4) 
482 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [30] | 
Generative organs: male not conspicuous, smooth, marginal, near 
anterior edge of proglottis as in all; female lateral, median, dehiscent, 
in mature proglottides easily recognized as a clear central spot; length 
of strobile as short as 36™™ ; average, perhaps, about 45™™, although it 
seems to graduate into var. 4, which ismuch longer. In one specimen 
measuring 45™™, the last twelve proglottides were mature and had an 
average length of 1™™. 
Measurements of a specimen, var. a, made from a mounted specimen, 
and hence probably a little distorted : 
Millimeters. 
Lenpth of strobile 5.02 .cncse Soe scetce (laws Seeeces hcee ean ces vanessa 36. 00 
Dength of bothria.-...-2- 2-2-2). o 2a ec tke somone enc ceniseces cee ee 0. 80 
PEROT OFCHCAM 2... 00 wane sac eneieenesagaccescanves besdndeneans sess 0. 90 
eM OL DOCKS. oo <b ojo - econ ciwes stew es oe we ee eee mes nines ee ieee 0.70 
Breadth of, necic in front. ....2 22 sid gods Sasol ba Leo. oe 0. 60 
Breadth of neck, posterior’end.: 5. 2. )252 jai 0 les pase Sea bas See see eee 0. 36 
Leupta of proboscis. <2... 22sec) cc siceaciaSawacwcndscnhe =seteeelaa keen 0. 70 
Dengih of proboscis sheath: ....- =... .22< .a.con cce~ santa taeseleushs eee 0, 76 
Lenarth of. contractile bulb, ..... 2. 2 -...ca0 5 keeleeede le see ee 0, 32 
Breadth of contractile bulb... .-.- 1.2% pecsee' sk ck ses. Bs) eevee 0.14 
engi of posterior progloitis’.:.. 0222/2222. ene oe ees es ase nae ae 3 oe 0. 80 
Breadth'of posterior proglottis .20. 5-25 (2225 ccen asec nose ie ose es aa 1.30 
The second group I shall also, for convenience, designate as a variety, 
calling it var. 6 (Plate IV, Figs. 17-20). The strobile, like that of var. 
a, is flat and thin, butis much longer. The mature proglottides do not 
make their appearance until 100™™, or even 200™™, back of the head. 
The first segments are short and broad; the succeeding segments in- 
crease in length until they become longer than broad. The median and 
postero-meédian segments are frequently rounded at the corners, giving 
to the strobile a beaded appearance. This character is usually present 
jn those segments which immediately precede the mature proglottides. 
Usually about three longitudinal striz can be traced on the median seg- 
ments (Figs. 18-19). The posterior segments are rectangular, longer . 
than broad. The following measurements were made on a mounted 
specimen, var. /. 
Millimeters. 
Lengthyot sivebiley. 6152) e ss eee eis ueleGelede Edie ewemnba- ses ameeenee 230. 00 
TORS OL WEA 2 be:s sm i Sewn odode enew seals digest seek io Wis em 4 » Brat are Soha eee 0.76 
PUPAGUN OF OAC: 5 cscs busine saenee, san chs sancep asians secasheaies pode 0.94 
TAPER GEE ee oe a a eas pmemne saad Seen pe ns 6 apes beatae ee 0.70 
PLEA OLOL MOCK IN LLOML sacs cule= ease ace cen ee tenes oasis <2 a's isos ne'e one ee 0,70 
Bresiiborncek, posterior end . oo 2 sate ee we sth Dace alsee eee ence eee 0. 40 
Maome HOT PLO DOSCIBtME 23 SPOTS EEL we eats alas) soa ahs ate tee Ae eel ere 0. 60 
Taength of proboscis sheath -... ...0ceac dnec dens cuca astiseedemets cele eaeene 0.64 
engi, contractile halb, .0). . 1.2.6 \on nate ee bh oavh sclans cick dine an eee 0. 36 
BesOR OR COMRPACOIO DILD coc occ cna cicpe semen «ooh «= 05 ea pnning>ieean Geel 0.16 
Perab OF BtrON1IO DACE Of NOOK... . ie Mas ckna cece nvnaideas Obs toss chee Geen 0. 26 
Lenugul of posterior proglottise) 2) 02.08.22. Ske. Aes te ce ee owen ee eae 1.54 
Breadth of posterior proglottis. ..........-....-- Ul, kPa dle bw ee dS eee 1.20 
A third group, which comprises indiv sdlists that have certain charac- 
teristics separating them from the two preceding groups, I have distin- 
