HAWAIIAN CIRRIPEDIA. 



185 



ALEPAS Hang. 



Kude, leatherj- forms, with a single lilaim-nluus appendage on each side, and a long, many- 

 jointed caudal appendage. About a dozen species hitherto known are mostly from deep water. 



The primary division of the genu.': should be into those forms which have the endopoditi- or both 

 rami reduced on the fifth and sixth pairs of cirri, and those in which the rami are not reduced and are 

 subequal in all. In ,1. rex, described below, the fifth and sixth endopodites are so specialized. In 

 .1. pcrcarinala they are unreduced and subequal. 



The forms taken by the Albatross were seated upon large sea-urchin spines and gorgonians on a 

 bottom of fine sand and mud. such as sea urchins ordinarily inhabit. 



Alepas percarinata, n. sp. 



jPl. IV, tig. S.j 



The capitulum is irregularly ovate, dorsally carinated, much longer than the slender peduncle, 



straightened on the occludent margin, without trace of calcareous or chitin<nis plates. ( 'olor pale brown. 



The orilice is very small, not protuberant, less than half the length of the capiluliini, with puckered 



Fig. 2.- Alepas percar inula. .\, Cirri uf tlip left side; b, nia.xillii; r, mandible: l'. iniuidiiilt? of s[K:fini( ii frniii elation 3828. 



lips. The dorsum is acutely carinated, the edge of the keel smooth. The surface is finely wrinkled 

 transversely. The short slender pedunc-le is coarsely wrinkled, and sparsely warty, a few scait<'r(><.l 

 warts also appearing on the adjacent base of the capitulum. 



Length of capitulum 9 mm.: breadth 7 mm., diameter 5 mm. Length of orifice ;i mm. : length of 

 jiedunele 4 mm., diameter 2 mm. (Cotype. station 411G.'i Another specimen (station 3S66): Length of 

 capitulum 12.5 mm., breadth 10 mm., diameti'r (i mm. Length of orifice 4 mm. Length of peduncle 

 •') mm., diameter 3-5 mm. 



Mandil)le with three teeth and two spines at the lower extremity'. The upper tooth is largest, the 

 second al)out midway of the toothed margin; the third is more slender. The lower edges of the second 

 and third teeth are denticulate by (he projection of short colorless spines. The lover l)order of the 

 mandible is densely pilose (fig. 2, c). 



