ZOOLOGY AND BOTANY, MICROSCOrV, ETC. 51 



cells lying in the parenchyma of the body, tlie sub-cuticular cells. Some 

 at least of these cells are to be regarded as myoblasts of the cuticular 

 musculature. There is no ground for regarding them as sunken epi- 

 dermal cells. There is no trace in any of the tissues of the body of an 

 epithelial layer of cells. The lining of the genital ducts is a meshwork 

 of fibres in a homogeneous matrix, with nuclei scattered through it. 

 This passes by gradual transition into the non-nucleated condition 

 described for the limiting membrane of the body. The muscle-fibres 

 are all nucleated, except those of the cuticular musculature. 



New Cestodes. — T. Harvey Johnston describes * Acanthotsenia 

 iidswelli sp. n., a narrow thiead-like rather delicate tapeworm, abundant 

 in the intestine of the common Australian monitor, Varanus varius, and 

 extending as far down as the rectum. A modification and amplification 

 of von Linstow's genus Acaiifho/x.iia is proposed. 



He also describes j ClelumUa parva g. et sp. n., from the intestine of 

 the Jabiru. The new genus belongs to the family Dilepinidie, and lies 

 between Cydorchida and AcantJiocirrus. 



Cestode of Black Snake. | — T. Harvey Johnston describes Proteo- 

 ceplialus (= Ichthyotsciiia) gaUardl ^\).w. from the black snake /'.sr^wfe^ts 

 jyorphi/riact's Shaw, which also tenants a Pentastome {Forocejjfialus), a 

 Nematode {Physaloptera), an Acantliocephalan {Echinorhynchus), and a 

 Hasmogregarine. 



Moiiostomid3B.§ — Willy Kossack has made a welcome revision of 

 Monostomid Trematodes, which have hitherto been very inadequately 

 known. He begins with an account of the structure of the family 

 Cycloca3lida3, and then passes to a systematic survey of the genera — 

 Cydomlum Brds. (10 species), Hsematotrephus Stoss. (2), Hyptiasmus 

 Koss. (8), Typhloccehnn Stoss. (1), and Spaiiiometra Koss. (1). He then 

 goes on to the family Notcotylidas. 



Parasites of Fishes. H — James Johnstone describes Paracotyk cani- 

 cidse g. etsp. n. from the dogfish. Its diagnosis reads : — " One anterior 

 sucker ; posterior sucker small, and without radial ridges or chitinous 

 armature ; intestine without lateral diverticula ; one testis ; one vagina 

 on the left side ; genital aperture in the middle line." He also deals 

 with KoeUilceria filkoUe (Rudolph i) from Brama raii, and PontohdelJa 

 laevis (Blainville) from a very large ray. He describes hard fibroma in 

 a pilchard, soft fibroma in a haddock, and melanotic mixed-cell sarcoma 

 in a skate. 



Structure of Nephrocephalus sessilis.f — K. Miestinger gives an 

 account of some of the structural peculiarities of this Trematode, which 

 Odhner found in the gullet of the crocodile. 



* Journ. and Proc. R. Soc. N.S. Wales, xliii. (1900, received 1911) pp. 103-16 

 (1 pi.). 



t Journ. and Proc. R. Soc. N.S. Wales, xliii. (1909, received 1911) pp. 139-47 

 (1 pL). 



X Ann. Queensland Mus., No. 10 (1911) pp. 175-82. 



§ Zool. Jahrb., xxxi. (1911) pp. 491-590 (3 pis.). 



II Trans. Liverpool Biol. Soc.xxv. (1911) pp. 88-122 (5 pis.). 



t Arbeit. Zool. Inst. Univ. Wien, xix. (1911) pp. 289-96 (5 figs.). 



E 2 



