38 SUMMARY OF QUERENT RESEARCHES RELATING TO 



Trematodes of North Queensland.* — \V. Nicoll establishes two 

 new genera, Dolichopera from a carpet-snake and Aptorchis from a 

 turtle, both referred provisionally to the family Lepodermatidse. In 



Dolichopera, the cuticle is covered with spines ; the ventral sucker is 

 smaller than the oral sucker and situated behind the middle of the I tody ; 

 the oesophagus is short, and the diverticula extend to near the posterior 

 end of the body ; the genital aperture is between the oral sucker and 

 the margin of the body, on the right or left side : the cirrus-pouch is 

 sinuous and elongated ; the ovary is behind the right posterior quadrant 

 of the ventral sucker ; the testes are behind the ovary near, the posterior 

 end of the body, longitudinally oval and somewhat asymmetrical, the 

 left testis being in advance ; the yolk-glands are entirely lateral in the 

 posterior part of the body ; the uterus is very voluminous, filling up the 

 whole of the middle of the body, and passing between the testes only 

 for a very short distance. The ova are 0*03 to 04 mm. in length, 

 and about 0*02 mm. in breadth. 



In Aptorchis, the cuticle is beset with moderately large spines : the 

 intestinal diverticula are short ; the testes are exactly midway between 

 the ventral sucker and the posterior end of the body ; the ovary lies 

 midway between the two surfaces ; it is almost median and somewhat 

 oval ; the yolk-glands are entirely lateral and extend from a little 

 behind the ventral sucker to the posterior end of the body ; the uterus 

 is very voluminous; the numerous ova measure 0*028 to 0*031 mm. 

 by 0*018 to 0*019 mm. The author also describes new species of 

 Glonorchis, Echinostoma, Eurgtrema, Mesomlium, Lepoderma, Prostho- 

 gonimus, Hemistomum, Strigea, and Telracotyle. 



Trematode Parasites of Fishes from the English Channel. f 

 W. Nicoll examined 79 species of fishes (475 specimens) arid found 

 80 p.c. (380) infected with parasitic worms — 56 p.c. with Trematodes, 

 44 p.c. with Cestodes, 48 p.c. with Nematodes, and 2 p.c. with Echino- 

 rhynchs. Fifty different species of Trematodes were obtained, about 

 three-fifths of the total number of Trematodes known to occur iu British 

 marine fishes. Nicoll describes Steringotrema pagelli (Nicoll), Bacciger 

 bacciger (Rud., Stoss), Bucephalus minimus (Stossich), Rhipidocot g I c 

 minima (Wagener), R. viperse (van Ben.), Prosorhynclius triglse (?), and 

 other forms. 



Incertse Sedis. 



Development of Balanoglossus clavigerus.J — G. Stiasny traces 

 the development from the egg to the Tornaria, which takes about forty 

 hours. The cleavage is at first total and equal, and of the radial type ; 

 inequality sets in at the fourth division. A morula is formed which 

 becomes a cceloblastula. The flattened cells of the vegetative pore are 

 invaginated' in gastrulation and the blastopore is shut. From the most 

 anterior part of the archenteron the water-vascular vesicle is constricted 



* Parasitology, vi. (1914) pp. 333-50 (2 pis.). 



* Journ. Marine Biol. Assoc, x. (1914) pp. 466-505 (6 figs.). 



J Zeitschr. wiss. Zool., ox. (1914) pp. 36-75 (3 pis. and 24 figs.). 



