668 SUMMARY OF CURRENT RESEARCHES RELATING TO 



with the interesting observation that the colour of the ova of sponges 

 generally f Jlovvs that of the parent, becoming more marked towards 

 maturity. Polejaeff does not state the date at which he observed the 

 spermatozoa of Sycandra raplianus, though this is an important point 

 of which observeis should take due note. 



New British Sponge.* — J. G. Waller describes a sponge belonging 

 to the lowest form of film sponges, found by him at Torbay on an 

 oyster shell cast upon the shore, filled with Cliona northumbrica. It 

 apparently belongs to Bowerbank's genus Hi/meraphia and is specially 

 distinguished by spicules in the form of forceps, as sugar-tongs, or 

 more nearly a lady's hair-pin. The author gives the sponge the 

 specific name of forceps. 



Protozoa. 



Cothurnia lata.j — Prof. D. S. Kellicott thus describes a new 

 species of Cothurnia, attached to a species of Diaptomus, having a 

 stalked spreading lorica with an open, wide aperture, in allusion to 

 which he named it Cothurnia lata. 



" The lorica is transparent, light yellowish brown, extreme length 

 twice the width of the aperture ; the lorica is compressed laterally, 

 so that the sides are nearly plane and parallel. The posterior edge 

 is uniformly curved outwards, or convex ; the other edge is concave, 

 so it is widest at the top. The aperture is not everted, narrowly 

 ellipticated, sometimes with one side more convex than the other ; the 

 margin of the aperture is slightly elevated near the middle. The 

 peduncle is about one-fourth as long as the sheath, and curved. The 

 body of the zooid is attenuated at the lower j)art as in C. astaci and 

 airva ; the nucleus is of the usual pattern, baud-like. Length of 

 lorica • 002 of an inch ; attached to the head of Diaptomus sp. This 

 species resembles the marine form, C. compressa C. and L,, in the 

 flattening of the shell in one direction, but in a plane in the opposite 

 direction there is a total difference, compressa being urn-shaped." 



The Tintinnodea. j — Dr. H. Fol has continued his observations § 

 on this family of Infusoria, and has been able, through the use of 

 improved methods,] | to rectify some of his previous statements and to 

 demonstrate some points of detail which had previously escaped him. 

 As the organization of the Tintinnodes is not much vai'ied be protests 

 against their separation into several families, regarding all known 

 at the present day as forming a single family. 



Nuclei of Protozoa.lF — Dr. A. Gruber treats of the processes of 

 division of the nuclei of some Protozoa, and commences by stating 

 that his method of examination has been that which he has already 



* J.mrn. Quek. Micr. Club, i. (1883) pp. 216-23 (1 pi.). 



f 'Cliicago Times,' lltli August, 1883, in advance of Proc. Amer. Soc. Micr., 

 Gth Aim. Meeting, 1883. 



X Arch. Sci. Phys. et Nat., ix. (188.3) p. 554. 



§ See tills Journal, i. (1881) p. 75G. 



]| See infra, Microscopy j3. 



«| Zeitschr. f. Wiss. Zool., xxxviii. (1883) pp. 372-91 (1 pi.). 



