64 THE AMERICAN NATURALIST. [Vor. XXXV. 
only twenty-one species. Mr. Adolph Hempel has since that time 
been actively engaged in their study, and as a result he has pub- 
lished a work entitled * As Coccidas Brazileiras,” in which he 
describes no less than 131 species as occurring in Brazil. This 
work, which was received by the present writer on Sept. 26, 1900, 
appears in Vol. IV of the Revista do Museu Paulista, and is, unfor- 
tunately, in Portuguese. By reason of its place of publication and 
the language in which it is written, it may escape the. attention of 
some coccidologists, but it is in reality one of the most important 
contributions to the study ever produced. 
The new genera described are Cryptokermes, Stigmacoccus, Apio- 
coccus, Tectococcus, Tectopulvinaria, Pseudischnaspis, and Diaspi- 
distis. Stigmacoccus, though placed in the Coccinz, is doubtless a 
Monophlebine, and singularly enough, it appears to be identical with 
Perissopneumon, Newstead, described from India in Entomologists’ 
Monthly Magazine, November, 1900. The simultaneous discovery 
on opposite sides of the world of this striking and distinct type is 
remarkable. Pseudischnaspis is an offshoot from Chrysomphalus, 
and will include, besides the Brazilian species, P. Jongissimus (Ckll.) 
and P. bowreyi (CkIl.), hitherto referred to Chrysomphalus. 
T. 1» AS C COCKERELL. 
Notes. — The development of the common tubularian, Parypha 
crocea, has been worked over by C. M. Allen (Biol. Bull., Vol. I, 
p. 291). Each sporosac is an outgrowth of the body wall of the 
polyp, and since it shows evidence of four radial canals, it must be 
regarded as a much reduced medusoid. The genital cells, both male 
and female, are derived from the ectoderm of the medusoid. The egg 
grows by absorbing adjacent cells. Its nucleus is said to be absorbed 
at an early stage and is later re-formed from the scattered fragments. 
Segmentation is very irregular and is often outrun by the nuclear 
divisions. The ectoderm and entoderm are differentiated by delam- 
ination. The embryo escapes as an actinula with both basal and 
buccal tentacles. 
The segmentation of that portion of the neural tube which forms 
the brain in teleosts has been studied by Charles Hill (Zool. Jahro., 
Bd. XIII). The region destined for the forebrain is represented by 
three segments, that for the midbrain by two. These segments early 
disappear and are replaced by secondary expansions which have 
been mistaken for segments. The segments of these two portions 
of the brain are serially homologous with those of the posterior 
