ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 37 



infection or of disease. Evidence of blood-regeneration was furnished 

 by the appearance of large numbers of erythroblasts (normoblasts) which 

 increased with the progress of the disease. Tats are much less easily 

 infected than dogs, and monkeys are altogether insusceptible. Man, also 

 was found to be insusceptible to infection with dog hook-worm. 



Nematode Cyst in Alligator's Stomach.* — A. M. Reese describes 

 and figures a cyst of an immature Ascaris tenuicollis, 7-"> mm. in length, 

 found as a swelling on the outside of the stomach of an eighteen inch 

 Florida alligator. 



Platyhelminthes. 



New Genus of Avian Cestodes.f — H. A. Baylis describes Octo- 

 petalam gutterse sp. n. from the intestines of a guinea-fowl (Guttera 

 edouardi) from Nyasaland. The scolex is unarmed, without rostellum, 

 but with a slight conical papilla at the apex. The suckers are com- 

 pletely covered by overhanging epaulette-shaped appendages of their 

 anterior borders, each of these appendages having a marked median 

 cleft extending for some distance from its free edge. The neck is very 

 short. The segments are anteriorlv much broader than lono' : the 

 posterior segments are about three times as long as broad, the last being 

 the largest and narrowest. A single pair of lateral excretory vessels is 

 present throughout the strobila, connected in each segment by a trans- 

 verse vessel. There is a single set of reproductive organs in each 

 segment. The genital pores are irregularly alternate. The vagina 

 opens behind the cirrus-sac, in the same horizontal plane. A paruterine 

 organ is developed in front of the uterus in the gravid segments. The 

 yolk-gland is dorsal to the ovary. The eggs have three transparent 

 envelopes. In the " auricular appendages " of the suckers and in external 

 appearance the new genus resembles Tetrabothrius : in the possession of 

 a paruterine organ it approaches more nearly to the Idiogeninre among 

 the Davaineidas, or to the Paruterininaj among the Hymenolepidte. 



Studies on Cestodes.f — F. E. Beddard describes Kliabdometra 

 cylindrica sp. n. from an African partridge. It is a long slender form, 

 about a millimetre in diameter. He also discusses the structure of 

 OtiiHtsenia eupodotidis with especial reference to the hint of the beginning 

 of a paruterine organ. There is an alteration of structure in the whole 

 medullary layer in the direction of increased firmness ; but there is no 

 special part of that parenchyma set apart for the sheltering of the 

 growing embryos. In genera like Oochoristica and Lmstowia the ripe 

 embryos lie in the unaltered parenchyma. A slight increase of special- 

 ization of the conditions observable in Otiditsenia leads at once to such a 

 form as Sphyroiicotseaia where a large conical paruterine organ exists. 

 which is distinct from the surrounding medullary parenchyma. 



* Trans. Amer. Micr. Soc, xxxiii. (1914) p. 138 (1 pi.). 

 t Ann. Nat. Hist., xiv. (1914) pp. 414-20 (2 pis.), jj 

 \ Proc. Zool. Soc, 1914, pp. 859-87 (11 figs.). 



