464 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [12] 
The following measurements were taken from mounted specimens: 




Dimensions. | No.1. | No.2. | No.3. | No. 4. 
St on eames — = / mae 
mm. | mm. | mm. mm. 
Enea WR POCUUON fe neu oeancas= omen sana pacecscasnes=mpe teasers aa 37.00 } 21.00) 23.00 74. 00 
AD otis MCI OUUIIA oP. icioe «Seti ciea occ ba tpads (any soabecbeneecee 0. 96 0.90 |...2.<-]-teswaoe 
PePeBO LSM SMOG oi. os 'on's occas a< rience sopaerehceqascesacaperansde 1. 35 1. 60)|. cv cnele ene 
BreaGin OnMGAG ACTOEER the tOp o-- 2552-2 5--t25- oa. ncsemaneenneneset|-ee ease eran | 1.40 2. 00 
Paneth OLOne DOCNTINM, OXPANGed ..<--...osc0 conn nc swese c= asceeers| anced eee eee |) 3, OO) |B eeoeen 
RPE OR Reet 2! A's binwincnien'nm = -inje cancninies abuw cee eeeenee nent 0. 20 0.16; 0.20 0. 24 
INtANCEMNOM NCAA LOALAG BEL... 2-60 \-ssocr seceaa mee cept euace ntl coe cas ail deere | 1.50 1.00 
Distance from head to first distinct segment ................-.------ 1. 80 1.40} 2.00 2. 60 
EOP OMA BOP IMOND: aca a.0.00 ceectsetenscenscerncaneuarpeeeaeueees 0. 10 0.08 | 0.16 0.14 
PrenGunatursh ROP Ment..s. =... 2 csc ccc.ecceeeteace tua Seeteeeecneoeae 0. 20 0. 26 0. 24 0. 32 
Renethiohmaturing segment +... --.-20-ser--cssncuaccens decenccospmes 1. 60 0. 54 (*) 2.00 
Breadun Or maturing BepmMent: 2....5-.55. 22s seecne ce test cceance debe. . 32 0. 247 | cs oeeee 0. 42 
Meno nO OL POSPOliOr SOMMONG « 5. =< 0ccupwecneve bowen wane agence 0. 74 0:80 1:2 2b ees 1. 56 
ESLEAAUOL POSterior SeEMENt..-. 05. sac cemanesecesbeteerckceene + o> | 0. 50 0:46") Soccer 0. 86 
| 




*Mataring segments very irregular, some long and narrow, others thick and short with rounded 
corners. +t Variable. 
Additional measurements of No. 4. 

Length. | Breadth. 


~—- 


mm. mm. 
SUSU GTE TN RO oy eNO Seo oe ee iceeoacaeaaeeessoec te 0. 20 0.3 
Sermoent 20% from head c- -e.<eee--sesamer vaindamiecne es fe FAS ee Ss esos = 4 1.00 0. 34 
PPEMMOnh 0] rOM NOAA wos cocosne teats sen eat core Conecenca Kee Ee Sonate nee eee 1. 50 0. 40 
pepmeny 45) from head. 224. -2asantsere cadens cee ctkiceeae enue lee abepetueeeenitnes 2.00 0. 42 
Boe MennmMoear DOALOMOL ONG. castan eh as bac. tosses peepee ae cok iop alee eae Seek ceecee 2. 40 0. 70 
EAR SEPINODE PMC/ONG +. o-hecec ceoseete cies sb ebUraakcens came ent ames suede ce carse 1.76 0. 80 
Man bROPINON Deseo cn) oa koe user Re een aa tte eet ae hoe Meeen eee eee Ee CEE ene 1. 56 0. 86 
NTAOISE RMN 5: = hos sictbce cone seen cblcee coc ces ke pon ee Cees ate cma eee eb oseee 2. 50 0. 80 
POM mMeN ban ceoch ccs = aceon hp esmemuen uae eat snet oon Eee ako e tote ne meee 3. 00 0. 80 


Habitat.—_Sting Ray (Trygon centrura), spiral intestine. Wood’s 
Holl, Mass., August, 1884. 
PHYLLOBOTHRIUM Van Beneden. 
Phyllobothriwm thysanocephalum,* sp. nov. 
[Plate II, Figs. 1-12.] 
In its sexually mature or strobile condition, this Cestode varies in 
length from 300" to 1™, The head, as best seen in young specimens, 
has four bothria, which are quite early lobed and crisped and folded at 
the edges. In the adult these bothria are deeply lobed, so that even 
in a cross-section (Fig. 10) it is extremely difficult to make out the four 
primary lobes. The frilled, crisped, or ruffled structure of the bothria 
gives to the head, when at rest, a singularly striking resemblance to the 
short, imperfect branches which form the head in the cauliflower. The 
neck, or jointless part of the body, is very long. In one specimen, which 
measures 840™™" in length, the first joints appear about 360™ back of 
the head. Immediately back of the bothria the head is slightly swollen 
and subcylindrical, and in alcoholic specimens nearly as wide as the 
bothria; in the living worm about three-fifths the width of the bothria. 


* QUGav os= a tassel. 
ay, 
nS 
