
Breadth of segments 11™™ back of head ....-.---------------------+- PEP 0.30 
IPI OETIORS 5 a'lidee bet occce doce mess see ans wceutecce© <6bmmeinh => =(-6—8 |: <= = =a 0.08 
Thickness, including flaps -..----- ---- ---- -----+ 2-2-2 eee eee eee ween ee eee eee 0.16 
Breadth of segments 18°" back of head, four lobes...-.--.---.-----------+-- 0. 46 
Length ..-.---- ---- 22-2 eee eee eee cee ee eee nee rene ene teens cone cee eee 0. 16 
IOI ORS snc .cceuk es cic Cisse enn eae cielo wom sdabpinee) se wins» shiem Sees ea le em Sele ee eee 0.10 
Breadth of segments 22™™ back of head .....----- -----+ -----+ +--+ +++ +--+--- Orage 
Breadth of segments 33"™ back of head, two lobes.....-..---- ee ey Ste eae 0. 66 
Length, including flaps ... ....-------- :+ +222 -- 2+ ceee cere cece cee e eee eee ee 0616 
Breadth of segments 45™™ back of head, round segments....s. .s49 hess c8eeeeee 0.78 
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