226 SCIENCE PROGRESS 



Montgomery, S. K., " Direct Development in a Dromiid Crab," Proc. 



Z.S.. Part I, 1922. 

 OsTERLOH, A., " Beitrage zur Kenntis Kopulationsapparates einiger Spin- 



nen," Zeit.fur Wiss. ZooL, April 1922. 

 RoBSON, G. C, " On the Anatomy and AfiSnities of Paludestrina ventrosa," 



Q.J. M.S., vol. Ixvi, No, 261. 

 Krug, C, " Morphologic und Histologic des Herzens und Pericards von 



Anodonta cellensis," Zeit. fur Wiss. ZooL, April 1922. 

 RocHLiNG, E., " Der Kolumellarmuskel von Helix pom. und seine 



Beziehung zur Schale," Zeit. fUr Wiss. ZooL, April 1922. 



Vertebrate Morphology: — W. H. Leigh-Sharpe continues, in 

 the Journ. of Morph., his series of memoirs on " the compara- 

 tive morphology of the secondary sexual characters of elasmo- 

 branch fishes, — the claspers, clasper siphons and clasper 

 glands " {Journ. of Morph., vol. xxxvi, No. 2, March 1922). 

 Two memoirs on the same subject, dealing with the common 

 British species, have already been published. The third 

 memoir deals with the fossil forms, and the fourth and fifth 

 with specimens which the writer was enabled to study at the 

 Natural History Museum. The same writer describes in 

 Parasitology, vol. xiv. No. 2, a curious tumour occurring 

 amongst the gill filaments of Trigla gurnardus (the gurnard), 

 which bears a female Medesicaste (a copepod), with the head and 

 neck buried in its apex, and a male Medesicaste completely 

 embedded in its base. The two sexes of the parasite are 

 connected by a conjugation tube, external to the tumour, 

 down which the spermatophores presumably pass. 



R. Broom discusses the comparative anatomy of the 

 temporal arches of the Reptilia in a paper in the Proceedings of 

 the Zoological Society (April 1922). On the basis of his inter- 

 pretation, he classifies the Reptiles in four subclasses : 



(i) Anapsida — primitive types with a roofed temporal 

 region, which includes the forms usually grouped as Coty- 

 losaurs. 



(2) Diapsida — including the primitive Eosuchia, Lacertilia, 

 and Thalattosauria. 



(3) Synapsida — mammal-like reptiles with a lower temporal 

 fossa. 



(4) Anomapsida — primitive lizard-like reptiles, with only 

 the upper temporal fossa developed, and their aquatic descen- 

 dants, the Mesosaurs, Ichthyosaurs, Plesiosaurs, and Placo- 

 donts. This sub-class also includes the highly specialised 

 Chelonians. 



Other papers include : 



Regan, C. T., " The Cichlid Fishes of Lake Victoria," Proc. Z.S., Pt. i, 



1922. 

 HoRNYOLD, A. G., " The Age and Growth of some Eels from a small 



Worcestershire Pond," Journ. R.M.S., March 1922. 



