260 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



94. Chloroinyxum leydigii .Miui;:i/znii, IStlO, I'l. ;!7, li.^s. 2-7; pi. 38; pi. 39, 

 fiKS. 1-3. 



• Leydig'.s descrii«tiou is as follows (p. 233, pi. 8, fig. la-/) : Myxosporidium (developmental stages). 

 (1) Eoundish myxosporidia {Mutteihlate}, 29/i to 118n (-0135 to •0540'") with a thin memhrane and 

 yellowish semifluid contents, containing a mass of yellow granules concentrated toward the center, 

 leaving a granule-free border (fig. ia). (2) Other myxo.sporidia of the same siM contain, in addition, 

 several transparent pausjioioblasts (Tochterhlase), wlmse iiuiubor varies with the size of the myxo- 

 sporidium, the smaller having but 1. the largest as many as 6. (3) Other myxosporidia show spores 

 in the sporoblasts, always 1 in eaoli (fig. Ic, d). (4) In the later stages the sporoblasts become very 

 large, nearly' filling' tlie myxosporidium, and separated from its membrane only by a zone which 

 represents a greatly diTiiinished state of the granular mass. Yellow color duo to the absorption of 

 bile pigment. That tlie j^ansporoblast membrane is imperxiims to thi.-j pigment is shown by the 

 unstained condition of the latter. Spore: .Sharp-contoured, untailed. acute ciuioate-oval, anterior 

 extreiiiily pointed, ('ai)sules 4, situated at the anterior end. Free spores also occur. Habitat: Free 

 in gall-bladder of Squatina angehis. 



'The form found iu gallbladder of Acanthias (Spinax) vulgarix is (Jide Perugia) referable to this 

 species. I.eydig's description is as follows (pp. 224-5, 233. pi. 8, fig. 2) : Myxosporidium: Visible to 

 naked eye. similar to that of Squatina angelus except that the appearance ia more varied: round, 

 vermiform, and retort-shaped forms occurring; frequently 2 or 3 round forms are united resembling 

 a segmenting ovum; no movements or pansporoblasts seen. Habitat: Free in gall-bladder of /Spiiia* 

 vulgana. 



3 Leydig's description (pp. 225, 233, pi. 8, fig. 3) : Myxosporidinm (developmental stages). (1) Large 

 (29 to 118,j. : 0135 to -0540 ' ") yellow club-shaped protoidasmic masses of same generi;! character as iu 

 Sqvadna angrlut; pansiioroblasts absent from this stage. (2i The large yellow mas.ses contain 

 much smaller (15fi; -00675'") colorless vesicles with granular contents, tlic latter mostly heajjed 

 together. (3) A transparent pansporoblast is visible through the finely granular contents. On addi- 

 tion of so<lium hydrate, spores become visible in it. Numerous free spores are also seen. Hahitat: 

 Free in gall-bladder of Torpedo narke. 



* Leydig's description (pp. 225, 234, pi. 8, fig. 5): Myxosporidium: Size 29/< tol47fi (-0135 to -0675 '") ; 

 shape, rouudisli, elongated, retort-sha])ed. or vermiform with clubbed ends. Many show only 

 Tuembrane and (loutents; others show well-developed pansporoblasts, sometimes as many as 12, each 

 containing! si)oro. Habitat: Free in gall-l)lad<lcr of ,SV,7/?!nn)i canicula. 



' On the page cited, Lcuckart virtually says that his figure is " after Leydig," and a comparison 

 with figs. 2a,, 2a2 (plate 39) shows it to be a genei'.ilized composite from them. 



Conceniinj;' the synonymy, Mingazzini says: 



All tho8e exauiiiiod l>y me iu the viirioiis spocies oi' tlio VJiKjioxloml (Torpedo, Sti/I- 

 liitm, Squatina, Tnjijon, Ihija, Mustchis, I'rislinrna, etc.) bi^loii;;' to tlic same sjiecics. 



There is. however, in ]\riiig;izzini"s i)ai)er almost ii()thinn' to .show that 

 he studied the spore at all. Only a single sentence lefei's to the 



