466 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [14] 
Measurements made on the largest specimen were as follows: 
Pos length Of Btropue. |. 6 ona ns deweernene Sse=~ncahn pene mesnaieceees meter.. 1 
BYEAGUh OF NOAC aera cs. clee re esisenemelsas con ere Some) cece eae eee millimeter.. 15 
Mhickness'or head, marginal 2252 7<\-csil- ati 2 <i = ~(e ame = 12 ele ete ee eee dol ide 
ISTOBATNMOLINOGKG tis o chiee spec alee olmicjalo wt law nin inine’sin cu seie kia eee oieieee Sie do... sine 
BLOROTOIOL POSTCTION SOGZWIOND. once seme ncre ce necicn= a cc~ anne see ae eles eee do... 5 
PENPt OL MORTOLIO’ HOGMONG o-on oc --- = sues = seen hievaerises eles es pee do 2 
In this specimen all the mature proglottides had evidently hacia 
separated from the strobile. On another specimen, measuring 580™™ 
in length, the posterior proglottides were mature, and measured 5™™ in 
length and 24"™ in breadth. 
Measurements of free living segments give the following proportions: 
Length, 8™"; breadth, 4 to 4.5™™; length of penis, 4™™+. 
A second and younger stage ye represented by specimens ranging 
in length from 190™™ to 250". These differed from the next stage, 
described below, in size and in having a more or less evident beginning 
of a jointed condition. This, in the smaller forms of this second group, 
was indicated by tolerably distinct waving transverse lines. The largest 
specimen of this group, 230™™ In length, although tapering to a point 
at the posterior end like the others, had distinct segments for the last 
|e 
Another group, consisting of quite young specimens, ranging in length 
from 31™™ to 57™™, represented a third stage in the development of this 
worm (Figs. 7, 8). These are evidently the young of this species. 
Measurements of one of them give the following dimensions: 
Millimeters. 
Pion pl Ol PPOCHMEI psp Leen v= c2- scat enceblchaclsceele Me vaae econ nee nee 41.00 
pn ein) Ol MEAG. len S28 See clean bonne neni eeinatwdmsealeuemae sets siceme eee 1.50 
Wea tnNOL OA sce silence sous scents ene sche cn vsmtees shed eben Ole een 2.25 
PPh OF TOSCOMMM: ct eicea cde cme de quel. bale tame eils Waa e ieee tastes 0. 50 
readin of neck-jusb. back of head:<- 5-04 05 jewe seeees cece e seat ame ee eee 1.00 
ISPABALN-Of POSGELIO?, OXITOMIUTY 32... << paps cenek wanes ese~ sce noe peeeaee een 0. 20 
The neck increases slightly for a short distance back of the head. 
The body then tapers gradually and uniformly to the posterior end. In 
this group there is no sign of joints. Most of the specimens, particu- 
larly after they have been preserved in alcohol, have a much more com- 
pact arrangement of the folds of the bothria than appears in Fig. 7, 
which was sketched from a living specimen, one of the smallest of the 
lot. In larger specimens of this group the head is subglobose, with the 
edges of the bothria in crisp, closely lying folds, so that it is very dif- 
ficult to make out the number of lobes of the bothria or to determine 
whether the latter are pediceled or sessile. The bothria are marginal, 
sessile, or on very short pedicels, each divided into at least two second- 
ary lobes, which ultimately become a mass of crisp folds. In the center 
of the head, placed anteriorly, is a short chitinous rostellum on a pedi- 
¢el of soft connection tissue (Figs. 7, 7a, 7b). Seen from the front this 
rostellum is quadrate, and presents to view four crescent-shaped bodies 
(ig. 7a) with their convexities turned inward and inclosing a clear 
