I. Lepas aiiserifa'a Linn. 



This seems to be by far the commonest species in the part of the tropics explored by 

 H. M. S. "Siboga"; it was not only collected at numerous places during the cruise, it was also 

 several times found attached to the ship itself after being cleaned in the dock of Surabaja. 



The places and stations where the species was taken are : 



Stat. 19. Bay of Labiian Tring (Lombok), March 20, 1S99. Fine set of specimens attached 

 to a piece of wood. Surface. Another set of smaller specimens with a barbed 

 carina attached to a piece of pumice-stone. 



Lighthouse "^De Bril" near Macassar. No date. Very small specimens attached to Spinila, the 

 largest specimen has a capitulum of 6 mm. They belong to the var. dilatata: 

 scuta broad, carina barbed. 



Stat. no. July 6, 1899. Lat. 4° 34' N., Long. 122° E.; South of Sulu Archipelago. Surface. 

 Two specimens; length of the capitulum of the larger, 25 mm. 



Stat. 165. Daram Island (East Coast of Misool), August 22, 1899. Attached to a piece of 

 gulf-weed. Small specimens of 6 mm. and smaller: var. dilatata. Associated with 

 L. fascicidaris Ellis & Solander. 



Buton Strait, September 21, 1S99. Surface, between Algae. Very small specimens attached to 

 Spinda. Var. dilatata with barbed carina. 



Stat. 214. October 27, 1899. Lat. 6° 30 N., Long. 121° 55' E. Surface, attached to Spinda. 



Very small specimens: var. dilatata. 

 Stat. 228. November 14, 1899. Lat. 4°32'.5S., Long. 128° 30. 5 E. Surface. Small specimens 



attached to a species of Fuci. [The largest specimen has a capitulum of 7,5 mm.]. 

 No place, no date. Attached to the keel of H. M. S. "Siboga". One specimen. Length of the 



capitulum 20 mm. 

 July 10, 1899. Attached to the keel of H. M. S. "Siboga", 40 days after having been docked 



in Surabaja. Size of largest specimen: capitulum 21 mm. The larger individuals 



are furnished with ovigerous lamellae. 

 October 15, 1899. Attached to the keel of H. AL S. "Siboga", 107 days after the ship was 



cleaned in the dock of Surabaja. Several specimens; length of the capitulum of 



the largest individual, 25 mm. 



Remarks. The specimens collected in the Bay of Labuan Tring (Lombok) caused me 

 some difficulty as they differed from the usual appearance of L. anserifera in one of its most 

 distinctive characters, viz. in the occludent margin of the scutum not being arched or protuberant. 

 Further, the internal umbonal tooth of the right-hand scutum in these specimens is hardly stronger 

 than that of the left-hand scutum. But as these characters vary even within the specimens of 

 this locality, the form of the scutum in some of them approaching more to the tj'pical form 

 than is the case in others; there e.xisting, moreover, a close resemblance in other regards between 

 this anil the typical form, no doubt was left as to the importance of this difference. Several 

 specimens from this locality show the straight line of small quadrilateral depressions of a dirty 

 brownish colour in the scutum, running diagonally across the capitulum, wliich are very common 

 in L. aiiatifcra. Darwik (1. c. p. 78) observed a trace of a diagonal line of such marks in a 

 single specimen of L. Hilli — but the)- have not been observed before in L. anserifera., so 

 far as I know. 



