Mr. O. Thomas on a Third Species of Nyctophilus. 405 
between the eyes and the cephalothoracic glands on each side, 
and probably has an excretory function. In the two species 
examined this organ exhibited considerable differences in 
structure. ‘The organs are purely embryonic ; in the youngest 
specimens of harvest-men which I was able to examine I no 
longer found any trace of them. I failed to elucidate their 
fate during the transition to post-embryonic lite. This pair 
of glands ‘reminded me forcibly of the dorsal organ of the 
Myside, as recently described by Nussbaum * and Butsch- 
inskit. Although I did not succeed in observing its first 
appearance, I nevertheless consider it to be very probable 
that it appears, precisely like that of J/ysis (at least in the 
case of the second species of Phalangium), in the form of an 
invagination of the ectoderm. Similar organs have been 
observed by Watase ¢ in Limulus, where they were also 
found to resemble the dorsal organs of MJys’s. Kingsley and 
Patten, however, consider these organs in Limulus to be of a 
sensory character §. As regards Phalangium the glandular 
character of “the lateral or dorsal organs ’’ cannot be open to 
the slightest doubt, as is proved by the numerous concretions 
enclosed in their cells and their excretion to the exterior. 
LXI.— Description of a Third Species of the Genus 
Nyctophilus. By OLpFiELp THOMAS. 
THE genus Nyctophilus was in Dr. Dobson’s ‘ Catalogue of 
Bats ’ || considered to consist in 1878 of only a single species, 
the Australian Long-eared Bat, Nyctophilus timorensis, a 
species with very much the facies, and evidently taking the 
place in Australia, of the Kuropean Long-eared Bat, Plecotus 
aurttus. In 1888 4] I had the pleasure of describing a second 
species of the genus from New Guinea, XN. microtis, which 
* Nussbaum, “Zur Embryologie yon Mysts chameleo,’ Zeitschr. 
Neuruss. Naturf. Gesellschaft in Odessa, xii. Bd., 1887. 
+ Butschinski, “ Zur Entwicklungsgeschichte der Mysiden,” Zeitschr, 
Neuruss. Naturf, Gesellschaft in Odessa, xv. Bd., 1890, 
{ Watase, “On the Structure and Development of the Eyes of Limu- 
lus,” Johns Hopkins Uniy. Cire. vol. viii. 
§ Kingsley, “The Ontogeny of Limulus,” Zool. Anz, 1890; Patten, 
On the Origin of Vertebrates from Arachnida,” Quart. Journ, Mier. Sci. 
xxxil., 1890. 
| eels 
q Ann, & Mag. Nat. Hist. (6) ii. p. 226. 
Ann. & Mag. N. Hist. Ser. 6. Vol. ix. 3 
