. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Crustacean Goius: Sicyonella, Bovradaile. 259 lobe. It now seems highly probable, however, that the Torres Straits specimen is immature^. Its length, 20 mm., is less by some 5 mm. than that of the smallest male from the Indian Ocean, and it resembles the females and differs from the males in having (1) the eyes less dilated, (2) the third cheliped less slender and with shorter carpus, and (3) the inner ilagcllum of the antennnles only slightly thickened at the base; in the mal
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Crustacean Goius: Sicyonella, Bovradaile. 259 lobe. It now seems highly probable, however, that the Torres Straits specimen is immature^. Its length, 20 mm., is less by some 5 mm. than that of the smallest male from the Indian Ocean, and it resembles the females and differs from the males in having (1) the eyes less dilated, (2) the third cheliped less slender and with shorter carpus, and (3) the inner ilagcllum of the antennnles only slightly thickened at the base; in the males, the basal part is considerably. A B Sicyoiiella maldioensis, aditlt male (co-type). A. Pelasnia, seen from iu front. B. Apical portion of same, from behind. thickened and excavated on the inner and upper side, wliere it bears a row of strong spines. The differences in tlie pro- portions of the eyes and third chelipeds are shown by the following measurements (in millimetres) :— Indian Ocean. Torres Straits. 6- 2- d. Total length 30 29 20 ' Ocular peduncle • Diameter at base •45 '48 -34 Diam. of corneal area .... 1'12 "76 "56 Tliird cheliped : Carpus, length 3-2 2 88 2-24 Propodus, length 2-2 2-08 1-6 „ diameter -13 -18 -JO Dactylus, length -52 -08 -48 While it is thus fairly clear that Aphareocaris elegans must be I'egarded as a synonym of Sicyonella maldivensis, it is to be noted also that the distinctions which 1 pointed out * The changes in the petasma of Scrgestos during growth have recently been described by Stephensen [''The Copulatory Organ (Petasma) of ISergedes vigihix (Stimpson), II. J. H,," Mindeskrift lor Japetus Steen^ strup, K^benhavn, 1913, pp. 1-5 (sep. copy)].. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original London, Taylor and Francis, Ltd
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