ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 195 



hinge to the abdominal surface, of the host. The long axis of the 

 parasite has undergone a peculiar rotation, which has resulted in 

 bringing the nerve-ganglion and mantle-opening on to the right hinge 

 of the mesentery. The coUeterial glands (oviducts) are paired and 

 convoluted. The genital openings are asymmetrically distributed owing 

 to the rotation of the mesentery. The nauplius has somewhat elongated 

 and curved frontal horns. The members of the genus are parasitic on 

 symmetrical Decapoda Anomura. The following species are recognized : 

 — L. porcellanae F. Miiller on Porcellana sp., L. galathese Smith on 

 Galathea dispersa and G. intermedia, L. strigosse on G. strigosa, and 

 L. munidae on Mimida hamffica ; but the author indicates the difficulty 

 of finding criteria of a good species in animals which reproduce by a 

 continuous round of self-fertilization, and offer no morphological feature 

 of outstanding importance in which they differ. 



New Parasitic Copepod.* — M. Caullery and F. Mesnil describe 

 Xenocailoma brumpti n. g. et sp., a remarkable Copepod found at 

 Saint-Martin on Polycirrus areiiivorus Caullery, an Annelid inhabiting 

 the fine sand uncovered at low tide. It resembles Saccopsis aUeni, 

 which Brumpt found on P. aurantiacus at Plymouth. The animal is 

 reduced to a mass of tissue imbedded between the ectoderm and 

 coelomic epithelium of the Annelid. The outer wall of the parasite is 

 replaced by that of the host ; the cavity within the parasite is due to a 

 hernia of the coelom of the Annelid ; no trace was seen of gut or 

 nervous system ; the gonads are hermaphrodite (a unique occurrence in 

 Copepods) ; they are imbedded in adipose connective tissue ; there is a 

 large seminal vesicle. It seems that Brumpt's Saccopsis alleni should 

 be removed from Levinsen's genus Saccopsis and ranked in this new 

 genus Xenocmloma, which is certainly one of the most remarkable of 

 parasitic Copepods. 



Monograph on Phyllopoda conchostraca.f — E. Dadayde Dees has 

 completed his account of Conchostracous Phyllopods, dealing in the 

 present instalment with numerous species of the genera Eocyzicus and 

 Cyzicus. 



Androgynous Daphnids.l — B. de la Vaulx found a peculiar female 

 form in a degenerating culture of Dapknia atkinsoni, which had not 

 produced males or ephippia for six months. The form in question was 

 in its general features typically female, but it had on the right side a 

 male antenna. The rostrum was markedly asymmetrical, and the 

 post-abdomen presented features of both sexes. Testes were not seen ; 

 the ovaries were equally developed on the two sides ; the animal 

 produced in its first brood twenty-five normal females. Another 

 androgynous form had a slightly asymmetrical rostrum and a very short 

 male antenna on the right side. The author suggests that the 

 androgynous condition is associated with a reduction of reproductivity 

 in conditions of malnutrition. Influences which would normally result 



* Comptes Reudus, clxi. (1915) p. 709-12 (1 fig.). 



t Ann. Sci. Nat. (Zool.) xx. (1915) pp. 193-330 (40 figs.). 



1 Bull. Soc. Zool. France, xl. (1915) pp. 102-4. 



