. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 180 SALLY HUGHES-SCHRADER Tauromantis championi, Stagmomantis Carolina, and Stagmomantis heterogamia (Figs. 4, 5 and 7). The chromosome number (2n^) is 27 in each, comprising 12 pairs of autosomes and the compound sex chromosomes X1, X2 and Y ; the chromo- somes are similar in size, with the exception of the Y chromosome, which is identi- cal in the Stagmomantis species but considerably larger in Tauromantis (Hughes- Schrader, 1950). Of special interest would be a comparison of DNA nuclear content between Choeradodis and the
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 180 SALLY HUGHES-SCHRADER Tauromantis championi, Stagmomantis Carolina, and Stagmomantis heterogamia (Figs. 4, 5 and 7). The chromosome number (2n^) is 27 in each, comprising 12 pairs of autosomes and the compound sex chromosomes X1, X2 and Y ; the chromo- somes are similar in size, with the exception of the Y chromosome, which is identi- cal in the Stagmomantis species but considerably larger in Tauromantis (Hughes- Schrader, 1950). Of special interest would be a comparison of DNA nuclear content between Choeradodis and the Manteinae. The genus is currently elevated to separate sub- family rank, but Choeradodis rhombicollis is shown by the cytological evidence pro- vided by the morphology and behavior of the compound sex chromosomes to stand in closer relation to the X'X-'Y Manteinae than is recognized taxonomically (Hughes- Schrader. 1950). The autosomes of Choeradodis, while numbering two more pairs than are found in the Manteinae, are individually considerably smaller and their total length appears approximately the same as in the latter. Unfortunately, the only. FIGURE 4. Spermatogonial metaphase — Stagmomantis Carolina. FIGURE 5. Same — Tauromantis championi. FIGURE 6. Same — Choeradodis rhombicollis. material of Choeradodis available for photometry gives evidence of considerable cytological abnormality ; the results obtained from it can be regarded as suggestive only. Finally, measurements were made on nuclei of Pseudomiopteryx in jus cat a of the subfamily Pseudomiopteriginae. Here, while the chromosome number (2nJ* = 17) is the same as in Liturgousa ma\a, the total mass of the chromosomes appears to be far less. When compared with the manteine species Stagmomantis heterogamia, the total length of the chromosomes of the Pseudomiopteryx complement is seen to be less than half that in the first named species (Table I and Figs. 7 and 8). The nuclear DNA content of such a karyotype is of
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